# Optimize Fitness vs BuiltDiff

The clearest difference is update cadence: BuiltDiff at every 2 weeks against Optimize Fitness's every 3 months. Optimize Fitness's advantage is iOS requirement (13.0 vs 17.0). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for Optimize Fitness against 5.0 for BuiltDiff. Both are backed by a comparable volume of ratings — 5 and 2 respectively.

Optimize Fitness ships an update every 3 months, BuiltDiff every 2 weeks. Both last shipped on November 4, 2026.

## The numbers

| Metric | Optimize Fitness | BuiltDiff |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (5 ratings)](https://appshunter.io/ios/app/optimize-fitness/id6472675277/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/builtdiff/id6478643263/reviews) |
| Number of ratings | **5** | 2 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 weeks** |
| Monetization | Free | Free |
| Size | 19 MB | 3 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Robert Harrington](https://appshunter.io/developer/1717468423) | [Timmy Nguyen](https://appshunter.io/developer/1679678398) |

## What reviewers say

### Optimize Fitness

[App page](https://appshunter.io/ios/app/optimize-fitness/id6472675277)

This application helps users track their workouts with an intuitive interface and an extensive exercise library. It includes features like a rest timer, weight tracking, and personalized calorie insights to support fitness goals. Users can also create unlimited workout templates and monitor exercise progression.

**Highlights:** Intuitive workout tracking, Extensive exercise library, Built-in rest timer, Weight and progression tracking, Personalized calorie insights, Unlimited workout templates

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Optimize Fitness free?

Optimize Fitness is free to download, with no in-app purchases.

### Is BuiltDiff free?

BuiltDiff is free to download, with no in-app purchases.

### Which has better reviews, Optimize Fitness or BuiltDiff?

Optimize Fitness and BuiltDiff are both rated 5.0 out of 5 on the App Store, from 5 and 2 ratings respectively.

### Do Optimize Fitness or BuiltDiff have ads?

Neither Optimize Fitness nor BuiltDiff shows ads.

### Which is updated more often, Optimize Fitness or BuiltDiff?

Optimize Fitness ships an update every 3 months, and BuiltDiff every 2 weeks. Most recently, Optimize Fitness was updated on November 4, 2026 and BuiltDiff on November 4, 2026.

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