Terms of use

A personal app for keeping your days, habits, health, money and thoughts in one place, with an assistant that thinks along.

The app is built and run by Mike Griffioen. Participation is by invitation and can be withdrawn.

This is the most important point on this page. LifestyleOS shows insights about your sleep, recovery, nutrition, training and money, and Echo talks with you about them. That is general information, not advice from a doctor, dietitian, therapist or financial adviser.

Do not use it to diagnose a condition, choose a treatment, or decide whether to invest in something. If you are worried about your health, see a doctor. If you take medication, are pregnant or have a medical condition, check with a professional before changing your diet or training.

The AI parts generate text. They can state something confidently that is wrong. Verify what matters.

The app is under development. Features may change or disappear, there may be outages, and data may be lost.

There is no commitment about availability and no recovery time for problems. Export anything you really cannot afford to lose: you can do that under Settings.

Use your own account and do not share your access. Do not put other people's data in it when you are not allowed to, someone else's mailbox, for example.

Do not use the app for anything unlawful, and do not try to circumvent its security or usage limits. The AI features cost money per use; firing them automatically or reselling them is not allowed.

What you put in the app stays yours. No ownership is claimed over your notes, your data or what you discuss with Echo.

The app itself (the code, the design, the texts) belongs to its maker. Nutrition data comes partly from the NEVO table by RIVM and from Open Food Facts; those carry their own terms, and attribution is shown in the app.

The app is provided as it is, without warranties. Liability for damage arising from its use is excluded as far as the law allows. That does not apply in cases of intent or conscious recklessness.

This is a free test version without paid services; do not expect a service level with it.

Echo is software. Wherever you talk to Echo, use the voice mode or read a text the app produced, that was generated by a language model and not by a person. You should be told that, and it is also what article 50 of the European AI Act (2024/1689) asks of a provider.

Answers can be wrong, even when they sound certain. Use them as a starting point, not as a verdict.

If you are a consumer, you keep the rights the law gives you; nothing in these terms takes those away. For digital services they are in book 7 of the Dutch Civil Code, which implements European directive 2019/770: what you get must do what can reasonably be expected of it, and if it does not work, you are entitled to have it put right.

As long as LifestyleOS is free, there is nothing to withdraw from. If a paid subscription arrives, the fourteen-day right of withdrawal applies to it (article 6:230o of the Dutch Civil Code), unless you expressly ask to start immediately and agree that you give up that right by doing so.

You can stop at any time and delete your account in the app. That is irreversible.

I may end access when the test phase finishes or if someone does not keep to these terms. You will be given the opportunity to export your data, unless circumstances genuinely make that impossible.

These terms may change. In case of a material change you will be asked to agree again.

Dutch law applies to these terms.

Disputes go to the competent court in the Netherlands; if you are a consumer living in another EU country, you may also go to the court of your place of residence. For a dispute about an online service you can also use the European ODR platform.