Privacy Policy

Last updated: 2026-08-27

What Vialo stores

The compounds you add, the doses you log with their injection sites and notes, your weight entries, and any side effects you record. It also stores your settings, such as your name, weight unit and reminder times.

Where it is stored

On your device only, inside the app's private storage. Vialo has no backend server and no account system, so your protocol data is never transmitted anywhere. If you back up your device to iCloud, your device backup may include the app's data — that backup is governed by Apple's privacy policy, not this one.

Health data

If you turn on Apple Health, Vialo reads body-mass (weight) samples so your trend stays current, and writes the weights you log back to Health. That exchange happens entirely on your device between Vialo and Apple Health. Vialo never sends health data off the device, never uses it for advertising or marketing, and never shares or sells it to third parties. You can revoke access at any time in the Health app, and turning the toggle off in Vialo stops all reading and writing immediately.

What Vialo does not collect

No account, no email address, no advertising identifiers, no analytics or crash-reporting SDKs, no location, and no tracking across apps or websites.

Third parties

If you buy Pro, the purchase is processed by Apple and handled through RevenueCat, which manages the subscription receipt. Neither receives your protocol or health data — only the anonymous purchase information needed to know whether Pro is active. This website is served from a plain static host and sets no cookies.

Children

Vialo is not directed at children and is not intended for anyone under 18.

Your control

Because the data lives only on your device, you control it directly: delete an entry inside the app, or delete the app to remove all of it. There is nothing on a server for me to delete on your behalf, and no export request to make.

Changes and contact

If this policy changes, the updated date above changes with it. Questions are welcome at the contact address below.