# Flex 'n Burn vs Acro Kids

The clearest difference is device support: Acro Kids at 3 against Flex 'n Burn's 1. Acro Kids also leads on iOS requirement (13.0 vs 16.0). On price, update cadence, ads and in-app purchases there is nothing between them.

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

Flex 'n Burn ships an update every 3 weeks, Acro Kids monthly. The most recent releases landed on November 6, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Flex 'n Burn | Acro Kids |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (254 ratings)](https://appshunter.io/ios/app/flex-n-burn/id1434456191/reviews)** | — |
| Number of ratings | **254** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Monthly |
| Monetization | Ad-supported | — |
| Size | 38 MB | 58 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Mariana Tek Corporation](https://appshunter.io/developer/1178746980) | [The Trustee for Lifestyle Industries Trust](https://appshunter.io/developer/1717444843) |

## What reviewers say

### Flex 'n Burn

[App page](https://appshunter.io/ios/app/flex-n-burn/id1434456191)

Access fitness classes and manage your account with this app. It offers a 30-minute workout combining high-tech machines and HIIT to maximize results and save time. Join studio classes to experience an efficient and effective fitness routine.

**Highlights:** Book classes, Manage account, View locations, 30-minute workouts, HIIT training, CardioMuscular Workout™

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

**In-app purchases:** none


### Acro Kids

[App page](https://appshunter.io/ios/app/acro-kids/id6472668366)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is Flex 'n Burn free?

Flex 'n Burn is free to download, with no in-app purchases.

### Is Acro Kids free?

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

### Do Flex 'n Burn or Acro Kids have ads?

Neither Flex 'n Burn nor Acro Kids shows ads.

### Which is updated more often, Flex 'n Burn or Acro Kids?

Flex 'n Burn ships an update every 3 weeks, and Acro Kids monthly. Most recently, Flex 'n Burn was updated on November 6, 2026 and Acro Kids 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.*