Terms of use

Version of 12 October 2026. The legally binding version is the Ukrainian one; this is a translation for convenience.

1. Who provides the service

Kira Lang is the app for Android and iOS and the website kiralang.app. The service is provided by:

• Provider: individual entrepreneur (FOP) Riasna Sofiia Volodymyrivna, taxpayer ID (RNOKPP) 3872001402.
• Address: 08205, Ukraine, Kyiv region, Bucha district, Irpin, Kobylianskoi Olhy St., building 1v/9, apartment 16.
• Country of registration: Ukraine.
• E-mail for anything — support, data, cancellation, complaints: hello@kiralang.app.
• Phone: +380 75 245 00 87.

An email to hello@kiralang.app is an official request to us, even if it’s written in plain words without legal wording.

Below — “we”. These terms are a public contract (offer) concluded in electronic form under the Civil Code of Ukraine and the Law of Ukraine “On Electronic Commerce”; no paper copy is needed. By using the app or the website you accept these terms. If you do not agree, do not use the service.

2. What Kira Lang is

Kira Lang is spoken-language practice in a dialogue with Kira, an AI-based conversation partner: lessons, roleplay scenes, a vocabulary and calls from Kira at the time you choose. Kira doesn’t underline mistakes in red: she shows the corrected phrase and keeps the conversation going — the way live teachers correct.

You can talk with Kira in several target languages. The structured content — courses, the big lesson path, the vocabulary and the roleplay scenarios — is built for English; if you choose another language, the app says so plainly.

For Kira to reply, your message — as text or a short voice recording — and a learning context (your name if you gave it, level, languages, topics and the country from your phone settings) are sent to our server and to AI technology providers (including OpenAI). More in section 12 and in the privacy policy.

The app may send you notifications: practice reminders, “calls” from Kira at the time you choose, and news and tips. Reminders and calls run only after you have set them up; news and tips are off until you turn them on yourself in Profile → “Reminders”. You can also turn off all notifications in your phone settings. There is no advertising in the app; we do not send promotional SMS or make marketing phone calls.

3. Access without sign-up

For ordinary use Kira Lang has no account, login or password. On first launch the app receives an anonymous identifier — you enter nothing. It is shown in the app as the “Support ID” (Profile → “How it all works”, with a copy button next to it): support uses it to find your data if you write to us.

The only exception is a service account that Kira Lang gives to specific people, for example an app store reviewer: it is signed in to with an email address and a password (“Sign in” on the first screen). You can’t register such an account yourself, and regular lessons don’t need one.

Clearing the app’s data or reinstalling gives you a new identifier. How this affects the subscription — section 10; progress — section 12.

4. Age

The service is for people aged 18 and over. On first launch the app asks your age once; the answer itself is not stored. By using the service you confirm that you are 18 or older and able to enter into this contract. If we learn that someone under 18 is using the service, we may end their access and will delete the data we can find by their “Support ID”. You can write to us about this at hello@kiralang.app.

5. The replies are generated by artificial intelligence

Kira is artificial intelligence, not a person. Replies, explanations, translations and assessments are produced by a language model: it can make mistakes, invent facts and correct wrongly. Don’t rely on the replies for important matters and check anything essential yourself. Kira’s replies are not professional — medical, psychological, legal or financial — advice.

Kira is not a teacher with a verified qualification: her replies are generated automatically, without a person’s involvement and without review by a teacher. Explanations of grammar and pronunciation, translations and dictionary entries may be inaccurate: for exams, official documents and work, check them against textbooks, dictionaries and official materials. Kira does not replace a qualified professional — a doctor, psychologist, lawyer or financial adviser.

The app tells you right in the conversation that your partner is an AI. You can report any reply: the report is saved on the device and sent to us so we can tune the filters.

Kira is not a psychologist or an emergency service. If the conversation shows you feel so bad that you are thinking of hurting yourself, Kira will stop the lesson and tell you where to turn: the safety protocol.

Kira is not a person or a friend in the human sense: she has no feelings and does not form a relationship with you or any duty of care. Talking to Kira does not replace talking to people, professional help or emergency services.

