Flex Privacy Policy

Effective 2026-10-30 (Apple Watch and Health added; the 2026-09-05 policy otherwise unchanged).

Flex is developed by FlexKey LLC (“we”). Flex does not sell, share or analyze your personal data, and it contains no advertising or analytics SDKs.

What the app stores

Sign in with Apple. When you sign in, Apple gives Flex a stable user identifier and, on the first sign-in only, the name and email address you chose to share. Flex keeps these in your iCloud key-value store so the app can recognise you on your other devices. You can hide your real email address from Flex using Apple’s “Hide My Email” option.
Workout data. Workouts, sets, templates, folders and custom exercises are stored on your device and synced through the private CloudKit database of your iCloud account. This data is encrypted by Apple and is not accessible to us.
Preferences. Your display name, weekly and daily goals and theme are stored in your iCloud key-value store and on the device.
Apple Watch. Flex on your watch holds a copy of your templates, your last weights and the workout you are doing, sent from your iPhone over Apple’s Watch Connectivity. A workout you finish on the watch is sent back to your iPhone and stored as above. Nothing leaves your devices.

When you run a workout from your Apple Watch, Flex asks for permission to use Apple Health. With your permission:

What Flex reads: your heart rate and active energy during that workout, to show them while you lift and in the workout summary.
What Flex writes: the workout itself (a strength-training workout with its start and end time), so it counts toward your activity like any other workout.
Where it stays: in Apple Health on your devices and in the workout summary on your watch. Flex does not copy Health data to its own storage, does not sync it through CloudKit, and has no servers to send it to.
Your control: you can decline, and Flex still logs your sets without heart rate or calories. You can change the permission at any time in the Health app ▸ Sharing ▸ Apps ▸ Flex, and delete the workouts Flex wrote from the Health app.

Delete your data. Delete workouts from History, or remove the app’s iCloud data in iOS Settings ▸ your name ▸ iCloud ▸ Manage Account Storage ▸ Flex. Signing out in Flex clears the sign-in details from iCloud.
Stop using Sign in with Apple. In iOS Settings ▸ your name ▸ Sign in with Apple ▸ Flex you can stop using your Apple ID with the app.

Flex is intended for people aged 18 and over, as described in the Terms of Service inside the app.

We will update this page and the effective date when the policy changes.

Questions about privacy: open an issue on this repository (https://github.com/kevinbrowncodes/flex-support/issues).