# Sentiens vs Chatmark

The clearest difference is update cadence: Sentiens at every 2 days against Chatmark's every 6 weeks. 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.

Sentiens ships an update every 2 days, Chatmark every 6 weeks. The most recent releases landed on October 31, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Sentiens | Chatmark |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/sentiens/id6765820679/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 6 weeks |
| Monetization | Free | — |
| Size | 145 MB | 27 MB |
| Requires iOS | 17.0 | **16** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [BK Kejera](https://appshunter.io/developer/1707608873) | [Taeeun Kim](https://appshunter.io/developer/1580920574) |

## What reviewers say

### Sentiens

[App page](https://appshunter.io/ios/app/sentiens/id6765820679)

Create and customize your own private AI companion with distinct personalities, evolving memories, and adaptive behaviors. This offline platform offers deep control over your AI's intelligence and data ownership, running entirely on your device.

**Highlights:** Fully offline AI experience, Create and customize Sentien personalities, Dynamic, evolving memory system, Neural voice customization, Vision intelligence for image understanding, Choice of AI model sizes, Private by design with data ownership

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

**In-app purchases:** none


### Chatmark

[App page](https://appshunter.io/ios/app/chatmark/id6768804618)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Sentiens free?

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

### Is Chatmark free?

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

### Do Sentiens or Chatmark have ads?

Neither Sentiens nor Chatmark shows ads.

### Which is updated more often, Sentiens or Chatmark?

Sentiens ships an update every 2 days, and Chatmark every 6 weeks. Most recently, Sentiens was updated on October 31, 2026 and Chatmark on October 18, 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.*