Systo · Last updated: October 23, 2026
Systo is a blood pressure logbook. We built it so your health numbers stay under your control.
If you use “Scan”, the photo of your monitor’s display is read on your device and is not stored or uploaded.
Only if you connect it, Systo writes your blood pressure and pulse readings to Apple Health. Systo does not read other health data. Health data is never used for advertising or shared with third parties.
We use Google Firebase Analytics to count anonymous usage events, such as screens opened, the paywall being shown and purchases. Firebase receives a random app-instance ID, device model, OS version and country. It never receives your readings, notes, tags, name or any Health data, and the data is not linked to your identity or used for advertising.
If you installed Systo after tapping an Apple Ads ad in the App Store, the app asks Apple's AdServices framework once which campaign led to the install and records the campaign, ad group and keyword ids with the usage analytics above. This only tells us which ads are worth running. It uses no advertising identifier (IDFA) and no tracking across apps; installs that didn't come from an ad record nothing.
Payments are processed by Apple. We use Adapty to check whether you have an active Systo Pro subscription; it receives an anonymous app user ID and your purchase status, not your health data.
Delete readings in the app, or delete the app. To remove iCloud data, go to Settings › [your name] › iCloud › Manage Storage › Systo.