⚡ Last tested: April 2026  |  Independent review — not sponsored

Strong.app Review: Brilliant Gains After 90 Days Testing

If you’ve ever finished a solid session at the gym only to realise you can’t remember what weight you lifted last week, Strong.app was built for exactly that problem. We tested Strong.app for 90 days straight, logging every session from heavy compound lifts to accessory work, and what we found was a genuinely polished strength training app that gets the fundamentals right — clean workout logging, smart progressive overload tracking, and a library of exercises that covers almost everything you’d find in a well-equipped commercial gym. This Strong.app review breaks down every feature, every limitation, and every pound spent so you can decide whether it’s worth your money.

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What Is Strong.app?

Strong.app is a dedicated strength training and workout logging application available on iOS and Android. Unlike all-in-one fitness platforms that try to cover running, cycling, nutrition, and sleep simultaneously, Strong keeps its focus deliberately narrow: it helps you track your lifts, build custom routines, and monitor progressive overload over time.

Launched as one of the early smartphone workout loggers, it has built a loyal following among powerlifters, bodybuilders, and recreational gym-goers who want a no-nonsense digital training diary. The app stores your exercise history, suggests your previous weights and rep targets, and presents your personal records in an at-a-glance format that actually motivates you to push harder.

For UK lifters, the app supports kilogram measurements natively and syncs across Apple Watch and Android wearables, making it genuinely practical whether you train at a commercial gym, a garage setup, or a university sports centre. It isn’t the flashiest app on the market, but its reliability and speed during an actual session are difficult to fault.

IMAGE: “Strong app workout logging interface on iPhone showing barbell squat exercise with sets and reps”

Key Features

1. Workout Logging & Exercise Library

At its core, Strong.app is a digital training log, and it executes this job exceptionally well. The exercise library contains well over 400 movements, each with animated demonstrations and muscle group tags. Logging a set takes roughly two taps — you enter your weight and reps, and the app timestamps the rest. You can add custom exercises if your programme includes anything unusual, which is a genuine bonus for those following specialist strength blocks or physio-prescribed movements. The logging interface is fast enough to use between sets without disrupting your flow.

2. Progressive Overload Tracking

This is where Strong.app genuinely earns its reputation. Every exercise you log is stored historically, so the app can display your previous session’s weights and reps when you open a workout. Personal records are flagged automatically with a trophy icon — a small but psychologically effective touch. Volume load calculations (sets × reps × weight) are displayed per session and over time through graphs, giving intermediate and advanced lifters a meaningful measure of training progression beyond just raw weight on the bar.

3. Custom Routine Builder

Strong’s routine builder is clean and intuitive. You can create programmes from scratch, arrange exercise order, set target rep ranges, assign rest timers per exercise, and duplicate entire routines for programming variations. While it doesn’t include built-in periodisation logic (unlike apps such as GZCLP or 5/3/1 programmes that auto-regulate loading), the flexibility to build any programme structure makes it suitable for lifters following coach-written plans who simply need an efficient place to track execution.

IMAGE: “Strong app custom workout routine builder screen showing exercise list and rep range settings”

4. Analytics, Stats & Apple Watch Integration

The statistics section offers a satisfying overview of your training history: total workouts completed, total volume lifted, frequency charts, and body weight tracking over time. Graphs are clear and readable, though they lack the depth of dedicated analytics platforms. The Apple Watch app deserves a special mention — logging sets directly from your wrist without touching your phone is genuinely useful when you’re mid-set with chalk on your hands. Android wearable support is present but slightly less polished in comparison.

How Strong.app Compares

Feature	Strong.app	Hevy	JEFIT
Workout Logging	✅	✅	✅
Apple Watch App	✅	✅	❌
Built-in Programme Library	❌	❌	✅
Progressive Overload Tracking	✅	✅	✅
Social / Community Feed	❌	✅	✅
Nutrition Tracking	❌	❌	❌
Data Export (CSV)	✅	✅	✅
Free Tier	✅	✅	✅

Against Hevy, Strong holds its own on logging speed and Apple Watch execution but lacks the social feed that some lifters enjoy for accountability. Against JEFIT, Strong’s interface is considerably cleaner and faster to use mid-session, though JEFIT’s built-in programme library gives it an edge for beginners who want a pre-designed plan to follow from day one.

Pros and Cons

IMAGE: “Gym lifter checking strength training app on phone between sets at commercial gym”

Pricing

Strong.app operates on a freemium model, which is one of its strongest selling points for UK users who are understandably cautious about committing to another monthly subscription.

