Corpus vs Strong
Short answer: Strong is a fast, minimal workout log that has been around for years. Corpus logs your lifts in similar detail, remembers your machine settings and effort per set, and adds nutrition, sleep and recovery with statistics on your own data. Pick Strong for a no-frills log; pick Corpus if you want to understand what drives your progress.
| Feature | Corpus | Strong |
|---|---|---|
| Workout logging | Sets, reps, weight and RPE, with RIR per set in Advanced mode, machine settings remembered per exercise and multi-pin machines logged pin by pin | Sets, reps, weight and RPE, supersets, warm-up calculator, timers |
| Training load | Session load (effort × minutes, the Foster method), estimated 1RM, volume and strength trends per exercise | Charts of volume, estimated 1RM and personal records |
| Body measurements | Weight, body fat and FFMI, synced from a Withings scale or logged by hand | Bodyweight and body part measurements |
| Food and macros | Barcode scanning, macros per meal and per day, supplements, caffeine and water | Not part of the app |
| Sleep and recovery | Sleep stages, overnight HRV, resting heart rate and a daily readiness score, synced from your wearable or logged by hand | Not part of the app |
| Insights | Tests how your own sleep, food and habits relate to your training and recovery, with corrections for multiple comparisons | Advanced charts of your workouts and personal records |
| Connections | Wearables, Withings smart scales, Strava | Apple Health and other third-party integrations |
Based on each app's public feature pages, last checked September 2026. Spotted something out of date? Let us know and we'll fix it.
Choose Strong if…
- You want the simplest, fastest possible workout log.
- You like built-in helpers such as a warm-up calculator and custom timers.
- Lifting is the only thing you want to track.
Choose Corpus if…
- You train at more than one gym and want machine settings remembered per exercise.
- You want food, sleep and recovery next to your lifts, not in separate apps.
- You want your own data to show which habits help your training and which don't.
Want to try it on your own data?
Get early access