Comparison

Caliber vs StronkBar

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Caliber

This app offers science-based strength training with features for muscle building, weight loss, and fitness improvement. It provides personalized workouts, exercise tutorials, and community features. Optional upgrades offer advanced plans, nutrition targets, and 1-on-1 coaching.

Highlights
  • Personalized workout creation and tracking
  • Extensive exercise library with video tutorials
  • Workout Circles for training with friends
  • Apple Health integration
  • AI-powered training insights
  • Coach-designed training plans
  • Strength Score and balance metrics
Features
Read full description

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/

About

StronkBar

This strength training companion allows users to quickly log workouts with features like rest timers, a plate calculator, and automatic PR detection. It supports various training styles and offers data export, with an optional Pro version for advanced analytics and programming.

Highlights
  • Workout logging
  • Live Activities rest timer
  • Plate calculator
  • Estimated 1RM tracking
  • Personal Record detection
  • Supersets & Drop Sets
  • Data export
Features
Read full description

StronkBar is a workout logger for lifters who care about training, not app friction. Log workouts fast in a private app that syncs through iCloud and lets you export your full history anytime. No account. No subscription. No AI. --- ALREADY TRACKING ELSEWHERE? Keep your history intact. Import workout data from CSV exports (StrengthLog verified) and continue right where you left off.* COACH-MADE PROGRAMS? NO PROBLEM. Turn Excel spreadsheets into structured, trackable workouts. StronkBar's import system reads your program files and converts them into clean training sessions on your iPhone. Excel template is downloadable from within the app, with a guide on how to use it.* TRAINING STYLES THAT ADAPT Switch between Powerlifting, Olympic Weightlifting, or General Gym modes. The interface adjusts accordingly. Competition lifters see meet projections and periodization blocks, while gym users get a more streamlined experience. BUILT FOR THE PLATFORM StronkBar is a native Swift app. It's fast, works offline, and syncs privately through iCloud. Your training data stays on your devices. --- FEATURES • Live Activities Rest timer on your Lock Screen and Dynamic Island. Shows next set information such as weight, reps, and rest time. Glance at your phone between sets without needing to unlock your phone. • Plate Calculator Enter your working weight; see the exact plates to load. Supports custom bar weights and plate inventories. • Estimated 1RM Tracking Every logged set contributes to your estimated one-rep max. Unlock progression charts and trend analysis with StronkBar Pro. • Reps in Reserve (RIR) Log proximity to failure alongside weight and reps. RIR data feeds into effort analysis and progression decisions. • Personal Records Automatic PR detection across multiple rep ranges. Know instantly when you've hit a lifetime best. • Supersets & Drop Sets Tag sets as supersets, drop sets, or warmups. StronkBar handles the structure so you can focus on lifting. • Warmup Generator Generate progressive warmup sets based on your working weight. Configurable percentages, plate rounding, and optional empty-bar sets. • Exercise Library Over 300 exercises with full muscle group taxonomy. Create your own and track them alongside the built-in library. • Data Export Export your complete workout history as CSV at any time. Your data is always yours. --- STRONKBAR PRO StronkBar has a complete free core plan: unlimited logging, PRs, Live Activities, all tools, and iCloud sync. An optional one-time purchase unlocks deeper analytics and structured programming features: • E1RM progression charts and muscle group volume breakdown • RIR analysis and competition meet projections • Program import from Excel and CSV • Training blocks and periodization calendar • Smart Training Max auto-progression • Workout history import No subscriptions. No recurring fees. Buy once, own it forever. *Import features require StronkBar Pro. --- PRIVACY & DATA All data is stored locally on your device. iCloud sync is end-to-end encrypted — even Apple cannot read your workout history, and neither can we. There are no accounts, no servers, and no tracking. --- REQUIREMENTS iOS 18 or later. Dynamic Island features require compatible hardware. --- StronkBar is a solo-developed project, built in Stockholm, Sweden.

Screenshots

Caliber4 screens
StronkBar4 screens

Verdict

The call

The clearest difference is ratings volume: Caliber at 6.2K against StronkBar's 2. Caliber also leads on chart position (#148 vs unranked) and iOS requirement (15.1 vs 18.0). On price, rating, update cadence 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Caliber sells 8 in-app purchases, starting at $3.00 per month and StronkBar sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

StronkBar holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Caliber has 6.2K ratings behind it against 2, so its average is the more settled of the two.

UpkeepUpdate frequency

Caliber ships an update fortnightly, StronkBar every 3 weeks. The most recent releases landed on November 10, 2026 and October 31, 2026 respectively.

Scorecard3 real differences · 8 level
Caliber versus StronkBar: the parameters behind the verdict, then further details
ParameterCaliberStronkBar
PriceFreeFree
Rating4.8 (6.2K ratings)5.0 (2 ratings) — better
Positive reviews78.1% of reviews—
Number of ratings6.2K — better2
Update frequencyFortnightly — betterEvery 3 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
Best chart rank#148 — better—
DevicesiPhone, iPod — betteriPhone
Requires iOS15.1 — better18.0
Further details — not scored
Size60 MB14 MB
Age rating12+4+
DeveloperCaliber Fitness, IncNils Olivier

Customer experience

Caliber

All ratings6,093 ratings
Positive96.7%
Neutral1.1%
Negative2.2%
Written reviews530 reviews
Positive78.1%
Neutral6.2%
Negative15.7%

StronkBar

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

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

StronkBar

Not enough reviews yet to summarise bugs or requests.

In-app purchases

8 purchases

Caliber

Subscriptions8
  • Caliber Supporter (Monthly)$3.001 Month
  • Caliber Plus (Monthly)$6.001 Month
  • Caliber Plus (Monthly)$9.001 Month
Show 5 more
  • Caliber Plus (Monthly)2 variants$12.001 Month
  • Caliber Plus (Yearly)7 Days trial$36.001 Year
  • Caliber Plus (Yearly)7 Days trial$54.001 Year
  • Caliber Plus (Yearly)7 Days trial2 variants$72.001 Year
  • Caliber Plus (Yearly)1 Month trial$72.001 Year
1 purchases

StronkBar

One-time1
  • StronkBar Pro$11.99

Questions

Is Caliber free?
Caliber is free to download, with in-app purchases available.
Is StronkBar free?
StronkBar is free to download, with in-app purchases available.
Which has better reviews, Caliber or StronkBar?
StronkBar is rated higher. Caliber averages 4.8 out of 5 from 6.2K ratings, while StronkBar averages 5.0 from 2 ratings.
Do Caliber or StronkBar have ads?
Neither Caliber nor StronkBar shows ads.
Which is updated more often, Caliber or StronkBar?
Caliber ships an update fortnightly, and StronkBar every 3 weeks. Most recently, Caliber was updated on November 10, 2026 and StronkBar on October 31, 2026.

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