Comparison

BuiltDiff vs HardLab

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

Head to head
About

BuiltDiff

Log your weightlifting sets and reps with a clean, distraction-free interface. Visualize your progress with charts and personalize the app's appearance. Enjoy offline functionality and a sign-up-free experience for efficient workouts.

Highlights
  • Log lifts, sets, and reps
  • Create custom workout routines
  • Offline functionality
  • Sign-up-free experience
  • Visualize progress with charts
  • Personalize app appearance
Features
Read full description

Track your lifts, sets, and reps and watch your strength soar! Enjoy a clean and simple design that makes navigation a breeze. Focus on your workout without any distractions, making your lifting sessions efficient and effective. Features: - watchOS companion app - Tailor your own workout routines - No internet connection needed - Sign up-free experience - Convenient keyboard add-ons for efficient logging of weights and reps - Permanent recording of all your lifts - Visualize your lifting progression through charts - Select your preferred color and personalize the app to make it uniquely yours

About

HardLab

This app helps you track workouts, meals, and body measurements to visualize your fitness progress. It offers an offline-first experience with features like a rest timer, exercise library, and AI-powered meal logging. Syncs with Apple Health for automatic data import.

Highlights
  • Workout logging with rest timer
  • Exercise library with muscle targeting
  • AI-powered meal and nutrition tracking
  • Body measurement and progress photo logging
  • Interactive progress charts and trends
  • Apple Health integration
  • Social sharing and friend motivation
Features
Read full description

HardLab is your all-in-one fitness companion — built to track every workout, meal, and measurement, and to actually show you the progress you're making. Whether you're lifting to get stronger, dialing in your nutrition, or just trying to move more, HardLab keeps everything in one fast, offline-first app that works even when you're off the grid. TRAIN SMARTER • Build routines and log workouts set-by-set with a built-in rest timer • Browse a full exercise library with muscle-group targeting • Track personal records and celebrate PR moments • See workout insights and weekly snapshots of your training EAT WITH INTENTION • Log meals in seconds — type what you ate or snap a photo and let AI do the rest • Track calories and macros with clear, visual nutrition rings • Set water and macro goals and watch them update through the day TRACK YOUR PROGRESS • Log body measurements and attach progress photos • Visualize trends over any date range with interactive charts • Set goals and see exactly when you hit them • Monitor steps and sleep right from your Home screen SYNC WITH APPLE HEALTH • Connect Apple Health to automatically bring in steps, workouts, and activity • Your data stays current without manual entry STAY CONNECTED • Follow friends, share your progress, and stay motivated together MADE FOR YOU • Light and dark themes • Imperial or metric units, your choice • Sound and haptics controls • Works great whether you have an account or just want to start tracking right away Download HardLab and start building the strongest version of you. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

BuiltDiff4 screens
HardLab4 screens

Verdict

The call

The clearest difference is in-app purchases: BuiltDiff at none against HardLab's 2. BuiltDiff also leads on ads (none vs shown). HardLab's advantage is iOS requirement (15.1 vs 17.0). On price, rating, ratings volume and update cadence 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. HardLab sells 2 in-app purchases, starting at $4.99 per month. BuiltDiff asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for BuiltDiff against 5.0 for HardLab. Both are backed by a comparable volume of ratings — 2 and 3 respectively.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on June 11, 2026 and September 24, 2026 respectively.

Scorecard4 real differences · 5 level
BuiltDiff versus HardLab: the parameters behind the verdict, then further details
ParameterBuiltDiffHardLab
PriceFreeFree
Rating5.0 (2 ratings)5.0 (3 ratings)
Number of ratings23 — better
Update frequencyEvery 2 weeksEvery 2 weeks
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterAd-supported
DevicesiPhone, iPad, Apple WatchiPhone, iPad, iPod
Requires iOS17.015.1 — better
Further details — not scored
Size3 MB85 MB
Age rating4+4+
DeveloperTimmy NguyenCredo Tech LLC

Customer experience

BuiltDiff

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

HardLab

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

BuiltDiff

No in-app purchases

2 purchases

HardLab

Subscriptions2
  • HardLab Pro$4.991 Month
  • HardLab Pro$29.991 Year

Questions

Is BuiltDiff free?
BuiltDiff is free to download, with no in-app purchases.
Is HardLab free?
HardLab is free to download, with in-app purchases available.
Which has better reviews, BuiltDiff or HardLab?
BuiltDiff and HardLab are both rated 5.0 out of 5 on the App Store, from 2 and 3 ratings respectively.
Do BuiltDiff or HardLab have ads?
HardLab shows ads; BuiltDiff does not.
Which is updated more often, BuiltDiff or HardLab?
BuiltDiff ships an update every 2 weeks, and HardLab every 2 weeks. Most recently, BuiltDiff was updated on June 11, 2026 and HardLab on September 24, 2026.

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