Best fitness and gym tracker apps for iPhone compared
The best fitness app is the one that fits how you train. For strength work, Strong and Hevy offer the best no-frills tracking; runners can use Nike Run Club for free or Strava for its community; and WorkOutDoors is the most…
The best fitness app is the one that fits how you train. For strength work, Strong and Hevy offer the best no-frills tracking; runners can use Nike Run Club for free or Strava for its community; and WorkOutDoors is the most powerful option for Apple Watch users doing outdoor activities.
March 2026: Hevy has grown strongly as a strength tracker alongside Strong, while WorkOutDoors remains the best Apple Watch option.
From Fitbod and Hevy to Strong and Reps & Sets, this comparison covers the best apps for strength training and gym logging on iPhone and Apple Watch. It adds short-workout favorites such as Seven and gentler trackers like Gentler Streak and FitWoody, which approach fitness without pressure. Running, outdoor sports, water tracking and wearable sync have their own lists, and the comparison is for anyone who wants to train more deliberately, from lifting in the gym to outdoor activity on the Apple Watch.
Our verdict
Fitness apps work best when they fit your own training style. Runners need something different from people who lift, and anyone training outdoors needs something different from gym members. Strava matters for anyone looking for community motivation, while Strong or Fitbod suit people who want to track structured strength training with progression.
Liftin' is a minimalist strength tracker that does the essentials well: log exercises, increase weights automatically according to rules, and see progress in clear charts. It is aimed at gym lifters who value speed and clean data over extra features.
The base tracking is free; Liftin' Plus unlocks all programs, automatic progression and unlimited exercises for around €4,99 per month or €29,99 per year, and the app is ad-free. The Apple Watch app is a particular strength, while it is less suited to tracking cardio, yoga or bodyweight routines.
Strong is a clean, fast strength tracker for the gym, built to log weights, sets and reps without getting in the way. The free version is enough for many people, and the Pro version is aimed at serious lifters who want deeper analysis.
Pro costs around €5 per month and adds advanced training analysis and AI recommendations. Without a subscription you are limited to three routines, and Strong is less suitable if you want to track cardio and other sports alongside lifting.
Hevy is a strength tracker aimed at gym lifters who want automatic personal-record tracking without advertising. It logs weights and reps, highlights new records automatically, and adds a social feed for training ideas and comparison with other athletes.
The base app is free and the Pro subscription costs around €5 per month for advanced analysis and AI recommendations. It is less of a fit if you train only at home without equipment or expect every analysis feature for free.
Reps & Sets is a detailed strength logger that comes with an Apple Watch app and supports advanced techniques such as supersets and drop sets. It also syncs through iCloud and is aimed at lifters who want precise records without a subscription.
The app is completely free, ad-free and has no in-app purchases. It does not offer ready-made training plans, and it is not the right choice if you want to compare yourself against a social community.
GymStreak is an AI personal trainer that builds adaptive plans and tracks calories from photos. It is aimed at regular gym-goers who want a structured plan without designing it themselves and who value quick food logging.
Basic tracking is free, while the AI coach with personalized plans and photo calorie tracking costs around €9,99 per month or €49,99 per year, and the app is ad-free. It is less suitable if you train only at home with bodyweight or refuse to pay a subscription.
Streaks Workout is a bodyweight workout app with 30 exercises and no equipment required, acting as a workout generator rather than a multi-week plan. It suits people who want short sessions at home or on the move, with exercises shown on the Apple Watch.
It is a one-time purchase for €5,99 with no subscription, no in-app purchases and no advertising. The Tasmanian indie studio Crunchy Bagel earns only from app sales and also makes the Streaks habit tracker, and it is not built for progressive barbell training or guided plans over several weeks.
Freeletics combines bodyweight HIIT with an AI coach and comes from a Munich-based company with a long track record in German-speaking markets. It is aimed at people who want high-intensity training without a gym and who prefer guidance in German.
The free version contains 34 HIIT workouts and community features; the coach with personalized plans costs around €13 per month or €80 per year, about €6,67 per month. It is not the best fit for classic barbell periodization, and the free version is limited if you want to train without a subscription.
Gentler Streak is a gentle fitness tracker that treats recovery as part of the plan and avoids guilt over missed days. It suits people who want to stay active without being punished by streaks, with Apple Watch integration at the center.
The subscription costs around €3 per month or about €25 per year. The approach is strong, though the source notes that the subscription cost is debatable for what is included, and ambitious athletes chasing maximum performance will outgrow it.
Fitbod uses AI to build a daily training plan based on recovery, for both the gym and home workouts. It is aimed at people who do not want to create their own program and prefer the app to choose exercises, sets and weights.
The subscription starts at around €14 per month or about €80 per year, with no permanent free tier and only a short trial. It is less suitable if you follow a fixed program and do not want AI changes, or if you do not want to spend €10–15 per month on a fitness app.
Seven builds seven-minute workouts with no equipment and adds challenges and streaks to keep motivation up. It is aimed at people who can carve out only a few minutes a day and want to train at home without gear.
The base app is free; the Club subscription costs around €10 per month for all workouts, personalized plans and an ad-free experience. More experienced athletes will find it too limited, and it does not replace a complete personalized program.
TrainerRoad offers structured indoor cycling training with adaptive AI and wattage targets for smart trainers. It is aimed at riders training for events, with clear performance goals and measurable power progress, rather than casual cyclists.
It costs €21,99 per month or €209,99 per year, about €17,50 per month, with no free version and only a 30-day risk-free trial. There is no German-language app, and riders who cycle for fun without racing ambitions are better served elsewhere.
FitWoody is an adaptive tracker that does not punish missed days and integrates deeply with Apple Health. It is aimed at people who want a calmer approach to activity logging and automatic data exchange with Apple's health ecosystem.
The subscription costs around €10 per month and is required to use the app, which also requires iOS 18 or newer. The source notes that there are very few ratings so far, making it hard to assess, and that the price is relatively high.
Peloton is a fitness platform with trainer-led workouts across cycling, yoga, strength and meditation, and it works without a Peloton bike. It is aimed at people who want studio-style classes at home or on the move in one versatile app.
An app membership costs around €12,99 per month, while owners of a Peloton Bike, Tread or Row use the app through the All-Access membership at about €44 per month with no extra charge. It is not built for specialized strength periodization, and Apple Fitness+ via Apple One can be cheaper.
Gymondo is a Berlin-based fitness studio for the home, covering HIIT, yoga, pilates and meditation alongside nutrition plans. It is aimed at people who prefer German-language instruction and a broad range of classes in one subscription.
Access starts at around €10 per month, with an annual plan at about €120 per year for all workouts, programs and meal plans, and a free seven-day trial. Do not count on a health-insurer subsidy: the source says Gymondo no longer offers one.
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