# BioSyn vs The Foundation Flex

The clearest difference is update cadence: BioSyn at every 2 months against The Foundation Flex's every 4 months. BioSyn also leads on iOS requirement (13 vs 15.6). 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.

BioSyn ships an update every 2 months, The Foundation Flex every 4 months. The most recent releases landed on September 17, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | BioSyn | The Foundation Flex |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 4 months |
| Size | 26 MB | 60 MB |
| Requires iOS | **13** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [THE IDEA PORTAL DEVELOPMENT (PTY) LTD](https://appshunter.io/developer/1793484505) | [Darren Woods](https://appshunter.io/developer/993279856) |

## What reviewers say

### BioSyn

[App page](https://appshunter.io/ios/app/biosyn/id1617772823)

**Features:** macOS Compatibility

**In-app purchases:** none


### The Foundation Flex

[App page](https://appshunter.io/ios/app/the-foundation-flex/id6469048218)

**In-app purchases:** none


## Frequently asked questions

### Is BioSyn free?

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

### Is The Foundation Flex free?

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

### Do BioSyn or The Foundation Flex have ads?

Neither BioSyn nor The Foundation Flex shows ads.

### Which is updated more often, BioSyn or The Foundation Flex?

BioSyn ships an update every 2 months, and The Foundation Flex every 4 months. Most recently, BioSyn was updated on September 17, 2026 and The Foundation Flex on September 11, 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.*