# K2Sonnet vs Liminal AI

The clearest difference is update cadence: Liminal AI at every 2 months 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, Liminal AI every 2 months. Both last shipped on October 2, 2026.

## The numbers

| Metric | K2Sonnet | Liminal AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/liminal-ai/id6754858160/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 2 months** |
| Monetization | — | Free |
| Size | 2 MB | 34 MB |
| Requires iOS | **17.6** | 18 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 17+ | 17+ |
| Developer | [Shanghai Jiyue Information Technology Co., Ltd.](https://appshunter.io/developer/1795192424) | [Liminal AI Inc.](https://appshunter.io/developer/1792552096) |

## What reviewers say

### K2Sonnet

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Liminal AI

[App page](https://appshunter.io/ios/app/liminal-ai/id6754858160)

This platform provides secure, unlimited access to leading AI models for regulated enterprises. It ensures data protection and compliance while enabling seamless AI integration into workflows. Users can build custom assistants and gain insights into AI usage for business value.

**Highlights:** Secure access to leading AI models, Automatic sensitive data detection and masking, Centralized AI governance and oversight, Integration with internal data sources (RAG), Customizable multi-model AI assistants, AI usage insights and ROI measurement

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is K2Sonnet free?

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

### Is Liminal AI free?

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

### Do K2Sonnet or Liminal AI have ads?

Neither K2Sonnet nor Liminal AI shows ads.

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

K2Sonnet ships an update every 7 months, and Liminal AI every 2 months. Most recently, K2Sonnet was updated on October 2, 2026 and Liminal AI on October 2, 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.*