# FlexWheeler Development System vs KBody

The clearest difference is update cadence: KBody at every 3 months against FlexWheeler Development System's every 50 months. FlexWheeler Development System's advantage is iOS requirement (13.4 vs 15.1). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. FlexWheeler Development System sells 1 one-off in-app purchase and KBody sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

FlexWheeler Development System ships an update every 50 months, KBody every 3 months. The most recent releases landed on September 18, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | FlexWheeler Development System | KBody |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 50 months | **Every 3 months** |
| Size | 25 MB | 22 MB |
| Requires iOS | **13.4** | 15.1 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [The GOAT 33, Inc.](https://appshunter.io/developer/1550536576) | [KBODY PERSONAL SPORT COMPANY](https://appshunter.io/developer/1795703808) |

## What reviewers say

### FlexWheeler Development System

[App page](https://appshunter.io/ios/app/flexwheeler-development-system/id1550536574)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Training and Nutrition Package | $299.99 | one-time |


### KBody

[App page](https://appshunter.io/ios/app/kbody/id6741807318)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Custom Workout & Meal Plans | $749.99 | one-time |


## Frequently asked questions

### Is FlexWheeler Development System free?

FlexWheeler Development System is free to download, with in-app purchases available.

### Is KBody free?

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

### Do FlexWheeler Development System or KBody have ads?

Neither FlexWheeler Development System nor KBody shows ads.

### Which is updated more often, FlexWheeler Development System or KBody?

FlexWheeler Development System ships an update every 50 months, and KBody every 3 months. Most recently, FlexWheeler Development System was updated on September 18, 2026 and KBody on October 1, 2026.

---

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