⚡ Strong App Alternative

Strong is a great logger.
SuperFlex does more.

Strong caps your free plan at 3 routines and has no progress photos or recovery tracking. SuperFlex gives you unlimited logging, guided photo comparisons, and muscle recovery insights — all in one app.

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SuperFlex iPhone and Apple Watch app shown on gym equipment

Where SuperFlex Wins

Three things Strong doesn't do

Both apps log your sets. But for athletes who want the full picture, the gaps matter.

Progress photos — built in

SuperFlex includes a guided camera overlay for front, side, and back shots. Compare any two dates side by side to see exactly how your physique has changed. Strong has no photo feature at all.

SuperFlex progress photo comparison screen showing before and after side by side

Actually unlimited free tier

Strong's free plan maxes out at 3 workout routines — then it's $4.99/month. SuperFlex is unlimited forever: unlimited routines, unlimited history, unlimited custom exercises. No artificial caps.

Muscle recovery tracker

After every session, SuperFlex analyzes your volume by muscle group and shows you which muscles need more time. Strong is a logger — it records the past but doesn't help you plan the next session.

SuperFlex app screens showing recovery status and calendar views

Feature Comparison

SuperFlex vs Strong — side by side

An honest look at how the two apps stack up on the features that matter to serious lifters.

Feature SuperFlex Strong
Free tier Unlimited — no caps Max 3 routines, then paid
Pro price $4.99 / month $4.99 / mo · $99.99 lifetime
Progress photos ✓ Front, side & back (Pro) ✗ Not available
Muscle recovery tracker ✓ Per-muscle status + suggestions ✗ Not available
1RM / PR tracking ✓ Per-exercise history charts ✓ Real-time PR detection
RPE logging ✓ ✓
Set types (warmup, drop, failure) ✓ ✓
Superset support ✓ ✓
Unilateral tracking (per-limb) ✓ Per-limb reps + weight ✗ Not available
Apple Watch app ✓ watchOS 10+ ✓ watchOS 10+
HealthKit integration ✓ ✓
Home screen widgets ✓ ✗
CSV data export ✓ ✓
Social feed Private — no feed Private — no feed
AI coach / program suggestions Coming in Phase 2 ✗ "Bring your own program"
Lifetime purchase ✗ ✓ $99.99
iOS minimum iOS 17.0+ iOS 15+

Being Honest

Where Strong has the edge

No app wins everywhere. Here's where Strong genuinely does better, so you can make an informed call.

Lifetime purchase option

Strong offers a one-time $99.99 lifetime purchase. If you're certain you'll use a workout app for 2+ years and want to pay once, Strong's pricing model has a clear advantage. SuperFlex is subscription-only for now.

Lower iOS requirement

Strong runs on older iPhones (iOS 15+). SuperFlex requires iOS 17.0 or later. If you're on an older device and can't update, Strong is the right call.

Established track record

Strong has been around for over a decade with tens of thousands of reviews. SuperFlex is launching soon — we're newer, and if you need a long track record before trusting an app with your training data, that's fair.

FAQ

Common questions

Everything you need to know before making the switch.

Does the Strong app have progress photos?
No. Strong does not include a progress photo feature. SuperFlex includes a built-in progress photo manager with guided front, side, and back camera overlays, plus side-by-side comparison across any two dates. Progress photos are part of the SuperFlex Pro subscription ($4.99/month).
How is SuperFlex different from the Strong app?
The main differences: SuperFlex has an unlimited free tier (Strong caps you at 3 routines). SuperFlex includes progress photos with a guided overlay — Strong has no photo feature. SuperFlex includes a muscle recovery tracker — Strong has no recovery tracking. Both apps offer Apple Watch support, RPE logging, superset support, HealthKit integration, and CSV export at the same $4.99/month price.
Is SuperFlex really free with no limits?
Yes. SuperFlex offers unlimited workout logging and basic analytics completely free — no cap on routines, workout history, or custom exercises. SuperFlex Pro ($4.99/month) adds progress photos, 1RM forecasting, and premium routine templates. You'll never hit a wall on the free plan.
Does SuperFlex have an Apple Watch app?
Yes. SuperFlex includes a full Apple Watch companion app for watchOS 10.0 or later. You can log sets, track rest timers, and complete full workouts directly from your wrist without pulling out your phone between sets.
Does Strong have a muscle recovery tracker?
No. Strong doesn't include recovery tracking. SuperFlex analyzes your recent training volume per muscle group and shows a recovery status for each one — so you always know which muscles need rest and what to prioritize in your next session.
When is SuperFlex available on the App Store?
SuperFlex is in final testing and launching soon on the App Store for iPhone (iOS 17.0+). Join the waitlist at superflex.fit to be notified the moment it drops — waitlist members get first access and details on the early-access Pro trial.

Ready for a workout app that does more?

SuperFlex is launching soon on iPhone. Join the waitlist and be first through the door — with early-access Pro trial details.

Join the Waitlist — Free