# Flex vs The Plus Set

The clearest difference is in-app purchases: The Plus Set at none against Flex's 2. The Plus Set also leads on update cadence (every 2 weeks vs every 3 months). Flex's advantage is iOS requirement (13.4 vs 17.0). On price, ads 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. The Plus Set asks for nothing beyond the download.

Flex ships an update every 3 months, The Plus Set every 2 weeks. The most recent releases landed on September 29, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Flex | The Plus Set |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/the-plus-set/id6758230246/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 weeks** |
| Monetization | — | Free |
| Size | 70 MB | 2 MB |
| Requires iOS | **13.4** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 17+ | 17+ |
| Developer | [CAPNKLUTCH](https://appshunter.io/developer/1772032590) | [Vishal Agrawal](https://appshunter.io/developer/1871639530) |

## 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 |


### The Plus Set

[App page](https://appshunter.io/ios/app/the-plus-set/id6758230246)

This app simplifies tracking your Wendler 5/3/1 workouts, including Boring But Big assistance. It automatically calculates weights, tracks progress, and features a built-in rest timer. Focus on your training with smart progression and flexible customization.

**Highlights:** Automatic weight calculation, Plate loading guidance, Warmup and working set tracking, AMRAP set prompts, Estimated 1RM calculation, Built-in rest timer, Calendar workout history

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Flex free?

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

### Is The Plus Set free?

The Plus Set is free to download, with no in-app purchases.

### Do Flex or The Plus Set have ads?

Neither Flex nor The Plus Set shows ads.

### Which is updated more often, Flex or The Plus Set?

Flex ships an update every 3 months, and The Plus Set every 2 weeks. Most recently, Flex was updated on September 29, 2026 and The Plus Set on October 5, 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.*