# BuiltDiff vs HardLab

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.

Both are free to download. HardLab sells 2 in-app purchases, starting at $4.99 per month. BuiltDiff asks for nothing beyond the download.

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.

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

## The numbers

| Metric | BuiltDiff | HardLab |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/builtdiff/id6478643263/reviews) | [5.0 (3 ratings)](https://appshunter.io/ios/app/hardlab/id6479370656/reviews) |
| Number of ratings | 2 | **3** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 weeks | Every 2 weeks |
| Monetization | **Free** | Ad-supported |
| Size | 3 MB | 85 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Timmy Nguyen](https://appshunter.io/developer/1679678398) | [Credo Tech LLC](https://appshunter.io/developer/1502861735) |

## What reviewers say

### BuiltDiff

[App page](https://appshunter.io/ios/app/builtdiff/id6478643263)

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:** macOS Compatibility

**In-app purchases:** none


### HardLab

[App page](https://appshunter.io/ios/app/hardlab/id6479370656)

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:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| HardLab Pro | $4.99 | per month |
| HardLab Pro | $29.99 | per year |


## Frequently asked 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.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*