# Flex vs TheBuild

The clearest difference is ads: Flex at none against TheBuild's shown. Flex also leads on iOS requirement (13.4 vs 15.1). TheBuild's advantage is update cadence (every 2 weeks vs every 3 months). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Flex sells 2 in-app purchases, starting at $13.99 per month and TheBuild sells 3 in-app purchases, starting at $1.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Flex ships an update every 3 months, TheBuild every 2 weeks. The most recent releases landed on October 15, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Flex | TheBuild |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/thebuild-reel-workout-tracker/id6761310726/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Every 2 weeks** |
| Monetization | — | Subscription |
| Size | 70 MB | 78 MB |
| Requires iOS | **13.4** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [CAPNKLUTCH](https://appshunter.io/developer/1772032590) | [Sabri Ben Hmida](https://appshunter.io/developer/1848540811) |

## What reviewers say

### Flex

[App page](https://appshunter.io/ios/app/flex-stretch/id6736611703)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $13.99 | per month |
| Premium Annual | $39.99 | per year |


### TheBuild

[App page](https://appshunter.io/ios/app/thebuild-reel-workout-tracker/id6761310726)

Transform social media workout videos into structured, followable routines. This app analyzes video links to create set-by-set plans, track your progress, and build training streaks. Log your actual performance and discover new workouts.

**Highlights:** AI video analysis for workout creation, Structured set-by-set workout plans, Customizable exercise details, Detailed workout logging, Progress tracking with heatmaps and streaks, Workout exploration and saving, Dark interface for gym focus

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| TheBuild Premium | $1.99 | per 7 days |
| TheBuild Premium | $6.99 | per month |
| TheBuild Premium | $59.99 | per year |


## Frequently asked questions

### Is Flex free?

Flex is free to download, with in-app purchases available.

### Is TheBuild free?

TheBuild is free to download, with in-app purchases available.

### Do Flex or TheBuild have ads?

TheBuild shows ads; Flex does not.

### Which is updated more often, Flex or TheBuild?

Flex ships an update every 3 months, and TheBuild every 2 weeks. Most recently, Flex was updated on October 15, 2026 and TheBuild on October 2, 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.*