Delta12 · legal
Terms of use
In short
- You buy the programme once through the App Store. Nothing renews automatically.
- Apple is the seller and handles payments and refunds.
- Delta12 is not a medical device. You exercise at your own risk; if you have health problems, talk to a doctor first.
- You can delete your account and all your data in the app at any time.
1. Who runs the app
The Delta12 app is run by Peter Buchlák, company ID (IČO) 87549301, Na Zlaté stoce 1886/5A, 370 05 České Budějovice, Czech Republic (“we”). Contact: hello@delta12.app.
By using the app you agree to these terms. For an app downloaded from the App Store, Apple's standard Licensed Application End User License Agreement also applies. How we process personal data is described in the Privacy policy.
2. What Delta12 is
Delta12 is an iPhone app for a 12-week programme: a measurement week (week 0), then 12 weeks of a plan for training, sleep, habits and nutrition principles, a weekly check-in with photos and a questionnaire, a weekly report and a final evaluation. The plan is built by AI from your goals and data, or adjusted by you.
The app is intended for people aged 15 and over (16 and over in Slovakia). An account is personal, for one person.
3. Buying a programme
- The programme is a one-time in-app purchase through the App Store: one block = the measurement week (7 or 14 days) plus 12 programme weeks. Nothing renews automatically. You buy another block only if you want to, after finishing the previous one.
- You see the price in the app before buying. Apple is the seller and handles payment, taxes, receipts and refunds under its own terms (Apple Media Services Terms and Conditions). You can request a refund in the app (Profile → Purchases and receipts) or at reportaproblem.apple.com.
- The programme starts with the measurement week on the day of purchase if it is a Monday, otherwise on the next Monday. It runs until the Sunday of week 12.
- The paid block includes an AI plan for 12 weeks with adjustments based on weekly reports, weekly reports with an AI summary, check-ins, performance tests in weeks 0, 6 and 12, and a final evaluation.
- Without a purchase you see the plan outline, and Profile, consents, export and data deletion all work.
- Nothing gets locked after the programme ends: your plan, reports, photos and export stay available.
- A purchase belongs to one Delta12 account. On a new iPhone, use “Restore purchase”. Once you delete your account, the same purchase cannot be redeemed again.
4. The AI plan
The plan and proposed adjustments are created by a language model. They are proposals that you approve; the AI never changes an approved plan on its own. AI can make mistakes. Always adapt the plan to how you feel, and skip or modify any exercise that doesn't suit you.
5. Health and safety
Delta12 is not a medical device. It doesn't diagnose or treat anything and doesn't replace a doctor, physiotherapist or dietitian.
- If you have health problems or an injury, take medication, are pregnant, or are unsure whether the training load is right for you, talk to a doctor before starting the programme.
- If you feel chest pain, dizziness, shortness of breath, unusual pain or other problems, stop exercising immediately and seek medical help. In an emergency, call 112.
- You do the programme, tests and exercises at your own risk and within your own limits.
6. Acceptable use
Use the app only for yourself and in line with the law. Don't try to bypass purchase or data protection, interfere with our servers or misuse the app. We may block an account for a serious breach of these terms; your right to export and delete your data remains.
7. Your data and our content
Your data belongs to you. We use it only to provide the app, as described in the Privacy policy. The app, its texts, design and methodology belong to us; you are free to use your plan and reports for yourself.
8. Availability and changes
We work to keep the app reliable but cannot guarantee uninterrupted, error-free availability. We may improve and change features. This will not shorten a paid programme that is already running.
9. Liability
We are liable to the extent set by law. We are not liable for harm caused by using the plan contrary to section 5 or to your state of health. Nothing in these terms limits your statutory rights as a consumer.
10. Closing your account
You can delete your account and all data in the app at any time: Profile → Data → Delete everything. You can download everything first (Export everything). Deleting your account does not refund a purchased programme; refunds are decided by Apple.
11. Governing law and disputes
These terms are governed by the law of the Czech Republic. If you are a consumer, you keep the protection given to you by the law of your country of habitual residence. Please contact us by e-mail first with any complaint. Consumers can also use out-of-court dispute resolution with the Czech Trade Inspection Authority (adr.coi.cz).
12. Changes to these terms
We may change these terms; we will publish the new version on this page with its effective date. A material change to your disadvantage does not apply to a programme that is already running.