Velin is a running journal that only reads health data. There is no account, no advertising, no third-party analytics, and no developer-hosted server that receives your workouts. This policy explains when, why, and which data the app processes.
No servers of ours
Health caches and preferences stay on your iPhone; the memories you write sync to your own iCloud, which we cannot read.
Health data is read-only
Velin reads from Health and never writes to or modifies anything there.
No tracking
No ads, third-party analytics, crash SDKs, cross-app tracking, or developer telemetry.
1. Scope and controller
This policy applies to the Velin iOS app distributed through the App Store, together with the home screen widgets installed alongside it. The data controller is the individual developer identified on Velin's App Store product page, operating under the One Nexus Design brand (“we,” “us”).
Velin does not require an account and offers no sign-in. When you use Health, location, Apple Weather, Maps, or Photos, Apple separately processes the related data under its own policies.
2. How data is handled
“Process” includes reading, storing, organizing, displaying, and deleting data on your device, and transmitting only what a feature you requested requires. The items below follow the app's actual features.
Health and fitness data (read-only)
Once you grant access in Health, Velin reads the following to show your training history and condition analysis: running workouts (indoor and outdoor), running routes, heart rate and resting heart rate, step count, running distance, active energy, running speed, running power, vertical oscillation, ground contact time, and stride length.
Velin requests read-only authorization. It never writes to or modifies anything in Health, and it never sends this data to our servers — we do not operate any.
What it reads is cached locally for offline browsing, chart calculations, and widgets. You can adjust each type, or revoke everything, in Settings → Privacy & Security → Health → Velin.
Workout routes and maps
Outdoor routes come from route samples already stored in Health, not from location recording performed by Velin. Velin does not track your location in the background.
Route coordinates are used on device to draw route thumbnails and to compute elevation and pace distribution, and are cached in the app container. Drawing a map uses Apple Maps (MapKit), so Apple may receive the requests needed to render that area.
Velin does not upload your routes to us or to any third party. When you share a workout card, you decide before sharing whether it includes the route.
When you open an outdoor run’s detail view, Velin sends the first coordinate of that route to Apple’s geocoding service to show which city the run took place in. It is a one-off lookup used only for that view. This path is unrelated to the location permission used for home-screen weather — it reads a historical route already saved in Health.
Location and weather
Velin requests your location only when you view weather on the home screen and grant the iOS permission. The coordinates go to Apple Weather, through WeatherKit, to retrieve current conditions and a short forecast, and to Apple's geocoding service to produce a city name for display.
Apple states that WeatherKit uses location information only to provide weather, does not associate it with personally identifiable information, and does not track it between requests. Weather results are shown for that session; we hold no dataset as a result.
You can refuse or later revoke location access. Workout history, charts, and the rest of the app continue to work.
Photos, avatar, and workout memories
When you attach a memory photo to a run or set a profile avatar, Velin reads the images you explicitly select through the system photo picker. iOS presents the picker; Velin does not gain access to your whole photo library.
Memory photos are stored in the app container and sync to your own iCloud (see the next item). Your avatar is kept in app preferences, stays on this device, and can be replaced at any time.
You can delete memory photos in the app at any time.
Run memories and iCloud sync
The title, notes, and photos you attach to a run (“run memories”) sync to your own iCloud private database so they come back when you switch devices or reinstall. This is the only data in Velin that cannot be rebuilt — health data and caches can always be read again, but what you wrote is gone if it is lost.
That data lives under your Apple Account and we cannot read it: developers cannot see the contents of an iCloud private database. It never passes through our servers — we do not have any.
Only the following syncs: titles, notes, photos, and an irreversible fingerprint used to match a memory back to its run. The fingerprint is a one-way hash of that run's start and end times combined with a random key that belongs only to you; it cannot be turned back into when you ran or how long for. The health data itself, your routes, and the local cache never sync to iCloud.
Deleting Velin does not delete this copy from iCloud — it is restored when you reinstall. To remove it for good, go to Settings → (your Apple Account) → iCloud → Manage Account Storage, find Velin, and delete its data.
