Privacy Policy

Last updated: 4 November 2026

Wick reads health and fitness data to estimate your body clock, your recovery and your training load. Health data is about as personal as data gets, so this document is specific about where yours goes.

Short version

• Wick collects nothing. No accounts, no sign-in, no analytics, no crash reporting, no advertising, no tracking across other apps.
• Wick has no server of its own. The only thing it fetches is map imagery from Apple Maps, and only while the walking map is open.
• Your health data is read from Apple Health on your device, used on your device, and never leaves it.
• Health data is never used for advertising, never sold, and never shared with anyone.
• The one-off purchase is handled by Apple's App Store. Wick never sees your payment details.

Health data Wick reads

With your permission, and only the categories you allow, Wick reads from Apple Health: sleep, resting heart rate, heart-rate variability, breathing rate, blood oxygen, wrist temperature during sleep, one-minute heart-rate recovery, time in daylight, active energy, steps, body mass, VO₂ max, workouts, and your date of birth and biological sex where you have recorded them. Age and sex are used only to pick sensible reference ranges for the heart signals.

You can grant or revoke any of these at any time in Health → Sharing → Apps → Wick. Wick works with whatever it is given and says less where a signal is missing.

Health data Wick writes

Only what you ask it to. When you save a workout in Wick it writes that workout to Health, with its active energy and the effort rating you gave it, so your other apps see the same training you do. It writes nothing else, and it never writes data it has not measured or that you have not entered.

What stays on your device

Stored locally, using the operating system's standard app storage and a shared container for the widgets and the watch app:

• Your workout log, exercise templates and training history
• Your settings — sleep target, ideal middle of the night, daylight goal, notification choices, theme
• A small snapshot of your latest figures so widgets and complications can draw without opening the app
• Your purchase status

If you delete the app, this is removed with it. Your Health data belongs to Health and is unaffected.

Location, and the walking map

Wick has a walking game: embers are scattered within a kilometre of you and you collect them on foot. To draw that map and point you at them, the app asks for your location while you are using it.

A walk is something you start and something you end. While one is running, and only then, Wick keeps receiving your location with the phone in your pocket and the screen off, so the embers you walk past are actually collected. iOS shows a blue indicator at the top of the screen the whole time this is happening. Wick does not ask for “Always” access and cannot see where you are when you have not started a walk. Ending the walk stops it immediately; so does closing the app.

Your position is read on your device and used on your device, during a walk as much as outside one. Wick does not store your location, does not keep a history of where you have been, and has nowhere to send it. What the app records when you collect an ember is that an ember with a particular identifier was collected — not where you were standing.

While a walk is running, the distance to the nearest ember appears on your lock screen and in the Dynamic Island. That is drawn on your device from the same reading; nothing about it is sent anywhere.

The map itself is Apple Maps. Drawing it means your device asks Apple for map imagery for the area you are looking at, which is a request to Apple and is handled under Apple's privacy policy. Wick does not see, receive or keep anything from it. The same applies on Apple Watch, which uses its own location to point you at the nearest ember.

What is sent over the network

Map imagery, and nothing else. Wick contains no analytics SDK, no crash reporter, no advertising SDK, no remote configuration and no sync service of its own. Every other screen in the app works with the device in aeroplane mode.

Purchases

Wick is free for thirty days and then offers one non-consumable in-app purchase, which unlocks the body clock, jet-lag plans and the training analysis. The transaction is handled entirely by Apple through the App Store. Wick receives only a confirmation from the operating system that the purchase is owned by the Apple Account signed in on the device; it never sees your name, your payment details or your Apple Account.

Notifications

If you allow them, Wick schedules local notifications on your device — when your peak window opens, when it is time to dim the lights. They are built and delivered on the device. No push server is involved and nothing is sent anywhere to produce them.

Third-party services

None. Wick includes no third-party SDKs of any kind. Apple Maps and Game Center are Apple's own services, built into the operating system, and are described above.

Children

Wick does not knowingly target or collect data from children under 13. Since the app collects no data from anyone, it collects none from children either.

Game Center

The ember leaderboard is run by Apple's Game Center. If you sign in to it, Wick submits one number: the embers you have earned in the last seven days. It sends nothing else, and it never sends your location, your health data or anything about your training. Game Center is Apple's service and your use of it is covered by Apple's privacy policy. You can ignore it entirely and the rest of the app is unaffected.

Permissions

Wick asks for Health access, your location while you are using the walking map, and, optionally, notifications. It does not request background location, contacts, photos, camera, microphone or App Tracking Transparency.

Changes to this policy

If this policy changes, the updated version will be published at the same URL where you are reading it, and the "Last updated" date above will change.

Contact

Questions about this policy: harryattenborough@gmail.com.