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Pending lawyer review. These terms are a draft and not yet in force.

Solved Math Terms of Service

Last updated: 2026-11-11. Operator: Sergiy Bondarev, IČO 23604280, Bachmačská 691, 280 02 Kolín, Czechia (“we”, “us”). Contact: support@halfpast.io.

1. About these Terms

1.1 These Terms are an agreement between you and us for the Solved Math app and its online services (the “Service”). By installing or using the Service you agree to them. If you do not agree, do not use the Service.

1.2 Our Privacy Policy explains what data we process and why.

2. Who can use Solved Math

2.1 Age 13 and over. Solved Math is intended for people aged 13 and over. If you are under 13, you may not use the Service. We do not knowingly allow anyone under 13 to use it.

2.2 Users under 18. If you are 13 or older but under 18, or under the age of majority where you live, you may use the Service only with the permission of a parent or legal guardian where the law of your country requires it. Your parent or guardian should read these Terms with you. A parent or guardian who allows a minor to use the Service accepts these Terms on the minor's behalf and is responsible for the minor's use of it, including purchases.

2.3 Your age range. The app never asks for your birth date. Where Google Play or the App Store provides an age range for your account because a law requires it, the app uses that range; otherwise it asks you once for your age range (under 13, 13–15, 16–17, 18 or older). It uses the range only to decide whether the app may be used and which protections apply, and it stops before connecting to any online service if the range is under 13. Everyone under 18 gets the protections for teenagers (see §9 and the Privacy Policy).

2.4 Accurate information. You must give your real age range, must not use the Service to get around an age range provided by your app store, and must not let a child under 13 use it on your device.

3. Your account

3.1 The app creates an anonymous account when it first needs an online feature (for example an AI solve). You do not need to give your name or e-mail address.

3.2 You may link a Google account (“Back up & sync”) so that your credits and Plus subscription survive a reinstall or move to another device. Google's own terms and age rules apply to your Google account.

3.3 Settings → Privacy shows a Support ID. Quote it if you want help from support, if you ask us to delete an account without Google sign-in, or if a parent needs to identify the account (§4).

3.4 You are responsible for activity on your device and account. Tell us at support@halfpast.io if you think someone used your account without permission.

4. Accounts found to be under 13

4.1 If we learn that a user is under 13 (for example from a parent or guardian, from an age range provided by Google Play or the App Store, or from what the user tells us), we will close any account we hold for that user, delete the related personal data as described in our Privacy Policy, and stop the Service from being used with that account.

4.2 Parents and guardians can ask us to do this by writing to privacy@halfpast.io with the Support ID if available, or with enough detail for us to find the account. We may ask for reasonable information to confirm that the request is genuine. We normally complete deletion within 30 days.

4.3 Unused credits on such an account are not transferable. Purchases may be refunded through Google Play or the App Store under their refund policies.

5. The Service

5.1 On-device solving. Many problems are solved on your phone, offline and free of charge.

5.2 Online features. Reading a photo of a problem (“scan”) and AI solutions use our servers and our AI service provider. They cost credits or, on the Free plan, a free daily use unlocked by watching a rewarded ad. If an AI feature fails or is unavailable, the credit or free use is returned.

5.3 We may change, suspend or limit features (for example daily limits, regions where online features are offered, or which features need credits), and we may stop offering the Service in a country. The Service is not offered in some countries, including Russia.

6. AI features

6.1 AI processing. Photo reading and AI solutions are produced by artificial intelligence. To provide them we send the photo or problem text you choose to send to Anthropic, our AI service provider, which processes it on our instructions. We do not send your name, e-mail address or account identifiers to Anthropic.

6.2 You are talking to an AI, not a person. AI-produced solutions are labelled as such in the app.

6.3 Answers may contain mistakes. AI can misread a photo or make mathematical errors. The app checks many AI answers with its own engine, but it cannot check all of them. Check important results yourself, ask a teacher when in doubt, and use the Service to learn, not to cheat. Do not rely on the Service for exams or any decision where an error could harm you.

6.4 Maths and study only. The AI features are for maths problems. Requests that are not maths, or that ask for unsafe, harmful or adult content, are refused and are not charged.

6.5 Reporting. Use “Was this helpful?” on a solution to tell us about a wrong or inappropriate answer.

7. Credits, Plus and purchases

7.1 Credits pay for online features (one credit per scan or AI-solved typed problem; the first AI solve of a scanned problem is included in its scan). Credit packs never expire. Credits have no cash value, cannot be exchanged for money, and cannot be transferred to another account except through the “Back up & sync” Google sign-in. Until you save them with Google, bought credits stay with the app on this device and are lost if you delete the app's data or your data.

