Legal
Terms of Service
Last updated July 16, 2026
These are written in plain language. By using ChronoPersona you agree to them; if anything is unclear, ask us.
A young product
ChronoPersona is young, so features may change, improve, or occasionally misbehave while we settle things. Two things stay put: your data stays yours (on your device, with an optional account backup only you can read; see the Privacy policy), and we will never quietly take away something you already rely on.
Educational, not medical
ChronoPersona maps well-studied circadian and ultradian rhythms for planning your day. It is educational and never diagnoses, treats, or replaces professional care. Do not use it to make medical decisions. For sleep disorders or health concerns, see a clinician.
Fair use
Use the app for yourself, don't attack or abuse the service, don't misrepresent it as medical software, and don't resell it as your own. That's the whole list.
Paid plans
The Pro plan is published at /pricing ($4.99/mo or $39/yr). Billing runs through Stripe; we never see your card. You can cancel anytime from the billing portal and keep Pro until the period you paid for ends, and the first 14 days carry a full refund, no questions asked. If prices ever change, existing subscribers hear about it first and in plain language.
What we promise
We build this carefully and we won't oversell it. The service is provided as-is: we don't warrant it will be uninterrupted or error-free, and to the extent the law allows, we aren't liable for losses arising from its use. A signed-in account keeps your data backed up; a file export (the Export button in the Your-data row) is still the habit we recommend, because a file you hold answers to nobody.
Changes
If these terms change in a way that matters, we'll say so plainly on this page with a new date at the top. No silent edits.