Violet

Health data & privacy

Last updated: 5 October 2026

Violet reads health data from Apple Health or Health Connect and keeps it on your phone. This page is the full disclosure: what it reads, why, how long it stays, where it goes, and what you can ask for.

What is processed

• Read from Apple Health or Health Connect: step count, heart rate, sleep records, water intake, and body weight.
• For the night you are viewing, additionally: heart rate variability (HRV), respiratory rate, and blood oxygen saturation.
• Entered by you: the water you log in the app. That is the only value written back to the health store; nothing Violet reads is ever written back.
• Entered by you, and kept on this device only: your weight, if you choose to give it in Settings. It scales the walking-energy estimate on the Steps screen. Violet asks for it only when your health store does not already have it, and it is never written back to the health store or sent anywhere.
• Chosen by you, and kept on this device only: your reminder settings — which reminders are on, how often, and the earliest and latest hour. Violet 1.2.0 can remind you to drink water and to move; both reminders are off until you turn them on. Reminders are on iOS only.

Why

To show your daily progress, and to chart the selected night's measurements alongside the app's own sleep estimate.

If you turn a reminder on, Violet also works out when to remind you. It does that on your device, from data already there: the water you logged, your step data, your water goal, your reminder settings, and whether your trial or subscription is active.

The data is not used for advertising, profiling, scoring, or sale to third parties. No such processing takes place.

Lawful basis

Health data is special-category personal data under data protection law, so processing it needs a specific condition rather than a general one. That condition here is your explicit consent.

You give that consent through your operating system's own health permission prompt — not by installing the app, and not by reading this page — and you choose which categories it covers. You can withdraw it at any time; see Withdrawing permission below. Violet reads nothing before you grant it and nothing after you revoke it.

Beyond that, there is little for us to justify: the data stays in a database on your device, we hold no copy of it, and we have no means of reaching it.

Your subscription is different data on a different basis. The purchase record exists so we can give you what you paid for — the performance of that contract — not because you consented to it. It is ended by cancelling the subscription rather than by withdrawing a permission.

Where it is kept

• In a database on your device only. Violet has no server, and this data is not sent to one.
• Reminders are local notifications: Violet schedules them on your device with iOS. There is no push notification service, no push token and no server, and nothing is sent anywhere to deliver them.
• The app contains no analytics or crash-reporting tooling.
• That database is included in your device's own backup (iCloud or Google). You can prevent this by turning device backup off; the backup itself is governed by Apple's or Google's terms, not ours.

How long

• Overnight measurements (HRV, respiratory rate, blood oxygen) are kept for 90 days, then deleted automatically.
• Steps, heart rate, sleep and water live primarily in Apple Health or Health Connect; Violet keeps only the copy it needs to display them.
• A weight you typed is kept until you change it or erase your data. It is not aged out, because it is not a measurement of a day — it describes you.

Transfers

Your health data is not transferred to any third party, in any country.

If you buy a subscription, the purchase itself is handled by Apple or Google, and the subscription record is processed by RevenueCat acting as our processor. RevenueCat receives the purchase and an anonymous app identifier. It receives none of your health data.

Your rights

Data protection law gives you the right to ask whether your data is processed, to be told what it is used for and whether it is used accordingly, to have it corrected if it is incomplete or wrong, to have it erased, and to object to the processing.

• Erasure is built in. "Delete local health data" in the app's Settings removes every health record Violet holds on your device — including a weight you typed. Your settings are kept — goal targets, language, reminder settings and the order of your Today cards — along with a few records of choices you already made, such as having acknowledged the privacy notice, so the app still opens the way you left it. Your trial or subscription status and the anonymous app identifier are kept too. That action always works.
• Deleting the app also removes the on-device database. On iOS, your trial or subscription status and the anonymous app identifier are kept in the device's Keychain, which iOS does not clear when an app is deleted; if you install Violet again, it discards the old identifier and creates a new one, and the trial does not start over.
• For anything else, email admin@gladve.com.

Withdrawing permission

You can withdraw the permission at any time — on iOS via Settings → Privacy & Security → Health → Violet, on Android via the Health Connect app's permissions section. Once withdrawn, Violet cannot read new data.

Notifications are a separate permission. iOS asks for it the first time you turn a reminder on. You can turn reminders off in Violet's Settings, or withdraw the permission in iOS Settings, at any time.

Data controller

Kaan Dönmez, trading as Gladve. Contact: admin@gladve.com.

Children

Violet is not directed at children under 13 and we do not knowingly process their data.

Changes

If this policy changes materially, the date at the top changes and the app links to the updated version. Previous versions are available on request.