7.2 Plus is a monthly or yearly subscription that gives 100 credits per month (up to 50 a day) and no ads. Unused monthly Plus credits do not roll over. There is no free trial.

7.3 Purchases are made through Google Play (or the App Store) and are subject to their terms, prices and refund policies. Prices are shown in the app as the store provides them, in your local currency. Subscriptions renew automatically until you cancel them in the store; deleting the app or your data does not cancel a subscription.

7.4 Free plan. The Free plan includes at least 3 free AI uses a day, each unlocked by watching a rewarded ad (in some countries two ads). We may make the Free plan more generous; we will not make it less generous.

7.5 Right of withdrawal (EEA, UK). As a consumer you have a legal right to withdraw from a purchase within 14 days. When you buy a subscription or credits, you ask us to start providing the digital service immediately, and you acknowledge that you lose the right of withdrawal for credits once you use them and, for a subscription, to the extent the service has already been provided. Refunds go through the store. Your mandatory consumer rights are not affected.

8. Purchases by minors

8.1 Purchases are subject to the store's family or parental approval settings (such as Google Family Link).

8.2 If you are under 18, ask your parent or guardian before buying credits or a subscription.

8.3 Nothing in these Terms limits any right a minor or their parent or guardian has under local law to cancel or reverse a purchase.

9. Ads

9.1 On the Free plan the app shows rewarded ads from Google AdMob only when you choose to watch one to unlock a free AI use. Plus has no ads.

9.2 Ads are limited to content suitable for teenagers. If you are under 18, or the app does not know that you are 18 or over, ads are never personalised; in the EEA, the UK and Switzerland, Google then serves only limited ads without consent-based storage on your device. If you are 18 or over, ads may be personalised as described in the Privacy Policy (in the EEA, the UK and Switzerland only with your consent).

10. Acceptable use

You must not:

We may limit, suspend or close an account that breaks these rules, after a warning where reasonable.

11. Your content

11.1 You keep any rights you have in the problems and photos you send. You give us and our service providers a non-exclusive licence to process them only to provide, secure and improve the Service as described in the Privacy Policy (for example, a solved problem's text may be stored without any link to you in a shared answer cache).

11.2 You must have the right to send what you send.

12. Our rights

The app, its design, its solving engine and its content belong to us or our licensors. These Terms give you a personal, non-transferable licence to use the app for your own learning. Open-source components are listed in the app (Settings → About → Legal → Open-source licences) under their own licences.

13. Warranties and liability

13.1 The Service is provided “as is” and “as available”, to the extent the law allows. Your statutory rights as a consumer, including conformity rights for digital content in the EEA and the UK, are not affected.

13.2 We are not liable for indirect or consequential loss, or for loss caused by relying on an answer contrary to §6.3, to the extent the law allows. Nothing in these Terms limits liability that cannot be limited by law (for example for death or personal injury caused by negligence, or for fraud).

14. Ending the agreement

14.1 You can stop using the Service at any time and delete your data in Settings → Privacy → Delete my data, or on the account deletion page. Cancel any subscription in your app store.

14.2 We may end or suspend your use for a serious breach of these Terms, or if required by law (including §4).

15. Regional terms

15.1 EEA, UK and Switzerland. You have the statutory rights of consumers in your country, which these Terms do not limit.

15.2 United States. Purchases are made through the app store under its terms. Nothing in these Terms limits rights you have under the laws of your state. If you have a complaint, please contact us first so we can try to resolve it.

16. Changes to these Terms

We may update these Terms. We will tell you in the app before an important change takes effect. If you do not agree with a change, stop using the Service and delete your data.

17. Law and disputes

These Terms are governed by the law of the Czech Republic. As a consumer you can always rely on the mandatory law of your country of residence and bring a claim in its courts where the law allows. Consumers can also settle a dispute with us out of court: the body responsible is the Czech Trade Inspection Authority (Česká obchodní inspekce, Štěpánská 567/15, 120 00 Praha 2, adr.coi.cz).

18. Contact

Sergiy Bondarev, IČO 23604280, Bachmačská 691, 280 02 Kolín, Czechia. Support: support@halfpast.io. Privacy and parents: privacy@halfpast.io.