# K2Sonnet vs Helium AI

The clearest difference is update cadence: Helium AI at every 6 days against K2Sonnet's every 7 months. 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.

K2Sonnet ships an update every 7 months, Helium AI every 6 days. The most recent releases landed on October 24, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | K2Sonnet | Helium AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/k2sonnet/id6753734747/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 6 days** |
| Size | 2 MB | 37 MB |
| Requires iOS | 17.6 | **16.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 17+ | 12+ |
| Developer | [Shanghai Jiyue Information Technology Co., Ltd.](https://appshunter.io/developer/1795192424) | [Neural Arc Inc](https://appshunter.io/developer/1845782405) |

## What reviewers say

### K2Sonnet

[App page](https://appshunter.io/ios/app/k2sonnet/id6753734747)

**Features:** macOS Compatibility

**In-app purchases:** none


### Helium AI

[App page](https://appshunter.io/ios/app/helium-ai/id6759967773)

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

**In-app purchases:** none


## Frequently asked questions

### Is K2Sonnet free?

K2Sonnet is free to download, with no in-app purchases.

### Is Helium AI free?

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

### Do K2Sonnet or Helium AI have ads?

Neither K2Sonnet nor Helium AI shows ads.

### Which is updated more often, K2Sonnet or Helium AI?

K2Sonnet ships an update every 7 months, and Helium AI every 6 days. Most recently, K2Sonnet was updated on October 24, 2026 and Helium AI on October 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.*