Iridium vs Strong
Strong has the best pure logging experience on iOS. Iridium adds AI coaching, recovery programming, and nutrition. Two very different approaches.
TL;DR
Choose Strong if you follow your own program and want the cleanest, fastest way to log sets on iOS. Nothing beats its design.
Choose Iridium if you want fully personalized workouts that adapt to every set in real time, built-in nutrition tracking, and an AI coach you steer with custom instructions — not just a logbook.
What Strong does well
- Best iOS-native design. Strong feels like Apple made a workout app. Clean, fast, consistent with iOS conventions.
- Excellent Apple Watch app. Log sets from your wrist, control rest timers, track your whole session without touching your phone.
- PR & records tracking. Per-rep records, estimated 1RM, and detailed history for every exercise.
- Fast. Logging a set takes under 2 seconds. Minimal friction between you and your workout.
What Iridium does that Strong doesn't
- Real-time set adaptation. Iridium adjusts your remaining sets mid-workout based on how each set actually goes. Strong records what you did — it doesn't change the plan as you go.
- Fully personalized workouts. Iridium builds each session around your goals, equipment, history, and recovery, and tells you what to train. Strong logs whatever you decide to do.
- Steerable AI coach. Write custom instructions Iridium follows every session, plus a chat coach you can ask to swap exercises or adjust sets mid-workout. Strong has no coaching layer.
- Nutrition tracking. Barcode scanning, AI food logging, macro tracking. You need a separate app with Strong.
- Volume landmarks & recovery. Iridium tracks optimal training volume (MEV/MAV/MRV) and per-muscle recovery. Strong measures neither.
What Strong does that Iridium doesn't
- Slightly faster logging. Strong's minimal design means fewer taps per set. By a small margin.
- CSV export. Export your full workout history for analysis. Iridium doesn't offer this yet.
- Android support. Strong runs on iOS and Android. Iridium is iOS only.
Feature Comparison
| Feature | Iridium | Strong |
|---|---|---|
| Real-Time Set Adaptation | ✅ | ❌ |
| Personalized AI Workouts | ✅ Recovery-aware | ❌ Manual only |
| Custom AI Instructions | ✅ | ❌ |
| Nutrition Tracking | ✅ Built-in | ❌ |
| Volume Landmarks | ✅ MEV/MAV/MRV | ❌ |
| Per-Muscle Recovery | ✅ | ❌ |
| RPE Logging | ✅ | ✅ |
| Apple Watch | ✅ Companion | ✅ Excellent |
| Logging Speed | Fast | Very fast |
| PR Tracking | ✅ 5 types | ✅ Records & 1RM |
| Cross-Platform | iOS only | iOS + Android |
| Social Features | ❌ | ❌ |
| CSV Export | ❌ | ✅ |
Want more than a logbook?
Iridium programs your workouts around recovery, tracks volume science, and handles nutrition. Try it free.
Download Iridium for iOS