6. Voice and microphone

The microphone works only while you hold the talk button; nothing is recorded in the background. The recording of your message (no longer than a minute) is sent to our server and to a speech-recognition provider, turned into text and not kept afterwards. If our server is unavailable, your phone does the recognising. Kira’s replies are voiced by a speech-synthesis service from the text of her reply. The microphone is optional: you can always write to Kira instead.

Kira’s voice is synthetic: a speech-synthesis service creates it from the provider’s standard set of voices (the phone’s synthesiser if the server is unavailable), based on the text of the reply. We do not clone or imitate the voice of any real person, and we do not use your voice to build a voice model.

7. What is available for free and what limits apply

The free mode is permanent, not a trial:

• 5 minutes of live conversation per day. Every lesson is a conversation, so lessons use minutes; the vocabulary and word review do not. The limit resets once a day by the device’s date.
• Open without a subscription: the basic lessons and all 120 lessons of the big A1–C1 path, the first lesson of each of Kira’s courses, the first two word packs, 9 of 12 roleplay scenarios, the day streak, tasks, XP and stars.

Besides minutes, server-side limits apply: a daily number of requests to the model, a short mandatory pause between messages and an overall daily cap for the whole service, after which the service is temporarily unavailable. We set these values, and they may change.

8. The Kira PRO subscription

Kira PRO is the service’s only paid product. The subscription gives:

• conversation without a daily minute limit;
• all 12 roleplay scenarios;
• all lessons of Kira’s courses, not just the first in each;
• the whole vocabulary.

“No daily limit” refers to conversation minutes. An extremely high number of requests per day may be limited by anti-automation protection — normal use is never affected.

The subscription is set up, paid for and renewed in the store you installed the app from: Google Play on Android, the App Store on iOS. Only the store sees your card details — we never receive or store them. Weekly, monthly and yearly cycles are available — the content is the same, only the billing frequency differs. The store shows the current price in your country’s currency before you confirm the purchase.

The subscription renews automatically until you cancel it. To avoid being charged for the next period, cancel at least 24 hours before it starts: how to cancel.

Before you confirm a purchase, the app and the store show the plan and period, the amount, the date of the first charge, the fact that the subscription renews automatically, and how to cancel. By confirming the purchase in the store you agree to recurring charges for the selected plan until you cancel the subscription. The store shows the final amount payable (including taxes, where they apply); any additional fees charged by your bank or carrier are outside our control. If you started the weekly plan with a trial and did not cancel before the trial days end, the paid subscription starts automatically afterwards at the weekly price the store showed before you subscribed. Cancelling is free: there are no penalties or extra payments for it.

The free trial is 7 days and only on the weekly plan. The monthly and yearly plans have no trial days: the first charge comes right away and covers the whole cycle. The store decides whether you are eligible for the trial and shows it before you subscribe.

Buyers in the EEA and the UK have a statutory 14-day right of withdrawal; it may be lost if you agree to start using the subscription right away. Consumer rights under the law of Ukraine and of your country of residence are not limited by this.

9. Starting and ending access

PRO access opens once the store confirms the payment. If the store has confirmed it but our server hasn’t seen the receipt yet, access is granted in advance and removed at the next check if the receipt isn’t confirmed. The subscription period is determined by the store’s answer, not by our calculations.

You cancel in the store: in Google Play — Play Store → your profile → “Payments & subscriptions” → “Subscriptions”; in the App Store — Settings → your name → “Subscriptions”. The “Manage subscription” button in the app opens the right screen. The paid period runs to its end and there are no new charges; after that the free mode applies. Cancelling during the trial days: there will be no charge, and access remains until the trial ends.

If a charge fails, the store gives a grace period — access is kept during it; while the subscription is on hold or paused, access is suspended and is not extended until the store confirms the payment.

The store decides on refunds under its own rules: Google Play — via your order history, the App Store — via reportaproblem.apple.com. PRO access ends when our server learns of the refund from the store, but no later than the end of the period for which it was opened; until then it may remain. We’ll help look into it from our side, but we can’t refund you ourselves: the payment goes through the store. This does not limit any right to a refund that you have under the mandatory law of Ukraine or of your country of residence (including the right of withdrawal in section 8 and your rights under sections 17 and 19). If you believe you have such a right, write to hello@kiralang.app and attach your “Support ID”: we will help you submit the request through the store. The store’s rules do not cancel or reduce these rights. More — about charges.

