StrengthLog vs Caliber
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
StrengthLog
Track your workouts, analyze progress, and discover proven strength training programs. Log unlimited workouts, access a vast exercise library, and set goals. Upgrade for advanced statistics and premium programs.
- Unlimited workout logging
- Extensive exercise library with video instructions
- Proven strength training programs
- Progress analysis and statistics
- Goal setting and streak tracking
- Plate calculator and rest timer
- Apple Health integration
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** The world’s most generous workout tracker – built by lifters, for lifters ** Tired of downloading gym apps and creating an account, just to be locked out in a matter of days if you don’t pay or watch endless commercials? We offer 100% gains and 0% ads – with unlimited workout logging and free support for all users! This app is both a workout log and a source for proven strength training programs and tools that will help you reach your fitness goals. With it, you're able to log every workout, view and analyze your progress, find a workout routine that's right for you, create goals, and chase streaks. It’s truly built for lifters, by lifters (in cooperation with hundreds of thousands of other lifters). Have a feature suggestion? Drop us a line at app@strengthlog.com! Our goal is to make our free version the best strength training app on the market! Using it, you can log infinite workouts, add your own exercises, view basic statistics, and track your PRs (both singles and rep records). You’ll also get access to a big library of workouts and training programs for different training goals. If you level up to a premium subscription, you'll gain access to more advanced statistics, our full library of training programs, and our most hardcore features. You will also contribute to the continued development of the app, and we thank you greatly for that! Is that it? No, but it's easier to download the app and see for yourself the next time you're at the gym! Free Features: • Log an unlimited number of workouts. • A massive exercise library with both written and video instructions. • Lots of popular and proven workouts and training programs. • An exercise library with 500+ strength training, mobility, and cardio exercises, plus zero restrictions on how many exercises you can add yourself. • Complete our monthly challenges for added motivation. • A plate calculator that shows you how to load the barbell. • Plan your workouts in advance. • A workout rest timer. • Stats for training volume and workouts. • PR tracking. • Create training goals and streaks. • Several tools and calculators, like 1RM estimates and suggested warm-ups before PR attempts. • Share your data with Apple Health. As a subscriber, you'll also gain access to: • Our entire catalog of premium programs, including ones for individual lifts, powerlifting, bodybuilding, powerbuilding, push/pull/legs, and lots of sport-specific workout routines. • Advanced statistics for tracking and analyzing your strength, training volume, individual lifts/exercises, and more • Summary statistics for all your training, individual muscle groups, and every exercise. • Our muscles worked anatomy map shows how you’ve trained your muscle groups during any given period. • Create unlimited goals and streaks. • Share workouts and training programs with other users. • Advanced logging features include % of 1RM, Rate of Perceived Exertion, Reps in Reserve, and quick stats for every set. We're constantly updating the StrengthLog App with new programs, tools, and features based on our users' wishes! Subscriptions In-app, you can subscribe to our premium version of the StrengthLog App, in the form of automatically renewable subscriptions. • Choose between 1 month, 3 months, and 12 months. • Your subscription will be charged to your App Store account upon confirmation of purchase and will be renewed automatically if the subscription is not canceled at least 24 hours before the end of the current period. • An active subscription cannot be canceled before the active subscription period has ended. However, you can turn auto-renew on/off in your App Store account settings. --- Apple Health When giving the app permission to sync with Apple Health, we only share the information you request us to share – the app does not receive any data in return – and the data is only shared with your private Apple account.
Caliber
This app offers science-based strength training, including workout planning, tracking, and exercise tutorials. It supports individual training, group workouts, and offers optional upgrades for personalized plans, advanced features, and one-on-one coaching.
- Unlimited workout creation and tracking
- 600+ exercise tutorials with videos
- Workout groups for training with friends
- Coach-designed training plans
- Personalized progress tracking
- 1-on-1 elite coaching options
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Caliber is a science-based strength training app that combines resistance training, cardio, nutrition, and habit formation to help you build muscle, lose weight, and improve your overall fitness - for good. TRAIN YOUR WAY • Free Version. Create and track unlimited workouts, access 800+ exercises, and train solo or with friends. • Caliber Plus. Maximize your results with coach-designed training plans, personalized progress tracking, nutrition targets and more. • Premium Coaching. Get 1-on-1 guidance from an elite-level personal trainer with a fully customized training and nutrition plan, in-app chat + video messaging with your coach and weekly progress reviews to keep you on track. CALIBER FEATURES (FREE VERSION) • Personalized Workouts. Create and track an unlimited number of workouts tailored to your goals. No gym required. • Detailed Exercise Tutorials. Learn proper form with step-by-step videos and pro tips from Caliber coaches. • Workout Circles. Train with friends and family in private workout chats. When you hit a personal best, it's shared with the group. • Apple Health Integration. Sync your cardio, nutrition, steps and body stats from your wearable or connected device. • Connect to AI. Sync your training data with ChatGPT and Claude for personalized insights and training analysis. UNLOCK MORE WITH CALIBER PLUS (OPTIONAL UPGRADE) • Coach-Designed Training Plans. Choose from 120+ structured plans tailored to your goals, experience level and schedule. • Strength Score. Measure how strong you are relative to your potential for your age and gender. • Strength Balance. Improve your posture and mobility by optimizing your training across key muscle groups. • Caliber Lessons. Gain expert insights on training and nutrition to accelerate your progress. • Advanced Training Features. Get personalized nutrition targets, create custom exercises and supersets, swap exercises, upload progress photos, and more. PREMIUM COACHING (OPTIONAL UPGRADE) • Work with an Elite-Level Coach. Train 1-on-1 with a dedicated coach to achieve your full potential in the gym and beyond. Caliber coaches are highly vetted, accredited personal trainers among the top 1% in their field. • Fully Personalized Plan. Your coach will design a training and nutrition program just for you based on your goals, experience and lifestyle. • Daily Motivation & Expert Guidance. Stay on track with in-app messaging, video form reviews, and individualized guidance. • Weekly Progress Reviews. Get in-depth analysis from your coach to optimize your training. • Fast Response Times. Your coach is available 24/7, typically replying within a few hours. • Guaranteed Results. On average, Caliber members improve their body composition by 20% or more within 12 weeks. If you don't see results, we'll refund the cost of the program. SEE WHAT OUR MEMBERS SAY • For detailed reviews from real Caliber members, visit our TrustPilot page at https://www.trustpilot.com/review/caliberstrong.com Terms of Use: https://caliberstrong.com/terms-of-service/ Privacy Policy: https://caliberstrong.com/privacy-policy/
Screenshots
Verdict
The clearest difference is update cadence: StrengthLog at weekly against Caliber's fortnightly. StrengthLog also leads on review sentiment (88% vs 78%) and device support (4 vs 2). On price, rating, ratings volume and ads there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. StrengthLog sells 3 in-app purchases, starting at $16.90 per month and Caliber sells 18 in-app purchases, starting at $3.00 per month. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 4.9 for StrengthLog against 4.8 for Caliber. Both are backed by a comparable volume of ratings — 3.7K and 5.9K respectively. Written reviews are what separate them: 88% of StrengthLog's written reviews are positive against 78% of Caliber's.
