Your workouts stay yours.

Personal Bests has no servers, no accounts and no analytics. Your workouts are analysed on your device, and the results are stored only on your devices and in your own iCloud, which you can switch off.

Last updated: 10 October 2026

No account and nothing to sign up for
No analytics, no ads, no tracking
Everything is analysed on your device, including AI-written summaries
Read-only access to Apple Health: nothing is ever written or deleted there
Optional sync through your own private iCloud, which I can’t access

What the app reads from Apple Health

With your permission, Personal Bests reads:

your workouts: their type, date, duration and distance
their GPS routes, to calculate segments and draw maps
the distance recorded during them (walking and running, cycling, swimming and wheelchair distance)

You choose what to allow when the app asks, and you can change it at any time in Settings → Privacy & Security → Health → Personal Bests. The app never writes to or deletes anything in Apple Health, and your Health data is never used for advertising or shared with anyone.

What stays on your device

Everything Personal Bests works out — segment times, rankings and medals — is calculated on your iPhone and stored there. GPS routes and maps are read from Apple Health when you open a workout and never leave your iPhone, not even through iCloud.

Notifications about new personal bests are created on your iPhone. Widgets read their data from storage shared between the app and its widgets on the same device.

iCloud sync and backup

While iCloud sync is on (it is by default), Personal Bests keeps a copy of its results in the private iCloud database of your Apple Account. That copy lets you restore your data after reinstalling or on a new iPhone, and shows your results on your iPad and Mac. It contains:

a summary of each workout: its type, start time and time zone, duration, distance, and whether it took place indoors, outdoors or in a pool
your segment times, rankings and medals
your settings, including your segments, timeframes, crops and hidden workouts
the name of the device that made the most recent backup

It doesn’t contain GPS routes, locations or any other Health data.

Apple stores this data under Apple’s Privacy Policy. Because it’s in your private database, only you can access it; I can’t see it.

To stop syncing, open Settings → iCloud Sync in the app on your iPhone and turn off Sync to iCloud. This also deletes the copy from iCloud. Data on your iPhone and in Apple Health isn’t affected.

Apple Intelligence

Workout summaries and the “While you were away” recap can be written by Apple Intelligence. This uses Apple’s on-device language model, so nothing is sent to Apple or anyone else to write them.

Crash reports and statistics

The app contains no analytics or tracking code. If you’ve chosen to share analytics with app developers in your device’s settings, Apple may give me anonymous crash reports and usage statistics. They don’t identify you, and you can turn this off at any time in Settings → Privacy & Security → Analytics & Improvements.

This website

This website doesn’t use cookies or analytics. It’s hosted on GitHub Pages, which processes your IP address to deliver the pages (see GitHub’s privacy statement). Everything else, fonts included, comes from this site itself; no other service is involved.

Changes to this policy

If the way Personal Bests handles data changes, I’ll update this page and the date at the top.

Who’s responsible

Personal Bests is made by Markus Kettner, an independent developer. Because the app never sends your data to me, there’s nothing I could look up, export or delete for you: everything lives on your devices and in your own iCloud, where you can delete it at any time (see iCloud sync and backup).