🌞 Slather — Privacy Policy

Effective date: June 19, 2026

Slather is a sunscreen-reapplication reminder app. It reads the current UV index for your location, lets you pick an SPF, and reminds you when to reapply. This policy explains what the app does — and does not do — with your information.

The short version

Slather is built to need as little of your data as possible. There are no accounts, no analytics, no advertising, no tracking, and no third-party data collection. Slather has no servers of its own — your session history, settings, and reminders live on your device. The only piece of information that leaves your device is your location, which is sent to Apple's weather service so the app can look up your local UV index.

Information Slather uses

Location. With your permission, Slather reads your device's location and sends it to Apple WeatherKit to retrieve the current UV index for where you are. Your location is used only for this purpose, while you're using the app. It is not stored by the developer, not linked to your identity, and not used to track you. If you deny location access, the app simply can't look up your UV index.

Health data (optional, off by default). If — and only if — you turn on Settings → Apple Health → Sync to Apple Health, Slather writes a UV-exposure sample to the Apple Health app for each sun session you log. Slather never reads any data from Apple Health. These samples stay within Apple Health on your device (and your iCloud Health data, if enabled), under Apple's control — not the developer's. You can turn this off at any time, and delete the samples in the Health app.

On-device data. Your session history and app preferences (such as your default SPF) are stored locally on your device using Apple's standard storage (Core Data and UserDefaults). This information never leaves your device and is not transmitted to the developer or anyone else.

Notifications. Reapply reminders are local notifications scheduled on your device. They are not sent through any server and do not involve any personal data leaving your phone.

What Slather does not do

• It does not require an account or sign-in.
• It does not collect analytics or usage statistics.
• It does not contain advertising or ad-tracking.
• It does not track you across apps or websites.
• It does not include third-party SDKs that collect your data.
• It does not sell or share your personal information.

Third-party services

• Apple WeatherKit — receives your location to return UV and weather data. Governed by the Apple Privacy Policy.
• Apple Health (HealthKit) — stores the UV-exposure samples you opt to save, under Apple's control and your Health privacy settings.
• Apple TestFlight (beta only) — while Slather is distributed as a TestFlight beta, Apple may collect crash logs and basic usage information from the beta build to help diagnose problems, governed by Apple's privacy policy. The developer does not receive your personal information through this.

Data retention and deletion

Because your data is stored on your device, deleting the Slather app removes its session history and preferences from your device. UV-exposure samples written to Apple Health are managed in the Health app and are not deleted by removing Slather — you can remove them there at any time.

Permissions and your choices

You're always in control. You can grant or revoke Location, Notifications, and Health access at any time in the iOS Settings app (or, for Health, in the Health app under your profile → Apps). Turning a permission off may disable the related feature, but the app will continue to work for everything else.

Children's privacy

Slather does not knowingly collect personal information from anyone, including children. The app collects no personal data on the developer's behalf.

Changes to this policy

If this policy changes, the updated version will be posted at this address with a new effective date.

Contact

Questions about this policy or your privacy in Slather? Contact David Price at david@ddprice.com.