Nickname, goals, and preferences
Your nickname, yearly/quarterly/monthly/weekly goals, appearance mode, language, and chart and unit preferences are stored in app preferences on your device.
So home screen widgets can show current numbers, a small summary — such as the latest run's distance and time and your progress for the period — is written to the App Group container shared by the app and its widgets, which also lives on your device.
Sharing and external links
When you share a workout card, the system share sheet hands the image to the app you choose. Velin takes no part in what happens next.
The rating entry in Settings uses Apple's App Store review interface, and links such as Weibo or X open those sites. Your activity there is governed by their own policies.
Diagnostics and support
Velin integrates no third-party analytics, crash reporting, or advertising SDK, and has no feature that uploads usage data automatically.
If you contact us by email or through App Store support, we use the address, description, and screenshots you choose to provide to answer that request.
Never for advertising or profiling: the data above is not used for third-party ads, developer marketing, data brokerage, cross-app tracking, or user profiles. We do not sell or share your personal information.
3. External services
Velin uses only Apple's system services. They may record requests, IP addresses, or account activity under their own policies, and Apple is responsible for those retention periods and rights-request channels.
Apple Health (HealthKit)
Data stays on your device and is provided to Velin by the system according to the permissions you grant.
Apple Weather (WeatherKit)
Receives coordinates and request time, returns current conditions and forecast.
Apple Maps (MapKit)
Renders the map area behind route thumbnails and detail maps.
iCloud (CloudKit private database)
Holds your run memories (titles, notes, photos) under your Apple Account. Apple keeps the contents encrypted under your account; the developer cannot read them.
App Store and Photos
Handle distribution, the rating prompt, and photo selection through iOS and the App Store.
Velin includes no third-party advertising, analytics, or crash-reporting SDK, and no developer-hosted backend.
4. Storage, security, and retention
Local data
The health cache and your preferences live in the app sandbox and are removed when you delete Velin. The cache refreshes as the source data in Health changes; when the schema changes in an update, the old cache is discarded and rebuilt on the next sync rather than migrated.
Run memories are the exception. Titles, notes, and memory photos sync to your own iCloud, so that copy survives deleting the app and is restored when you reinstall. See “Run memories and iCloud sync” above for how to remove it.
Backups
If you use iCloud Backup or an encrypted computer backup, the contents of the app container may be included in that backup. The health cache is excluded: it is explicitly marked as not backed up, because it can be rebuilt from Health at any time and has no business sitting in your backup. Those backups are controlled by Apple and your backup settings, and we cannot read them.
Security measures
The app runs in the iOS sandbox, health access is controlled type-by-type by the system, and outbound requests happen only inside system frameworks such as Weather and Maps over HTTPS. No technical measure guarantees absolute security, so protect your iPhone and Apple Account as well.
5. Your choices and rights
- Health data: toggle each type, or turn everything off, in Settings → Privacy & Security → Health → Velin.
- Location: revoke access in Settings → Privacy & Security → Location Services → Velin.
- Photos: adjust the system photo permission; delete memory photos inside the app. Your avatar can be replaced at any time.
- Run memories in iCloud: remove them in Settings → (your Apple Account) → iCloud → Manage Account Storage → Velin, or turn off Velin’s sync in the system iCloud settings. Deleting the app does not remove the iCloud copy.
- Local data: delete a workout's notes and photos, or delete Velin to remove all local data.
- Access, correction, deletion, or complaints: contact us using the details below about support communications or other information we actually hold.
Because Velin has no accounts and no server holding your workout data, we generally cannot locate, export, or delete data on your device by email. Those actions need to be completed on the device itself.
6. Children
Velin is a general-purpose running journal and is not directed specifically to children. We do not serve age-based advertising and do not knowingly collect children's personal information through a developer-hosted service. Minors should use features involving health data and location with a guardian's guidance.
7. International processing
Velin itself transfers no data abroad. When you use weather or maps, Apple provides those services according to your account and service region and may process requests across its global infrastructure.
Review Apple's policies before using the related features. Any separate consent, notice, or transfer mechanism required by applicable law depends on the actual publishing entity, service deployment, and storefront at release.