Terms of Service

1. Scope

These terms apply to your use of Tahto, meaning the mobile app and this website. Tahto is the new name of the service previously offered as Cortex Athletics; renaming it does not change the content of these terms. The provider is Taskero UG (haftungsbeschränkt), Graben 2, 55116 Mainz, Germany, registered at Amtsgericht Mainz under HRB 54292 ("we").

By registering an account you agree to these terms. Deviating terms of the user do not apply, even if we do not expressly object to them.

2. What the service does

Tahto generates individual training plans using artificial intelligence. It supports strength training, running, cycling and HYROX, and adds nutrition analysis, a supplement plan and a coach chat you can use to adjust the plan. It works from your profile, your goals and the sessions you log.

The coach proposes changes to your plan. They only take effect once you confirm them. Ticking off a supplement is the one exception; it is saved immediately.

We keep developing the service and may change or discontinue individual features where that is reasonable for you and does not hollow out the core of the service. We announce material changes in advance, in the app or by email.

3. Your account

3.1 Registration

Using the service requires an account. You must be at least 16 years old. The details you provide must be accurate, and keeping them current is what makes the plans and targets fit you.

3.2 Credentials

Keep your credentials to yourself. If you suspect someone else is using your account, tell us straight away so we can lock it.

3.3 One account per person

The account is personal. It is not designed to be shared between several athletes, because the coach derives its recommendations from one person's training history.

4. How you may use the service

You agree not to use the service to

• break the law or infringe the rights of others,
• transmit unlawful, abusive or harmful content,
• disrupt operations, for example through automated bulk requests or load attacks,
• gain unauthorised access to systems or other people's accounts,
• impersonate someone else,
• reuse content from the service commercially without our consent.

The coach chat exists for questions about training, nutrition and planning. Attempts to manipulate the system or to make it produce content outside that purpose are not permitted.

Tahto is intended for personal use by a human. Access through scripts or other automated means is not permitted. To keep the service stable for everyone, we limit how many requests an account can make in a short time. These limits are speed limits, not volume quotas: normal use will not reach them, including on a plan without volume caps. If a limit is triggered, the app says so, and access resumes after a short wait.

5. Rights in content

5.1 Our content

The software, design, texts, exercise library and graphics of the service are protected by copyright. You receive a simple, non-transferable right to use the service for your own, non-commercial training.

5.2 Your content

Your data stays yours. That includes workout logs, meal photos, voice notes and profile details. You grant us the right to store and process this content as far as it is needed to deliver the service, in particular to generate plans and analyse what you enter. The privacy policy describes how that works in detail.

We do not use your content to train AI models.

6. Prices and subscriptions

Part of Tahto is free to use. The remaining features come in paid tiers you book as a subscription. The app shows you which features belong to which tier before you buy.

You buy subscriptions in the app through the App Store. Your contractual partner for the purchase is Apple (Apple Distribution International Ltd., Ireland). Apple handles the payment and issues the receipt. All we learn from Apple is which tier is active for you and until when. We never see your payment details. How we handle subscription data is described in the privacy policy.

The App Store shows you the price, the term, the renewal date and any free trial before you buy. After that the subscription renews automatically for the term you booked until you cancel it (section 8). If the price of a running subscription is to increase, the new price applies only once you agree to it.

The statutory right of withdrawal for the purchase is addressed to Apple, because the purchase contract is concluded with Apple. Apple informs you about it at the time of purchase and handles a withdrawal.

Without a subscription you keep using the free features unchanged. A subscription only comes about when you expressly buy it in the App Store. Nobody is moved into a paid contract silently.

7. AI content and health

7.1 How plans are produced

Training plans, nutrition analyses and chat replies are generated by AI models we run through Google Cloud Vertex AI in the EU multi-region. To do that we transmit the details each request needs, such as profile data, active injuries and recent sessions. AI output can be wrong or inappropriate, so judge for yourself whether a session suits your current level.

7.2 Not medical advice

Tahto is not a medical device and does not replace medical advice. The content is there for information and training planning. It is not a diagnosis, not a treatment and not dietary advice in a medical sense. Talk to a doctor before starting a training programme, in particular if you have existing conditions or injuries, are pregnant, or experience symptoms while training. You train on your own responsibility.

8. Term and termination

8.1 Your account

You can delete your account at any time in the app under "More", or write to contact@taskero.de. There is no notice period.

8.2 Your subscription

You cancel a subscription in your Apple account settings under "Subscriptions", not with us. The cancellation takes effect at the end of the current billing period. The booked features stay usable until then; after that you keep using the free ones.

Deleting your Tahto account does not end your subscription. Only your Apple account can cancel it, because that is where the purchase contract sits. If you delete the account without cancelling first, Apple keeps charging you. So cancel the subscription first and delete the account afterwards.

Refunds are handled by Apple. Contact Apple Support for those.

8.3 Termination by us

We may terminate the agreement with 14 days' notice, and may suspend an account without notice for serious breaches of section 4. Before an immediate suspension we will normally point out the breach, where that is possible and reasonable. While a paid subscription is running, our ordinary termination takes effect at the end of the paid period at the earliest.

After deletion your data is removed according to the privacy policy.

9. Warranty and liability

Statutory provisions apply to defects. We do not owe uninterrupted availability; maintenance windows and faults cannot be ruled out for a digital service.

We are liable without limitation for intent and gross negligence, and for damages arising from injury to life, body or health. For slight negligence we are liable only where an obligation is breached whose fulfilment makes proper performance of the contract possible in the first place and on whose observance you may rely (a cardinal obligation); in that case liability is limited to the foreseeable damage typical for this type of contract.

Liability under the German Product Liability Act and for breaches of data protection obligations under Art. 82 GDPR remains unaffected.

10. Changes to these terms

We may change these terms where there is an objective reason, such as a change in the law, new features, or the introduction of paid tiers. We announce changes at least 30 days in advance by email or in the app.

If you do not object before the change takes effect, the amended terms are deemed accepted. We point this out separately in the announcement. If you do object, either side may end the agreement.

11. Final provisions

German law applies, excluding the UN Convention on Contracts for the International Sale of Goods. If you are a consumer habitually resident in the EU, the mandatory consumer protection rules of your country of residence remain unaffected.

The place of jurisdiction is Mainz where you are a merchant, a legal entity under public law or a special fund under public law, or have no general place of jurisdiction in Germany.

We are neither willing nor obliged to take part in dispute resolution proceedings before a consumer arbitration board (§ 36 VSBG).

Should a provision be invalid, the rest of the agreement stays in force and the statutory rule takes the place of the invalid provision.

This English text is a courtesy translation. In case of any discrepancy, the German version applies.

12. Contact

Taskero UG (haftungsbeschränkt), Graben 2, 55116 Mainz, Germany, contact@taskero.de. Further mandatory details are in the imprint.