# Contex.st vs IdeAI

The clearest difference is in-app purchases: Contex.st at none against IdeAI's 4. Contex.st also leads on iOS requirement (18.4 vs 26.0). IdeAI's advantage is update cadence (every 3 days vs every 4 weeks). On price, ads and device support there is nothing between them.

Both are free to download. IdeAI sells 4 in-app purchases, starting at $4.99 per month. Contex.st asks for nothing beyond the download.

Contex.st ships an update every 4 weeks, IdeAI every 3 days. The most recent releases landed on September 13, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | Contex.st | IdeAI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (3 ratings)](https://appshunter.io/ios/app/ideai/id6754496063/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Every 3 days** |
| Monetization | — | Freemium |
| Size | 128 MB | 38 MB |
| Requires iOS | **18.4** | 26.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 12+ |
| Developer | [Memetic Research Laboratories LLC](https://appshunter.io/developer/1814737557) | [Aleksander Allen](https://appshunter.io/developer/1848492528) |

## What reviewers say

### Contex.st

[App page](https://appshunter.io/ios/app/contexst/id6745994409)

**In-app purchases:** none


### IdeAI

[App page](https://appshunter.io/ios/app/ideai/id6754496063)

This app creates a private, on-device memory layer for your digital history, allowing you to visualize cognitive patterns and provide AI tools with full context. It offers an encrypted, navigable atlas of your thoughts and conversations, ensuring data sovereignty and zero-knowledge privacy.

**Highlights:** On-device encrypted memory layer, Visualize cognitive patterns and thinking clusters, Provide AI tools with full conversation context, Import digital history (journals, social media, AI chats), Zero-knowledge privacy with AES-256-GCM encryption, Data export and portability

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| DataShard | $4.99 | per month |
| Max | $24.99 | per month |
| DataShard | $49.99 | per year |
| Max | $199.99 | per year |


## Frequently asked questions

### Is Contex.st free?

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

### Is IdeAI free?

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

### Do Contex.st or IdeAI have ads?

Neither Contex.st nor IdeAI shows ads.

### Which is updated more often, Contex.st or IdeAI?

Contex.st ships an update every 4 weeks, and IdeAI every 3 days. Most recently, Contex.st was updated on September 13, 2026 and IdeAI on September 11, 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.*