# 4Level — Stick to your resolutions

> For ambitious amateur athletes: one honest fitness level from your Apple Health workouts — and a clear view of whether you stick to your own training resolutions. Developed by Robert Poetzsch under the RobSpace brand.

## About

4Level is an iPhone and iPad app. It analyses the workouts you already record; it does not create training plans, workouts or coaching advice and does not replace a coach. It reads from Apple Health — everything your Apple Watch, Garmin Connect, Strava, Zwift, Wahoo and other apps write there.

- Website: https://4level.app.robspace.de/ (English, German, French, Spanish, Italian: ?lang=en|de|fr|es|it)
- Privacy policy: https://4level.app.robspace.de/#privacy-policy (in all five languages, e.g. https://4level.app.robspace.de/?lang=fr#privacy-policy)
- Support: support@robspace.de
- Developer: Robert Poetzsch, Hofheim am Taunus, Germany
- Version: 1.2 (English, German, French, Spanish and Italian) — in the App Store since 2026-10-01; version 1.1 released 2026-10-04; version 1.2 released 2026-10-05
- App Store: https://apps.apple.com/app/4level/id6816633802

## Key Features

- Level 1 to 100 from fitness (training load of six weeks, CTL), capacity (running VO2max/VDOT or cycling watts per kilo) and consistency — how regularly you train and, once set, how faithfully you keep your resolutions
- Calculated for every day back to your first workout, using only what was known on that day
- Training resolutions per sport (running, cycling, hiking, swimming, strength): days and frequency, optional kilometre targets, heatmap over 26 weeks, streak in weeks, month balance
- Fitness, fatigue and freshness (CTL, ATL, TSB); race predictions from 5 km to marathon from the runs of the last 120 days
- Running, cycling and hiking: yearly goals, year-over-year comparison, weekly volume, records, searchable list of all workouts
- Per sport you choose which app's recording counts; duplicate recordings count once
- Five languages since version 1.1: English, German, French, Spanish and Italian; follows the device language
- Demo without any data

## Pricing

30 days free with everything included. Afterwards 4Level Pro: a yearly subscription or a one-time lifetime licence, handled by Apple.

## Privacy

No account, no server, no analytics, no ads. Data is read from Apple Health and stays on your device. Reads Apple Health read-only (workouts, heart rate, resting heart rate, cycling power, body weight, VO2max, date of birth, sex). No tracking, no third-party SDKs. Deleting the app removes all workouts and history; only a small purchase record (trial start, purchase status, reminders shown) stays in the device keychain, without health data and never synced. The level is a training aid, not a medical assessment.