16 progressive programmes with planned deloads. Track every lift with 1RM, PRs and plateau alerts. Run HIIT with live heart rate. Get a weekly AI coach. Import your training history from another app.
Strength training built for lifters in their 30s, 40s and beyond. Most apps are written for 25-year-olds. STRNTH is for people who have lifted before, or are starting now, and want to train for the long game.
Open the app, your session is ready, and log a set in two taps.
Free forever
No card required, no time limit. These features stay free.
- Workout logging across sets, reps and weight, including bodyweight, assisted and added load
- Built-in programs with multi-week blocks and deloads baked in
- Two-tap exercise swaps mid-workout
- Rest and tempo timers with voice cues
- HIIT preset library with Bluetooth heart rate and smart-trainer support
- Body composition with caliper body fat, waist to height and fuel guidance
- The STRNTH Index, PRs by muscle group and a year-long trend line
- Customisable home dashboard with drag-and-drop widgets
- Fatigue-aware readiness chip based on training stress and age
- Ask STRNTH library of curated answers on training, recovery and nutrition
- Workout history with charts, PR badges and exercise breakdowns
- Progress photos with a before and after compare, locked behind Face ID
- Import your workout history from other workout apps
- Cardio logging for runs, rides, walks and swims, with pace and distance
- Quick workouts and targeted sessions by muscle group or time
- Adaptive resistance that holds your heart-rate zone on a smart trainer
- Training block reviews with a shareable summary after each block
- PT summary to hand your numbers to a personal trainer
STRNTH Plus (Requires paid plan)
Add custom content and unlock the full catalogue.
- Custom programs: design a 4, 8 or 12 week block with your own splits and lifts
- Custom workouts built from scratch
- Custom HIIT with your own blocks and timing
- Add your own exercises with muscle group tagging
- Full program catalogue and full training history
- Log workouts retroactively on past dates
STRNTH Pro (Requires paid plan)
Everything in Plus, with cloud backup and the age-aware AI coach.
- Cloud backup. Sync across devices, reinstall without losing data
- Age-aware AI coaching weekly review of readiness, training density and recent volume
- Ask STRNTH AI: free-form questions answered with your last six months of training
- Save adapted workouts when you change exercises mid-session
- Plateau coaching when a lift stalls
- Build this week from your recent training
- Community programs: publish and enroll with other Pro members
- Connect your AI assistant (beta, Pro) and build strength workouts, programmes and HIIT sessions
- Build workouts and HIIT with AI by describing them in plain words
Paid plan details
STRNTH Plus and STRNTH Pro are auto-renewing paid plans, billed monthly or yearly.
Payment will be charged to your Apple ID account at the confirmation of purchase. Your paid plan automatically renews unless canceled at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours prior to the end of the current period. You can manage and cancel your paid plan in your account settings on the App Store.
STRNTH is built by Billy, a developer-lifter who got tired of fitness apps that treated him like a 22-year-old. Quiet by design. Honest about pricing. Built for the long game.
Terms of use: https://strnthapp.com/terms
Privacy policy: https://strnthapp.com/privacy
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