The payment document is your store’s order history; the payment history in the app is shown for convenience only.

10. Restoring purchases and devices

The subscription is tied to the store account (Google or Apple) you subscribed with. After reinstalling, clearing data or on a new device, tap “Restore purchases”: sign-in is anonymous, and a new installation won’t see the subscription by itself.

Google Play: one purchase — one active installation; restoring on a new device removes PRO from the previous one. App Store: one purchase works on three installations with the same Apple Account at once; a fourth gets PRO only through “Restore purchases”, and then PRO is removed from the oldest one. Passing the subscription to other people is not allowed.

11. Crystals

Crystals are the in-app currency. You can’t buy them with money: they are earned for lessons and daily sign-ins, and the reward grows with your streak. Crystals are spent on word packs in the vocabulary; an unlocked pack stays yours for good, including when the earning rules change. Crystals have no monetary value and cannot be withdrawn, exchanged or transferred.

12. Your data and how progress is stored

Progress — lessons, words, XP, streak, crystals and settings — is stored on your device. It survives a reinstall and moves to a new device only if backup is enabled in your phone settings (Google or iCloud). PRO access is determined by the store and our server, not by the backup: on a new device or after reinstalling, tap “Restore purchases” (a cached copy of the PRO entitlement stored on the device may be included in the backup — see section 2.2 of the privacy policy).

Messages — as text or voice recordings — are sent to our server and on to the language-model and speech-recognition providers; after the reply they are not kept on the server. The server keeps the PRO entitlement, subscription details, the payment history, daily counters, the notification address and the feedback and reports about AI replies you have sent — all tied to the anonymous identifier. You can erase them right away: Profile → “Delete my data”. Otherwise they are deleted 12 months after the app last contacted the server; while a subscription is active they are not deleted. Deleting your data does not cancel a subscription bought in the store: cancel it separately (section 9), otherwise the charges continue.

Details — in the privacy policy and on the data deletion page.

13. Your messages and requests to the AI

Everything you enter into the service — your messages to Kira as text or voice, answers in exercises, the name you give when you get acquainted, feedback and report texts — is your content. You are responsible for it and confirm that you have the right to use it and that it doesn’t infringe other people’s rights or the law.

Don’t enter other people’s personal data or confidential information in the dialogue: passwords, card numbers, trade, medical or banking secrets, documents under a non-disclosure agreement. Messages are processed automatically as learning text — the service isn’t designed for such information.

You grant us a limited licence to your content solely to provide the service: to process a message, pass it to the language model and speech recognition providers, show and voice the reply, provide support and comply with the law. We don’t use your conversations with Kira to train models — neither ours nor anyone else’s. What exactly is shared and with whom is in the privacy policy.

You’re free to use Kira’s replies and corrected phrases for your learning and in your life.

14. Right of use and intellectual property

While you use the service — and for PRO, for the term of the subscription — you receive a limited, non-exclusive, personal, non-transferable right to use the service materials for your personal learning only. Ownership of the materials does not pass to you.

Lessons and courses, the curriculum, dictionaries and word sets, role-play scenes, exercises, Kira’s image and voice, texts, the interface, graphics and program code belong to us or are used by us lawfully; they are protected, in particular, by the Law of Ukraine “On Copyright and Related Rights”. You may not:

• publish, sell or pass on lessons, scenes, word sets or substantial parts of them — publicly, in messengers, on social networks or in other people’s courses;
• mass-copy or export materials, including by automated means, or create mirrors and archives of them;
• build courses or products for sale on the basis of our materials;
• remove or alter authorship notices.

Perfectly fine: making personal notes, reviewing words anywhere, using what you’ve learned in your life and work.

The name Kira Lang, the character Kira and the logo are our distinguishing marks. You may not use them without our written consent, including in domain names, account names, advertising or in a way that suggests a partnership with us. Mentions of Google Play, the App Store, OpenAI and other third-party marks are for information only and don’t mean a partnership. If you believe that materials in the service infringe your rights, write to hello@kiralang.app: what the work is, what your rights are based on and where the disputed material is.

