# KnowBot vs Stella

The clearest difference is in-app purchases: Stella at none against KnowBot's 3. KnowBot's advantage is update cadence (every 4 days vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. KnowBot sells 3 in-app purchases, starting at $1.99 per month. Stella asks for nothing beyond the download.

KnowBot ships an update every 4 days, Stella every 2 months. The most recent releases landed on August 29, 2026 and June 5, 2026 respectively.

## The numbers

| Metric | KnowBot | Stella |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/stella-ai-assistant/id6450225779/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 2 months |
| Monetization | — | Free |
| Size | 36 MB | 33 MB |
| Requires iOS | 12.0 | **11.0** |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [钤 朱](https://appshunter.io/developer/1577772267) | [NorthSoft HB](https://appshunter.io/developer/1691511281) |

## What reviewers say

### KnowBot

[App page](https://appshunter.io/ios/app/knowbot-ai-chat-robot-client/id6448847594)

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| VIP for one month | $1.99 | per month |
| VIP for six months | $9.99 | per 6 months |
| VIP for one year | $14.99 | per year |


### Stella

[App page](https://appshunter.io/ios/app/stella-ai-assistant/id6450225779)

This AI assistant enhances productivity through intelligent conversations. It offers a seamless, private chat experience without requiring logins or fees. Powered by advanced AI, it aims to transform task management and communication.

**Highlights:** Intelligent conversation, Productivity enhancement, Private chat interactions, No login required, Free to use

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is KnowBot free?

KnowBot is free to download, with in-app purchases available.

### Is Stella free?

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

### Do KnowBot or Stella have ads?

Neither KnowBot nor Stella shows ads.

### Which is updated more often, KnowBot or Stella?

KnowBot ships an update every 4 days, and Stella every 2 months. Most recently, KnowBot was updated on August 29, 2026 and Stella on June 5, 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.*