Best Strength Training Apps for iPhone

Fitbod is the best overall strength training app for iPhone because its AI generates a fresh workout each session based on your recent volume, recovery, available equipment, and training goal. The 4.81 rating across 270,296 reviews makes it the most-vetted intelligent programming app in this category.

What sets Fitbod apart is the adaptive logic. Tell it you have 45 minutes, a barbell, dumbbells, and a cable stack, and it builds a session that hits the right muscles given what you trained yesterday. The 600-plus exercise library has clean form videos, the rest timer is dialed, and the Apple Watch app handles set logging without unlocking your phone.

Use case: a busy intermediate lifter who can train four to five days a week but doesn't want to write programs. Fitbod handles the periodization decisions, surfaces accessory work that addresses imbalances, and adjusts intensity when you log RPE. It works equally well in a commercial gym or a home setup with limited equipment.

The tradeoff is the AI black box. If you're a programming nerd who wants explicit control over every set, Fitbod's decisions can feel opaque, and the lack of an explicit 5/3/1 or PPL template means you can't follow a famous program as written. Pricing at $12.99 monthly or $79.99 annually is fair. For lifters who want intelligent programming without spreadsheets, Fitbod is the strongest pick.

LADDER Strength Training Plans is the best strength training app for hypertrophy because it pairs you with elite-level coaches — many of whom train pro athletes — running structured multi-week strength, hypertrophy, and conditioning programs. The 4.95 rating across 136,453 reviews is the highest in this category.

What sets LADDER apart is the small-team format. You don't get a one-on-one coach; you join a team of lifters following the same program with a coach who answers questions, demonstrates form, and adapts the plan group-wide. The energy of a small cohort training together translates surprisingly well to digital format, and the coach roster includes names from CrossFit, powerlifting, and athletic performance.

Use case: an intermediate lifter who has run beginner programs solo, plateaued, and wants real expert eyes on their training without paying for one-on-one coaching. LADDER's $29.99 monthly fee is far cheaper than personal training and the program quality reflects pro-grade methodology.

The tradeoff is the team model — you don't get bespoke programming, and if your schedule diverges from the team's, you fall behind on the daily cadence. Equipment requirements also lean toward well-equipped gyms. For lifters serious enough to commit to a real program with coach oversight, LADDER is unmatched at the price.

Strong is the best strength training app with Apple Watch because the Watch app is widely considered the most polished in the category, paired with a logger interface laser-focused on the lifting workflow: pick a workout, tap to log sets, hit the rest timer, repeat. The 4.86 rating across 108,375 reviews comes from over 1.2 million users who chose Strong for clean simplicity, including features in CNBC and The Verge.

What sets Strong apart is restraint. Where Fitbod generates and Boostcamp programs, Strong gets out of your way. The exercise library is curated rather than exhaustive, the plate calculator is one tap, and the Apple Watch app is widely considered the most polished in this category — start your workout from your wrist, log sets without unlocking your phone, and let the rest timer drive your pace.

Use case: an experienced lifter who already knows their program and just needs a great logger. Strong respects your time and your training; it doesn't try to coach you. Free tier covers core logging; Strong Pro at $4.99 monthly unlocks supersets, cardio tracking, and detailed analytics.

The tradeoff is the deliberate lack of programming intelligence. Strong won't tell you what to do; it'll track what you did. If you want AI generation or built-in programs, look at Fitbod or Boostcamp instead. For lifters who want the cleanest possible logging experience, Strong is the standout pick.

Hevy is the best strength training app for women and serious hypertrophy because the social-tracking interface, share-friendly workout cards, and clean volume analytics make consistent training easier to stick with. The 4.92 rating across 67,654 reviews reflects a fast-growing, devoted community.

What sets Hevy apart is the polish. Workout cards are designed to share to Instagram or send to a training partner, the exercise library is huge with form videos and notes, supersets and drop sets work with one tap, and the analytics surface PRs and volume trends without making you do the math. Free tier is genuinely usable; Hevy Pro at $5.99 monthly adds routine folders, custom exercises, and advanced analytics.

Use case: a lifter who values community and accountability, who wants their workout app to feel modern rather than clinical, and who appreciates that Hevy doesn't gate basic features behind a paywall. The growing user base also means programs and templates flow through the Routines feed.

The tradeoff is that Hevy is younger than Strong and JEFIT, so the depth of historical data, plate calculator polish, and Watch app maturity are still catching up. Programming intelligence is also minimal — Hevy is a logger, not a programmer. For lifters who want a beautiful, social-friendly experience, Hevy is the strongest pick.

JEFIT is the best strength training app for tracking detail because it has been refining the workout-tracking workflow since 2010, with one of the largest exercise libraries on the App Store, HD video instructions, and template plans for cutting, bulking, and maintaining. The 4.77 rating across 46,584 reviews reflects steady satisfaction from a long-time user base.

