# CSI Mobile (Legacy) vs Knuut

The clearest difference is update cadence: Knuut at fortnightly against CSI Mobile (Legacy)'s every 11 months. CSI Mobile (Legacy)'s advantage is iOS requirement (10.0 vs 16.4). 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.

CSI Mobile (Legacy) ships an update every 11 months, Knuut fortnightly. The most recent releases landed on October 26, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | CSI Mobile (Legacy) | Knuut |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 11 months | **Fortnightly** |
| Size | 11 MB | 63 MB |
| Requires iOS | **10.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [CSI Helsinki](https://appshunter.io/developer/1039812427) | [Knuut](https://appshunter.io/developer/1855299110) |

## What reviewers say

### CSI Mobile (Legacy)

[App page](https://appshunter.io/ios/app/csi-mobile-legacy/id1039812428)

**Features:** macOS Compatibility

**In-app purchases:** none


### Knuut

[App page](https://appshunter.io/ios/app/knuut/id6755654615)

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

**In-app purchases:** none


## Frequently asked questions

### Is CSI Mobile (Legacy) free?

CSI Mobile (Legacy) is free to download, with no in-app purchases.

### Is Knuut free?

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

### Do CSI Mobile (Legacy) or Knuut have ads?

Neither CSI Mobile (Legacy) nor Knuut shows ads.

### Which is updated more often, CSI Mobile (Legacy) or Knuut?

CSI Mobile (Legacy) ships an update every 11 months, and Knuut fortnightly. Most recently, CSI Mobile (Legacy) was updated on October 26, 2026 and Knuut 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.*