15. Learning results

Kira Lang is a service for practice, and the result depends on you: on how regularly you practise, how much time you spend and where you start. We don’t guarantee that you will reach a particular language level, pass exams (IELTS, TOEFL or others), get a job, relocate or obtain a visa. The A1–C1 levels in the app are a guide within the programme, not a certificate or proof of language proficiency. The subject of the contract is access to the service and its materials, not the achievement of a specific result.

Assessments, levels, scores, stars and XP in the app are a guide for your practice. They are not an exam result, a certification or a recommendation.

16. How you may and may not use the service

The service is for personal, non-commercial learning. You may not:

• bypass the daily limits and the anti-automation protection;
• access the service by automated means;
• transfer or share the subscription and the purchase receipt;
• try to gain access to someone else’s PRO entitlement;
• use Kira’s replies to deceive or harm other people.

You also may not enter into the dialogue, or ask Kira for: sexual material, including material involving minors or sexualising them; material inciting violence, self-harm or hatred; instructions for unlawful acts. If you meet an inappropriate reply, report it under the message or write to hello@kiralang.app. For breach of this rule we may restrict access in the manner described below.

If you materially breach these rules or sections 4, 13 and 14, we may restrict or terminate your access to the service. As a rule we warn you first and give you a reasonable chance to fix the breach. We act at once only if the breach puts the security of the service, data or other people at risk or is clearly unlawful. If you disagree with a decision, write to hello@kiralang.app and we will consider your arguments.

17. Availability and limitation of liability

The service is provided “as is” to the extent permitted by mandatory law. We work to keep it stable, but we don’t guarantee uninterrupted and error-free operation: it may be temporarily unavailable because of limits, load, server maintenance or failures at providers we depend on (hosting, the language model, the app stores). This does not release us from our responsibility to you for performing the contract. You make decisions based on the model’s replies yourself, so check anything essential (section 5). This reservation does not exclude or limit our liability for our own breaches of the contract or the law.

The service may be unavailable in countries where providing it is prohibited by law or by the terms of our providers.

If the service doesn’t work as described in these terms, write to us and we will fix the problem within a reasonable time. If we can’t fix it, you are entitled to a proportionate price reduction or to terminate the contract under the law on digital content and digital services.

Our total liability is limited to the amount you actually paid for the subscription for the period in which the claim arose. This limitation does not apply to liability for intentional acts and gross negligence, for harm to life and health, or where the law of Ukraine or of your country of residence does not allow such liability to be limited or excluded by contract.

18. Force majeure

Neither party is liable for failing to perform obligations because of circumstances beyond reasonable control that could not be foreseen or prevented by reasonable measures: hostilities and shelling, martial law and air-raid alerts, power and communication outages, natural disasters, major failures at infrastructure providers, cyberattacks, acts of public authorities. Deadlines are extended for the duration of such circumstances. If because of them the service was unavailable for a significant part of the paid period, write to hello@kiralang.app and we will sort it out fairly.

19. Changes to these terms and the service

We may update these terms — as the product develops or when the law or the services we use change. Each version has a date (at the top of the page). We announce material changes in the app in advance, before they take effect; changes do not apply retroactively and don’t affect rights that arose before them.

We announce material changes that increase your obligations or limit your rights (in particular the price, what PRO includes, how auto-renewal works, liability) in the app at least 30 days before they take effect. If the law of your country requires your separate consent to such a change, we will ask for it, and until then the previous version applies to you. Continued use of the service does not, by itself, count as consent to a new paid service or a new recurring charge. If you do not agree with a change, do not renew the subscription (section 9) and, if you wish, delete your data (section 12).

Changes that concern money — the price, what PRO includes, how auto-renewal works — are introduced only with prior notice and apply to an existing subscription no earlier than the next period. The store notifies you of a price increase itself and, where its rules require, asks for your consent.

The service evolves: we add, change and remove lessons and features. If a change noticeably reduces what PRO includes, we will announce it in advance, and within 30 days of the change you may terminate the contract and get a refund for the unused part of the paid period — write to us and we will help you arrange it through the store.

If a new version of these terms doesn’t suit you, cancel the subscription in the store before the next charge and delete your data.