StrengthLog ships an update weekly, Caliber fortnightly. The most recent releases landed on October 16, 2026 and October 15, 2026 respectively.
| Parameter | StrengthLog | Caliber |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (3.7K ratings) — better | 4.8 (5.9K ratings) |
| Positive reviews | 88.3% of reviews — better | 78.3% of reviews |
| Number of ratings | 3.7K | 5.9K — better |
| Update frequency | Weekly — better | Fortnightly |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | Free with in-app purchases |
| Devices | iPhone, iPad, iPod, Apple Watch — better | iPhone, iPod |
| Requires iOS | 15.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 158 MB | 67 MB |
| Age rating | 4+ | 12+ |
| Developer | Styrkelabbet AB | Caliber Fitness, Inc |
Customer experience
StrengthLog
Caliber
User reviews
StrengthLog
From 3.7K App Store ratingsWhat we love
- 👍 Easy to use
- 🚀 Intuitive interface
- 💪 Comprehensive workout tracking
- 📊 Detailed progress analytics
- 🎥 Helpful exercise videos
Room to improve
- 🔍 Cluttered main page
- 🐛 Occasional bugs and crashes
- 💰 Premium subscription is expensive
- ⌚ Apple Watch app issues
Caliber
From 5.9K App Store ratingsWhat we love
- 👍 Easy to use
- 🚀 Comprehensive workout tracking
- 💡 Customizable workouts
- 🔍 Detailed exercise instructions and videos
- 📊 Strength score and progress tracking
Room to improve
- 🐛 Occasional app crashes and bugs
- 🔍 Limited offline functionality
- 💰 Subscription model can be confusing
- 🔍 Inconsistent video quality and exercise explanations
- 🕰️ Frustrating user interface at times
Bugs and requests
StrengthLog
Reported bugs
3 issues- Disappearing workout data
- Inability to clear/reset workout history
- Inconsistent behavior when planning workouts for the same day
Requested features
4 requests- Ability to save and edit custom workout plans
- Seamless integration with Apple Health
- Community features like challenges and leaderboards
- More personalized workout recommendations
Caliber
Reported bugs
3 issues- Workout data loss when switching between online and offline mode
- Strength score not updating correctly in some cases
- Inability to log weight for certain exercises
Requested features
5 requests- Add ability to create and save custom exercises
- Integrate with more fitness tracking devices and apps
- Improve offline mode to allow full workout tracking
- Provide more flexibility in workout scheduling and planning
- Enhance strength score calculations and explanations
In-app purchases
StrengthLog
- StrengthLog Premium - 1 month14 Days trial$16.901 Month
- StrengthLog Premium - 3 months14 Days trial$37.903 Months
- StrengthLog Premium - 1 year14 Days trial$109.001 Year
Caliber
- Caliber Supporter (Monthly)$3.001 Month
- Caliber Supporter (Monthly)$5.001 Month
- Caliber Plus (Monthly)2 variants$6.001 Month
Show 15 moreShow fewer
- Caliber Plus (Monthly)7 Days trial$6.001 Month
- Caliber Supporter (Monthly)$7.001 Month
- Caliber Supporter (Monthly)$9.001 Month
- Caliber Plus (Monthly)2 variants$9.001 Month
- Caliber Plus (Monthly)2 variants$12.001 Month
- Caliber Pro (Monthly)$19.001 Month
- Caliber Pro (Monthly)7 Days trial$19.001 Month
- Caliber Plus (Yearly)7 Days trial$36.001 Year
- Caliber Pro (3 Months)$49.003 Months
- Caliber Pro (3 Months)7 Days trial$49.003 Months
- Caliber Plus (Yearly)7 Days trial2 variants$54.001 Year
- Caliber Plus (Yearly)7 Days trial2 variants$72.001 Year
- Caliber Plus (Yearly)1 Month trial$72.001 Year
- Caliber Pro (Yearly)$169.001 Year
- Caliber Pro (Yearly)7 Days trial$169.001 Year
Questions
Is StrengthLog free?
Is Caliber free?
Which has better reviews, StrengthLog or Caliber?
Do StrengthLog or Caliber have ads?
Which is updated more often, StrengthLog or Caliber?
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