# Wattwheels vs Flex

The clearest difference is update cadence: Flex at every 3 weeks against Wattwheels's every 16 months. Wattwheels's advantage is iOS requirement (13.0 vs 15.1). On price, ads, in-app purchases and device support there is nothing between them.

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

Wattwheels ships an update every 16 months, Flex every 3 weeks. The most recent releases landed on October 7, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Wattwheels | Flex |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 16 months | **Every 3 weeks** |
| Size | 270 MB | 108 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [James Zwaagman](https://appshunter.io/developer/1726608285) | [Payfi](https://appshunter.io/developer/1805427160) |

## What reviewers say

### Wattwheels

[App page](https://appshunter.io/ios/app/wattwheels/id6476404161)

**Features:** macOS Compatibility

**In-app purchases:** none


### Flex

[App page](https://appshunter.io/ios/app/flex-rent-in-mins/id6744620628)

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

**In-app purchases:** none


## Frequently asked questions

### Is Wattwheels free?

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

### Is Flex free?

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

### Do Wattwheels or Flex have ads?

Neither Wattwheels nor Flex shows ads.

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

Wattwheels ships an update every 16 months, and Flex every 3 weeks. Most recently, Wattwheels was updated on October 7, 2026 and Flex on October 18, 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.*