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Interval Timer

Terms of Use

Last updated: 5 September 2026 (the app was renamed from HIIT Timer to Interval Timer; nothing else changed)

These terms cover the Interval Timer Android app (formerly HIIT Timer), one of the products built by R-Think Pty Ltd, an Adelaide venture studio. They govern your use of the app and nothing else: the terms for the rthink.co website are a separate agreement about that website and do not apply to Interval Timer. How the app handles data is described in the Interval Timer Privacy Policy.

The short version

Interval Timer is an interval timer. It counts intervals and plays a sound at the boundaries. It is not a coach, not a medical device, and it does not know anything about your body or whether an exercise is safe for you. Exercise is risky, and that risk is yours. Everything below says that more carefully, and sets out what you can and cannot expect from the app.

Nothing in these terms takes away rights you have under the Australian Consumer Law. Where those rights apply, they win over anything written here.

1. Who you are dealing with

The app is published by R-Think Pty Ltd ("R-Think", "we", "us"), an Australian company based in Adelaide, South Australia. You can reach us at support@rthink.co.

By installing or using Interval Timer you agree to these terms. If you do not agree, do not use the app.

2. Who may use the app

You must be at least 13 years old to use Interval Timer.

If you are under 18, you may only use the app with the consent and supervision of a parent or guardian, and that parent or guardian agrees to these terms on your behalf and is responsible for your use of the app, including any purchase made through it.

If you buy Pro, you confirm you are at least 18 and are authorised to use the payment method held by the Google account making the purchase.

3. What the app is, and what it is not

Interval Timer counts down intervals you configure and plays an audible or haptic cue when an interval changes. That is the whole of what it does.

It is not:

The workout names, exercise labels and starter workouts included in the app are examples of how to use a timer, not recommendations that you perform them. Choosing what to do, how hard to do it, and whether to do it at all, is entirely your decision.

4. Health, safety, and your assumption of risk

Exercise carries a genuine risk of serious injury or death. High-intensity interval training carries more of it than most.

You use Interval Timer, and you exercise, at your own risk.

5. Not a medical device

Interval Timer is not intended to diagnose, monitor, treat, cure, prevent or alleviate any disease, injury or condition, and it is not supplied for any therapeutic purpose. It is a general fitness and wellbeing tool. It is not included in the Australian Register of Therapeutic Goods and is not supplied as a medical device under the Therapeutic Goods Act 1989 (Cth).

6. Cues depend on your device, not on us

The app asks Android to play a sound at a moment in time. Whether that sound actually reaches your ears is decided by your device, not by us. Cues can be delayed, quietened or suppressed entirely by, among other things:

We build the app to make delivery as reliable as we can, and we test it on physical hardware before we ship. We do not promise that every cue will arrive, or arrive on time, on every device in every configuration.

Do not rely on Interval Timer in any situation where a missed, delayed or inaudible cue could cause harm — including anything involving heavy weights, water, heights, machinery, or a medical need to stop at a particular time. Use a second, independent method of keeping time wherever the consequences of a missed cue would be serious.

7. Your licence to use the app

We grant you a personal, non-exclusive, non-transferable, revocable licence to use Interval Timer on devices you control, for your own use. You must not sell, rent, sublicense or redistribute the app, remove or obscure any notices in it, or attempt to derive its source code, except to the extent that a law expressly permits you to do so despite this clause.

We own the app, its name, its design and its content. Nothing in these terms transfers any of that to you.

8. Purchases and Pro

Pro is optional, and the app is fully usable without it.

R-Think operates no purchase server and holds no record of who you are. If your entitlement is lost, the app's Restore function asks Google Play whether this account owns Pro.

9. Your workouts and your data

Your workouts, history and settings are stored on your device. We cannot see them, cannot recover them, and do not back them up. If you uninstall the app, clear its data, or lose the device, that content is gone. Keep your own record of anything you care about.

You are responsible for the text you type into the app and for anything you choose to share out of it. How the app handles data is described in the Privacy Policy.

10. Feedback

If you send us an idea, suggestion, bug report or other feedback, we may use it for any purpose, without restriction, payment or attribution, and without it creating any obligation to you. Please do not send us anything you consider confidential or that you do not have the right to share.

11. Changes and availability

We may update, change, suspend or discontinue the app or any of its features, and we may stop distributing it. We will not remove a feature you have already paid for during a period you have paid for, except where we must for legal or safety reasons.

12. Suspension and termination

Your licence ends automatically if you materially breach these terms. We may also suspend or end your access where we reasonably believe it is necessary to comply with the law, to protect other people, or to prevent fraud or abuse of a purchase or refund process.

You can end these terms at any time by uninstalling the app. Cancelling a subscription is done through Google Play. Clauses 4, 5, 6, 7, 10 and 13 to 18 survive the end of these terms.

13. Australian Consumer Law

Our goods and services come with guarantees that cannot be excluded under the Australian Consumer Law. Nothing in these terms excludes, restricts or modifies any guarantee, right or remedy you have under the Australian Consumer Law, or under any other law, where doing so would be unlawful.

If you are a consumer under the Australian Consumer Law, you may be entitled to a repair, replacement or refund for a major failure, and to compensation for any other reasonably foreseeable loss or damage. Those rights sit alongside these terms and are not reduced by them.

Clause 14 applies only to the extent the law allows it to.

14. Liability

To the maximum extent permitted by law, and subject to clauses 13 and 15:

15. Limits the law sets on clause 14

Nothing in these terms excludes, restricts or limits any liability, right or remedy where doing so would be unlawful. Where a limitation in clause 14 cannot lawfully apply, it simply does not apply, and the rest of these terms continue in force.

16. If part of these terms does not hold

If any part of these terms is found to be void, unenforceable or unlawful, that part is severed to the minimum extent necessary and the rest of the terms continue to apply with full force.

17. General

These terms, together with the Privacy Policy, are the entire agreement between you and R-Think about the app, and replace anything said or written before them on the same subject. Google Play's own terms govern the purchase transaction and your relationship with Google.

We may transfer our rights and obligations under these terms to another entity, for example if the app or our business is sold, without reducing your rights under them. You may not transfer yours without our written consent.

If we do not enforce a term straight away, we do not lose the right to enforce it later.

18. Governing law

These terms are governed by the laws of South Australia. You and we submit to the non-exclusive jurisdiction of the courts of South Australia and the courts able to hear appeals from them. Nothing in this clause prevents you from bringing a claim in a court or tribunal that a law entitles you to use.

19. Changes to these terms

We may update these terms. The current version always lives at rthink.co/hiit-timer/terms, and the "last updated" date at the top tells you when it last changed. Continuing to use the app after a change means you accept the updated terms. If a change materially reduces what you get, you can stop using the app and cancel any subscription through Google Play.

20. Contact

support@rthink.co