# Bladenbox vs KNSB Rating Viewer

The clearest difference is in-app purchases: KNSB Rating Viewer at none against Bladenbox's 10. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Bladenbox sells 10 in-app purchases, starting at $2.99 per month. KNSB Rating Viewer asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on October 26, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Bladenbox | KNSB Rating Viewer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | Every 3 months |
| Size | 82 MB | 19 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [B.V. Bondis](https://appshunter.io/developer/1518814477) | [Koninklijke Nederlandse Schaakbond](https://appshunter.io/developer/1735946593) |

## What reviewers say

### Bladenbox

[App page](https://appshunter.io/ios/app/bladenbox/id1105377702)

**Features:** macOS Compatibility

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Maand abonnement Oase | $2.99 | per month |
| Kiind 22 BLOEI | $7.99 | one-time |
| Kiind 23 SPELEN | $7.99 | one-time |
| Kiind 24 OER | $7.99 | one-time |
| Kiind magazine EB21 | $10.99 | one-time |
| Kiind magazine EB2 | $10.99 | one-time |
| Oase 107 | $19.99 | one-time |
| Oase 109 | $19.99 | one-time |
| Oase 108 | $19.99 | one-time |
| Oase 110 | $19.99 | one-time |


### KNSB Rating Viewer

[App page](https://appshunter.io/ios/app/knsb-rating-viewer/id6479428850)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Bladenbox free?

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

### Is KNSB Rating Viewer free?

KNSB Rating Viewer is free to download, with no in-app purchases.

### Do Bladenbox or KNSB Rating Viewer have ads?

Neither Bladenbox nor KNSB Rating Viewer shows ads.

### Which is updated more often, Bladenbox or KNSB Rating Viewer?

Bladenbox ships an update every 3 months, and KNSB Rating Viewer every 3 months. Most recently, Bladenbox was updated on October 26, 2026 and KNSB Rating Viewer on October 25, 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.*