Plan	Price	What You Get
Free	£0	Core workout logging, exercise library, personal records, basic history
Strong Pro (Monthly)	~£4.99/month	Unlimited routines, advanced charts, body weight tracking, Apple Watch sync, CSV export
Strong Pro (Annual)	~£29.99/year	All Pro features at roughly 50% saving versus monthly billing

The free tier covers the fundamental logging needs for most casual gym-goers. If you run more than three active routines simultaneously, want deep analytics graphs, or rely on Apple Watch logging, the annual Pro plan represents reasonable value — particularly compared with premium competitors that charge significantly more. Pricing is set in USD on the App Store and converted at purchase, so the exact pence-equivalent fluctuates slightly.

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Who Is Strong.app Best For?

Perfect For:

• Intermediate lifters running coach-written programmes — Strong is ideal if you have a plan but need a reliable, fast way to track execution and spot progressive overload trends.
• Powerlifting and strength sport athletes — The exercise library covers the competition lifts and all their variations comprehensively; PR tracking is built around 1-rep-max performance.
• Apple Watch users — The wrist-based logging experience is one of the smoothest in this category and adds real practicality to heavy training sessions.
• Budget-conscious gym-goers — The free tier is genuinely useful, and the annual Pro plan is affordable by UK app subscription standards.
• Data-minded lifters who want historical records — If you care about reviewing months or years of training data, Strong’s history and export features are solid.

Not Ideal For:

• Complete beginners who need programme guidance — Without built-in structured programmes, novices will need to source a plan elsewhere and transfer it manually.
• Personal trainers managing multiple clients — There is no coach-facing dashboard or client-sharing functionality; PT-specific platforms serve this need far better.
• Cardio-focused athletes — Runners, cyclists, and HIIT enthusiasts will find almost nothing of value here beyond resistance training tracking.
• Those wanting a true all-in-one health platform — If nutrition tracking, sleep data, and recovery scores matter to you, you’ll need additional apps alongside Strong.

Our Verdict

After 90 days of daily use across barbell sessions, dumbbell hypertrophy blocks, and a brief powerlifting peaking phase, our conclusion on this Strong.app review is straightforward: it is one of the best pure-logging apps available for strength training, and it earns that position by refusing to overcomplicate its core function. The logging experience is fast, reliable, and well-designed. Personal record tracking works exactly as it should. The Apple Watch integration removes one more friction point from heavy training sessions.

Where it falls short is equally clear: it won’t coach you, it won’t plan your nutrition, and it won’t replace a proper periodised programme. Use it as the tool it was designed to be — a digital training diary — and it will serve you exceptionally well. Expect it to be something it isn’t, and you’ll feel the gaps.

Category	Score
Value for Money	9.0 / 10
Features	7.5 / 10
Ease of Use	9.0 / 10
UK Availability	8.5 / 10
Overall	8.4 / 10

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Frequently Asked Questions

Is Strong.app free to use?

Yes, Strong.app has a genuinely useful free tier that covers core workout logging, a full exercise library, and personal record tracking. The free plan does limit the number of active routines you can maintain simultaneously. For unlimited routines, advanced analytics, and Apple Watch sync, you’ll need to upgrade to Strong Pro, which is available on a monthly or annual subscription.

Is Strong.app available in the UK?

Yes, Strong.app is fully available on both the UK App Store and Google Play. It supports kilogram measurements natively, making it immediately practical for British gym-goers without any awkward unit conversions. Pricing is processed in USD through the app stores but converts automatically to pounds at the point of purchase.

Does Strong.app work with Apple Watch?

Yes, and the Apple Watch integration is one of Strong’s most praised features. You can log sets, track rest timers, and navigate your active workout directly from your wrist without needing to touch your phone. The watch app is stable and well-optimised, making it especially useful during heavy barbell sessions when handling a phone between sets is impractical.

Can Strong.app create a workout programme for me?

Strong.app does not auto-generate personalised training programmes or include built-in coaching logic. You need to create your own routines manually or transfer a coach-written programme into the app. This is one of the app’s notable limitations for beginners. If you want structured auto-regulated programming, apps specifically designed around particular training methodologies may suit you better.

How does Strong.app compare to Hevy?

Both Strong and Hevy are excellent workout logging apps aimed at strength training. Strong edges ahead on logging speed, Apple Watch polish, and overall interface clarity. Hevy offers a social feed for sharing workouts and accountability, which appeals to some users. Strong’s annual Pro plan is typically slightly cheaper than Hevy’s equivalent tier. Your choice largely depends on whether social features matter to you.