# PrimeThink vs Aster

The clearest difference is in-app purchases: PrimeThink at none against Aster's 4. PrimeThink also leads on ads (none vs shown). Aster's advantage is update cadence (weekly vs every 3 weeks). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Aster sells 4 in-app purchases, starting at $11.99 per month. PrimeThink asks for nothing beyond the download.

PrimeThink ships an update every 3 weeks, Aster weekly. The most recent releases landed on October 13, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | PrimeThink | Aster |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/aster-ai-chat-and-image-creator/id6806653780/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | **Weekly** |
| Monetization | — | Freemium |
| Size | 67 MB | 192 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 12+ |
| Developer | [Novaware Ltd](https://appshunter.io/developer/1502285848) | [Illia Pereviazko](https://appshunter.io/developer/6805598640) |

## What reviewers say

### PrimeThink

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

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

**In-app purchases:** none


### Aster

[App page](https://appshunter.io/ios/app/aster-ai-chat-and-image-creator/id6806653780)

This AI assistant helps you create images from descriptions, understand photos, and generate text for emails, summaries, and plans. It offers natural language conversation and photo analysis to turn your ideas into actionable steps.

**Highlights:** Image generation from text prompts, Photo editing and style transfer, Hands-free voice conversations, Photo and document analysis, Email drafting and text rewriting, Translation and summarization, Project planning and checklists

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Project Aster Plus | $11.99 | per month |
| Project Aster Pro | $24.99 | per month |
| Project Aster Max | $49.99 | per month |
| Project Aster Ultra | $99.99 | per month |


## Frequently asked questions

### Is PrimeThink free?

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

### Is Aster free?

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

### Do PrimeThink or Aster have ads?

Aster shows ads; PrimeThink does not.

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

PrimeThink ships an update every 3 weeks, and Aster weekly. Most recently, PrimeThink was updated on October 13, 2026 and Aster on October 17, 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.*