20. Governing law and disputes

These terms are governed by the law of Ukraine, in particular the Civil Code of Ukraine and the Laws of Ukraine “On Consumer Protection”, “On Electronic Commerce”, “On Digital Content and Digital Services” and “On Personal Data Protection”.

If you have a complaint, write to hello@kiralang.app: what happened, the “Support ID” from the app and the outcome you want. We reply within 14 calendar days. If we can’t agree, the dispute is resolved by a court under the law of Ukraine; you may also contact consumer protection authorities. Writing to us first is not required before going to court or to the authorities.

For users from any country: the mandatory consumer protection rules of your country of habitual residence, where they apply to you, including the right to go to court in that country, remain fully in force. Users from the EEA and the UK also keep their data protection rights (GDPR and UK GDPR).

21. Other provisions

If any provision is found invalid, the rest remain in force. Provisions that by their nature survive the end of the contract (sections 13–15, 17 and 20) remain in force after it ends. These terms are published in several languages; the Ukrainian version prevails, the others are provided for convenience (exceptions for certain countries are in section 22). You receive our notices in the app; send yours to hello@kiralang.app. If we don’t exercise a right straight away, that is not a waiver of it.

22. Additional provisions for certain countries

This section applies only to users who live in the country named and supplements sections 1–21. If there is a conflict, this section prevails as regards you.

22.1. Japan

1. Payment terms. Before you confirm a purchase, the app and the store show the plan and subscription period, the amount, the method and date of the first charge, the fact that the subscription renews automatically, and how to cancel. For the weekly plan with a trial they also show when the trial ends and what amount will be charged afterwards. This document does not replace those notices.
2. AI. You are talking to an automated system, not a person. Its replies may be incomplete or inaccurate, do not guarantee any result and are not professional advice; check them yourself before important decisions.
3. Cancellation and refunds. Cancelling stops further charges; there is no fee or penalty for cancelling. The provisions of section 9 saying that the store handles refunds apply only to the extent permitted by the law of Japan and do not deprive you of any right to terminate the contract or to a refund that arises from mandatory rules (including the Consumer Contract Act and the Act on Specified Commercial Transactions).
4. Changes to the terms. We change these terms as regards you only on reasonable grounds, taking into account the purpose of the contract and the effect of the change on you, and we tell you in advance, in the app, what the change is and when it takes effect. Silence or continued use of the service does not count as consent to a new paid service or a new recurring charge.
5. Liability. No “as is” reservation, liability cap or user-risk provision excludes or limits our liability for intent or gross negligence, or for breach of contract on our part, to the extent that the law of Japan prohibits such exclusion or limitation. A limitation for ordinary negligence is to be read narrowly.
6. Language. If a Japanese version of these terms or of the payment notices is available, it prevails for you to the extent required by the mandatory law of Japan.

22.2. Mexico

1. Language. If a Spanish version of these terms is available for users in Mexico, it prevails for you over the other versions where they differ, to the extent required by the Ley Federal de Protección al Consumidor (LFPC).
2. Subscription. Before you confirm a purchase, the app and the store show the amount, how often you are charged, the date of the first charge and how to cancel. Recurring charges start only after your explicit confirmation in the store. You can cancel at any time in the store; there is no penalty for cancelling.
3. Refunds. The provisions of section 9 apply only within the limits of the LFPC. The store may carry out the technical refund procedure, but its rules do not cancel or reduce your rights under the law of Mexico.
4. Changes to the terms. We do not unilaterally change the rights and obligations of an existing consumer in a way the LFPC prohibits. We announce material changes — to the price, recurring charges, what the paid features include, cancellation, liability — in advance and, where the law requires, apply them to you only after your explicit consent; if you do not agree, the previous terms apply until the end of the paid period.
5. Liability. Nothing in these terms excludes our civil liability where that is prohibited, shifts our responsibility to you or to a third party, shortens periods set by law or creates extra formal obstacles to your claims.
6. Disputes. Section 20 does not mean that you waive the protection of the LFPC or must turn only to foreign courts. You keep the right to turn to the competent authorities and courts of Mexico, including PROFECO.
7. Additional services. We do not add paid services without your explicit consent; silence does not count as consent.