# FlexApp Katwijk vs bo.

The clearest difference is update cadence: bo. at every 2 months against FlexApp Katwijk's every 19 months. FlexApp Katwijk's advantage is iOS requirement (11.0 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.

FlexApp Katwijk ships an update every 19 months, bo. every 2 months. The most recent releases landed on September 22, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | FlexApp Katwijk | bo. |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 19 months | **Every 2 months** |
| Size | 37 MB | 64 MB |
| Requires iOS | **11.0** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Approxx B.V.](https://appshunter.io/developer/1340312349) | [Cobee B.V.](https://appshunter.io/developer/1310435732) |

## What reviewers say

### FlexApp Katwijk

[App page](https://appshunter.io/ios/app/flexapp-katwijk/id1588364368)

**In-app purchases:** none


### bo.

[App page](https://appshunter.io/ios/app/bo/id6717586342)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is FlexApp Katwijk free?

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

### Is bo. free?

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

### Do FlexApp Katwijk or bo. have ads?

Neither FlexApp Katwijk nor bo. shows ads.

### Which is updated more often, FlexApp Katwijk or bo.?

FlexApp Katwijk ships an update every 19 months, and bo. every 2 months. Most recently, FlexApp Katwijk was updated on September 22, 2026 and bo. on September 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.*