Kayzen app · Last updated: 26 August 2026
These terms govern the use of the Kayzen mobile app, published by Askmethat (ateixeira@askmethat.fr), hereafter "the Publisher". Installing or using the app means you accept these terms. If you do not accept them, do not install the app, or uninstall it.
Kayzen is a personal habit-tracking app that runs entirely on your device. It holds at most five habits in parallel, lets you set each a soft daily goal in minutes, mark the days you practised, pause a habit, and anchor it once it has become natural.
It requires no account, no connection and no subscription. It is provided free of charge.
The Publisher grants you a personal, non-exclusive, non-transferable and non-commercial right to use the app, for as long as it is installed on your devices.
You may not resell, rent or redistribute the app under your own name, or present it as your own.
Kayzen is a personal tracking tool. It is not a medical device and provides no diagnosis, and no medical, psychological or therapeutic advice. It is in no way a substitute for a healthcare professional.
By design, the app promises no result: it sets no performance target, measures no success and reports no failure. No guarantee of progress, wellbeing or behaviour change is given or implied.
Your habits are stored only in the app's private storage on your device. The Publisher has no access to them and holds no copy — see the privacy policy.
As a result, your data is not backed up. Uninstalling the app, clearing its storage, losing or changing device permanently destroys your habits. The Publisher can neither restore them nor be held liable for their loss.
The app, its name, its visual identity and its content belong to the Publisher, except for the third-party elements below, used under their respective licences:
The Publisher may change the app, alter its features, or stop distributing it, at any time and without notice. An app already installed keeps working on your device; no update is guaranteed.
The app is provided "as is", without warranty of any kind, express or implied, including fitness for a particular purpose or freedom from error. To the extent permitted by law, the Publisher is not liable for indirect damages arising from the use or inability to use the app, nor for the data loss described in article 5.
These limitations do not affect the rights French law grants to consumers and from which no derogation is possible.
These terms may be amended. The applicable version is the one published on this page, whose last-updated date appears at the top.
These terms are governed by French law. In the event of a dispute, an amicable solution will be sought first, by writing to ateixeira@askmethat.fr. Failing that, the dispute falls to the competent French courts. Consumers may also refer the matter free of charge to a consumer mediator.