Built by lifters, for lifters.
Most workout apps are glorified spreadsheets. You log sets and reps, and that's it. They never tell you what to do next. StrengthMaxxer exists because we wanted something better: an app that actually understands progressive overload, scores your strength objectively, and programs your next session automatically.
Not another logging app.
Every training session generates data. Most apps store it and give you a chart. StrengthMaxxer does something with it: it runs your results through one of 6 science-based progression algorithms and calculates exactly what you should lift next time. Linear progression for beginners, RPE autoregulation for advanced lifters, and four modes in between.
Your lifts are scored against population standards for 200+ exercises, adjusted for your gender and body weight using Brzycki 1RM estimation. You get an exact percentile, not a vague badge. Beginner, Novice, Intermediate, Advanced, or Elite - and the number to prove it.
The fatigue system tracks recovery per muscle group. 11% fatigue per primary set, linear decay over 48 hours. If your chest is still at 40% fatigue from Monday, the app tells you before you start another push session on Tuesday.
Technical details that matter.
Cross-workout sync
Improve on bench press in one workout, and the new target weight propagates to every other workout containing bench press.
Equipment-aware increments
Barbell exercises progress in 2.5kg/5lb steps. Dumbbells use 2kg/5lb. Kettlebells jump 4kg. The app knows the difference.
Stall detection
Three consecutive sessions failing at the same weight triggers an automatic 10% deload. No manual intervention needed.
Apple Watch controls
Rotate the Digital Crown to adjust weight and reps. No tiny buttons on a small screen. Rest timer haptics on your wrist.
Privacy is not a feature. It's the architecture.
StrengthMaxxer has no server. Your workout data is stored on your device using SwiftData. No accounts, no sign-ups, no tracking pixels. Payments are verified on-device through StoreKit 2 - we never see your payment information.
If you enable iCloud sync, your data goes to your iCloud account - encrypted by Apple, accessible only to you. We have no ability to read it. The only external service is Sentry for crash reports, which contain zero workout data.