Effective 10 November 2026
The short version. Denshin reads your band and keeps your training data on your own phone. The only information we collect on this site is the name, email and band model you choose to give us to request TestFlight access, and we use it only to send you an invite.
Your heart-rate data, sessions, rolls and tags are stored locally on your device. The beta has no account system and includes no advertising or tracking. If a later version adds optional sharing or sync, it will be opt-in and this page will say so first.
If you fill in the "Request a TestFlight invite" form, we collect the name and email address you enter, which band you wear, and the date of the request. We use them for one purpose: to contact you and send a TestFlight invitation to the beta, and to know which bands to support first. We don't sell this information or use it for advertising.
The site sets no advertising or analytics cookies. Our host keeps standard, short-lived server logs (such as IP addresses) to operate the site and prevent abuse.
Beta testing runs through Apple's TestFlight. When we send you an invite, your email address is processed by Apple to deliver the build and, while you test, Apple may collect usage and crash data as described in Apple's Privacy Policy. Installing the beta is your choice.
We keep your request only as long as the beta is running, then delete it. You can ask us to remove your details at any time: email privacy@denshin.app and we'll delete them.
Denshin isn't directed at children under 13, and we don't knowingly collect their information.
If this policy changes, we'll update this page and the effective date above.
Questions about privacy? Email privacy@denshin.app.