# BlueTwo vs Carson ND

The clearest difference is update cadence: Carson ND at every 9 months against BlueTwo's every 24 months. BlueTwo's advantage is iOS requirement (8.1 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.

BlueTwo ships an update every 24 months, Carson ND every 9 months. The most recent releases landed on September 30, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | BlueTwo | Carson ND |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 24 months | **Every 9 months** |
| Size | 6 MB | 23 MB |
| Requires iOS | **8.1** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Wilhelm Koch GmbH](https://appshunter.io/developer/531301051) | [KAT Marketing](https://appshunter.io/developer/1454852114) |

## What reviewers say

### BlueTwo

[App page](https://appshunter.io/ios/app/bluetwo/id1055260947)

**Features:** macOS Compatibility

**In-app purchases:** none


### Carson ND

[App page](https://appshunter.io/ios/app/carson-nd/id1629696057)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is BlueTwo free?

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

### Is Carson ND free?

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

### Do BlueTwo or Carson ND have ads?

Neither BlueTwo nor Carson ND shows ads.

### Which is updated more often, BlueTwo or Carson ND?

BlueTwo ships an update every 24 months, and Carson ND every 9 months. Most recently, BlueTwo was updated on September 30, 2026 and Carson ND on October 7, 2026.

---

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