What sets JEFIT apart is the depth of options. The exercise library covers thousands of movements with muscle group targeting, the workout planner supports complex set structures including drop sets, rest-pause, and pyramids, and the community feed lets you follow lifters and download their programs. The free tier is broad; JEFIT Elite at $12.99 monthly unlocks advanced analytics and unlimited routines.

Use case: a detail-oriented lifter who wants granular control over every set, set-type, and tempo, and who values an exercise library with options for any equipment scenario. JEFIT works particularly well for users who train multiple modalities (lifting, cardio, mobility) and want one app to track everything.

The tradeoff is the interface, which can feel dated compared to Hevy or Caliber. Some reviewers describe JEFIT as feature-rich but visually cluttered, and the Watch app lags behind Strong's polish. For users who prioritize depth over design, JEFIT is the most comprehensive pick.

Boostcamp is the best strength training app for powerlifting because it ships with the canonical strength programs — 5/3/1, nSuns, GZCLP, Sheiko — alongside 130-plus expert-built programs including PPL, PHUL, PHAT, and more — pick one, follow it set by set. The 4.85 rating across 8,762 reviews comes from over a million lifters who logged 300 million-plus workouts.

What sets Boostcamp apart is curated quality. Most app program libraries pull from random fitness influencers; Boostcamp's library is sourced from credible names — Jeff Nippard, Greg Nuckols, Alex Bromley, plus the most-recommended Reddit programs. The auto-progression handles RPE and 1RM-based prescriptions, and the built-in deload weeks prevent burnout.

Use case: an intermediate lifter who knows they need a structured program but doesn't want to write one. Boostcamp lets you start a 16-week program in two minutes and follow it without spreadsheet juggling. The community programs section also lets you remix and share custom plans.

The tradeoff is the focus. Boostcamp is built for following programs, not generating ad-hoc workouts the way Fitbod does. Quick standalone sessions feel awkward inside the program-tracking flow. Boostcamp Pro at $9.99 monthly unlocks the full program library. For lifters who want the canonical programs in one slick app, Boostcamp is unmatched.

Caliber is the best strength training app with a coach because the Premium Coaching tier matches you with an elite-level personal trainer who designs your program, reviews progress weekly, and chats with you in-app. The 4.84 rating across 5,576 reviews comes from a smaller but high-engagement audience.

What sets Caliber apart is the integration of resistance training, cardio, nutrition, and habit formation in one platform. The free tier is genuinely usable — 600-plus exercises, unlimited workout creation, training with friends — and Caliber Plus at $19.99 monthly adds coach-designed plans and nutrition targets. Premium Coaching ($199+ monthly) brings real one-on-one trainers.

Use case: a lifter who has hit the limits of self-coaching and wants real expertise without paying for in-person training. Caliber's coaches handle progressive overload, deload timing, exercise selection for your goals, and form review via video.

The tradeoff is the coaching cost. At $199 to $250 monthly, Premium Coaching is the most expensive option in this list, though still cheaper than weekly in-person sessions. The free tier alone is good but not best-in-class against Strong or Hevy. For lifters who want a real coach in their pocket, Caliber is the strongest pick.

GymBook is the best minimalist strength training app for iPhone users who want a clean, native-feeling logger without the social or AI layer. The 4.79 rating across 2,353 reviews comes from a small but loyal audience of European and US lifters who prize design quality.

What sets GymBook apart is the interface. Built by an Austrian studio, the app feels like a modern iOS-native product — animated exercise images, clean muscle-group visualizations, and a beautifully laid-out set logger. The free tier covers core logging; subscription unlocks deeper analytics and unlimited custom exercises.

Use case: a lifter who already knows their program and wants the best-looking logger on iOS, who appreciates iCloud sync and Apple Health integration, and who doesn't want community feeds or AI suggestions cluttering the experience.

The tradeoff is feature breadth. GymBook's exercise library at 50-plus is smaller than Strong's curated set and far smaller than JEFIT's thousands. The Watch app and programming features also lag behind larger competitors. For users who prioritize visual polish and iOS-native feel, GymBook is the strongest small-developer pick.

Gym Workout Planner & Gym Log from Leap Health is the best strength training app for beginners on a budget because it calculates 1RM, generates routines based on goal (gain muscle, endurance, max strength, get toned), and offers extensive guidance for users new to lifting. The 4.86 rating across 1,310 reviews comes from a smaller audience but reflects strong satisfaction in its target user.

What sets Gym Workout Planner apart is the goal-driven onboarding. Tell it your current level, available equipment, and what you want, and it builds a starting program with explicit progression rules. The educational content addresses common new-lifter questions — what's a 1RM, how to warm up, when to deload — that mainstream apps assume you already know.

Use case: a complete beginner who feels intimidated by the gym and wants a step-by-step app that says do this, then this, then this. Leap Health's broader app ecosystem (intermittent fasting tracker, fitness tools) also gives it credibility as a holistic-health developer.

The tradeoff is the smaller user base and shallower exercise library compared to Fitbod or JEFIT. Subscription pricing aligns with the category. For new lifters who want hand-holding through the first six months, Gym Workout Planner is a credible entry-level pick.