# PrimeThink vs Aitopus

The clearest difference is iOS requirement: PrimeThink at 15.0 against Aitopus's 26.5. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

PrimeThink ships an update every 3 weeks, Aitopus every 5 weeks. The most recent releases landed on October 30, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | PrimeThink | Aitopus |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.0 (1 ratings)](https://appshunter.io/ios/app/aitopus-private-ai-assistant/id6763249941/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 5 weeks |
| Monetization | — | Free |
| Size | 67 MB | 73 MB |
| Requires iOS | **15.0** | 26.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 17+ | 17+ |
| Developer | [Novaware Ltd](https://appshunter.io/developer/1502285848) | [GETADEV LTD](https://appshunter.io/developer/1895233129) |

## What reviewers say

### PrimeThink

[App page](https://appshunter.io/ios/app/primethink/id6744278915)

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

**In-app purchases:** none


### Aitopus

[App page](https://appshunter.io/ios/app/aitopus-private-ai-assistant/id6763249941)

Engage in private AI conversations, analyze your documents, and perform web searches with verifiable sources. This application offers both offline local models and the flexibility to connect your own cloud API keys for enhanced capabilities. Your data remains on your device, ensuring privacy by default.

**Highlights:** Private AI chat, Document analysis (PDF, Word, Excel), Web search with source verification, Voice dictation, Offline local AI models, Connect cloud API keys, Local data storage

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is PrimeThink free?

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

### Is Aitopus free?

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

### Do PrimeThink or Aitopus have ads?

Neither PrimeThink nor Aitopus shows ads.

### Which is updated more often, PrimeThink or Aitopus?

PrimeThink ships an update every 3 weeks, and Aitopus every 5 weeks. Most recently, PrimeThink was updated on October 30, 2026 and Aitopus on November 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.*