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The agreement

Terms of Use

Effective date: October 6, 2026
Last updated: October 6, 2026

1. Agreement

These Terms of Use (“Terms”) are an agreement between you and Y1 Engineering, LLC, an Illinois limited liability company (“Y1 Engineering,” “we,” “us,” or “our”). They cover the Sabai Replay mobile app (the “App”) and this website (together, the “Services”). Sabai Replay is a product of Y1 Engineering, LLC.

By using the App, you accept these Terms. If you do not agree, do not use the App.

You must be at least 13 years old to use the App. If you are under 18, or under the age of majority where you live, you may use the App only with the permission of a parent or guardian, who also agrees to these Terms for you.

Our Privacy Policy explains how we handle information.

2. Licence and ownership

We grant you a limited, non-exclusive, non-transferable, revocable licence to use the App for your own personal training, under these Terms.

We own the App, its design and content, and the Sabai Replay name and marks. These Terms do not give you any right to them beyond this licence.

3. Subscriptions

The Sabai Replay subscription is an auto-renewable subscription sold by Apple through the App Store. The price, the billing period, and any free trial are shown on the purchase screen before you buy, in your local currency. The terms shown there are the subscription you agree to.

Renewal and cancellation. Payment is charged to your Apple ID when you confirm the purchase. A subscription renews automatically unless you cancel it at least 24 hours before the end of the current period. Your account is charged for renewal within the 24 hours before that period ends. You manage or cancel a subscription in your Apple ID settings. Deleting the App, or deleting your account, does not cancel a subscription.

Free trials. Any free trial is shown on the purchase screen, and only if your Apple ID can still use it. If you buy a subscription while a free trial is running, the unused part of the trial ends when the purchase goes through.

Refunds. Refunds are handled by Apple under Apple’s refund policies.

Promotional pricing. We may offer promotional pricing, including a limited-time founding rate. Its terms are shown on the offer screen. We may change or end any offer at any time. The renewal and cancellation terms above apply to promotional subscriptions too.

Price changes. We may change subscription prices. Apple will tell you before a change applies to you and, where required, ask for your agreement.

4. Unlock codes

We may give out codes that unlock the App’s paid features without a subscription. A code is personal to the person we gave it to. It cannot be sold or transferred, has no cash value, and may expire. We may revoke a code, and the access it gave, at any time.

5. Training and injury

Train at your own risk. Combat sports carry a risk of injury. You are responsible for how you train, where you train, and whether you should be training at all.

Check with a doctor before you start, and before you continue if you have an injury, a medical condition, or any doubt about whether this kind of training is safe for you.

Sabai Replay is a timer and a camera. It is not coaching, and it is not medical advice. It shows what it recorded: rounds, combos, and time. It does not grade your technique, and nothing in the App is a promise that you will improve, avoid injury, or train safely.

Set the phone up somewhere safe, out of the training area. You are responsible for keeping the device, its mount, and anyone nearby clear of strikes, partners, and anything else that moves during a session.

6. Filming other people

Footage from a training session often includes other people. You are responsible for getting their consent before you film them, and for following your gym’s rules on cameras. Do not record anyone who has not agreed to be filmed, or anywhere the gym, the venue, or the law does not allow cameras.

You are also responsible for what you do with footage after you record it, including sharing it.

7. Your content

You own your footage. The videos, audio, and session details you create in the App stay on your device. We do not receive them, and we take no rights in them.

If you export or share footage, that sharing is yours. It does not give us any rights.

8. Acceptable use

You agree that you will not:

9. No warranty

The App is provided “as is” and “as available.” To the fullest extent the law allows, we disclaim all warranties, express or implied, including warranties of accuracy, fitness for a particular purpose, and non-infringement.

Combo detection can miss a combo or cut one short. Timers, recordings, and playback can fail. We do not promise that the App will work without interruption, that footage will be complete, or that anything the App measures will be correct.

10. Limitation of liability

To the fullest extent the law allows:

Nothing in these Terms limits liability that cannot legally be limited, including liability for death or personal injury caused by our negligence where the law does not allow that limit.

11. Indemnity

You agree to cover our reasonable losses and costs, including legal fees, from any claim by someone else arising from your training, your footage of other people, or your breach of these Terms.

12. Ending accounts

You can delete your account at any time from the You tab, under Delete account. Deleting your account removes the account, and the sessions, videos, and clips stored on that phone. It does not cancel a subscription or issue a refund; cancel the subscription in your Apple ID settings.

We may suspend or end an account that breaks these Terms, and we may stop offering the App. Ending an account does not by itself cancel an Apple subscription.

13. Apple

If you got the App from the Apple App Store, these terms also apply:

14. Governing law and disputes

These Terms are governed by the laws of the State of Illinois, without regard to its conflict-of-law rules.

If you have a dispute with us, email support@sabaireplay.app first, and we will try to resolve it with you. If we cannot, the dispute will be decided in the state or federal courts located in Sangamon County, Illinois, and you and Y1 Engineering consent to those courts’ jurisdiction.

15. General

If any part of these Terms is found unenforceable, the rest stays in effect. These Terms, together with our Privacy Policy, are the whole agreement between you and us about the Services. If we do not enforce a part of these Terms, we have not given up the right to enforce it later. You may not transfer these Terms to anyone else. We may transfer them, for example to a company that takes over the App.

16. Changes

We may update these Terms. When we do, we will change the “Last updated” date above, and we will tell you in the App if a change is significant. If you keep using the App after an update, you accept the updated Terms. If you do not agree, stop using the App and delete your account.

17. Contact

Questions, complaints, or claims about the App or these Terms:

Y1 Engineering, LLC
support@sabaireplay.app