# MSCLS — Private Gym & Strength Tracker for iPhone

> A beautifully crafted, on-device gym and strength tracking app for iPhone. No accounts, no personal data collected. Privacy at its core.

MSCLS is an iOS app for logging strength training workouts. It is built with Apple's native design language and follows Apple Human Interface Guidelines. All workout data stays on your device — there are no accounts and no personal data collection. The app collects a small set of anonymous usage events (e.g. tutorial completion) via PostHog (EU region) to help improve the app; no personal data is included and users can opt out in Settings. If iCloud is enabled, sync stays within the user's own iCloud account.

MSCLS is available on the App Store (id 6772619596) for €1.49/month (30-day free trial) or €24.99 for lifetime access.

## Key features

- **Thermal Muscle Heatmap**: A dynamic 7-day heatmap across male and female body figures shows which muscles were trained and how hard. Helps identify overtraining and neglected muscle groups at a glance.
- **Live Workout Runner**: A focused active view for logging sets, weights, and reps. Personal records are detected and surfaced in real time.
- **Multi-Gym Tracking**: Logs and personal records are kept separate per gym location, so different equipment and plate weights never blur together.
- **Smart Exercise Library**: A searchable, filterable picker for every exercise. Effective weight for bodyweight variants is calculated automatically.
- **Optional Heart Rate**: Heart rate is strictly opt-in. The iPhone runs the session on its own; a paired Apple Watch or Garmin watch can stream heart rate when desired.
- **Apple Health Sync**: Finished sessions, durations, and heart-rate data can be synced to Apple Health.
- **Strava Export**: Opt-in upload of finished workouts to Strava as rich strength activities, including a muscle heatmap, heart-rate chart, and per-exercise breakdown.
- **Garmin Connect Recording**: Opt-in — with a paired Garmin watch, a finished strength workout is recorded as a native activity in Garmin Connect (with heart rate), counting toward Garmin training metrics just like a watch-recorded workout. Writing strength sessions into Garmin Connect is an integration most gym trackers do not offer.
- **Privacy by Design**: No account or login required. No personal data collected. Workout data never leaves the device unless the user explicitly chooses to share it. Anonymous usage events (opt-out) help improve the app.

## Ideal for

- People who want a gym tracker that doesn't collect or monetize their health data
- Lifters who train at multiple gyms and need separate logs per location
- Anyone who wants to visualize weekly muscle load and recovery
- iPhone users who value native iOS design and do not want a subscription to a cloud service
- Users who want optional Strava or Apple Health integration without being forced into it
- Garmin users who want their gym sessions recorded to Garmin Connect, not just their runs and rides

## Platform

- **Requires**: iPhone with iOS 17 or later
- **Optional**: Apple Watch for heart-rate streaming, or a Garmin watch for heart-rate streaming and optional recording of workouts to Garmin Connect (no logging on watch required)
- **Languages**: English
- **Privacy**: No account, no personal data collected; anonymous usage events only (opt-out in Settings)

## Pricing

- Monthly: €1.49/month with a 30-day free trial
- Lifetime: €24.99 one-time purchase
- Current pricing is always shown on the App Store listing

## Links

- [Website](https://mscls.app/): Homepage with feature overview and FAQ
- [Privacy Policy](https://mscls.app/privacy.html): Full privacy policy
- [App Store](https://apps.apple.com/app/id6772619596): Download on the App Store
- [Instagram](https://www.instagram.com/mscls.app): @mscls.app
- [Contact](mailto:mscls.app@icloud.com): mscls.app@icloud.com