# Principia vs DeepRead

The clearest difference is in-app purchases: DeepRead at none against Principia's 3. DeepRead also leads on ads (none vs shown) and iOS requirement (13.0 vs 17.6). On price and device support there is nothing between them.

Both are free to download. Principia sells 3 one-off in-app purchases. DeepRead asks for nothing beyond the download.

## The numbers

| Metric | Principia | DeepRead |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.0 (2 ratings)](https://appshunter.io/ios/app/principia-smart-ai-studio/id6740216432/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | — |
| Monetization | Ad-supported | — |
| Size | 26 MB | 9 MB |
| Requires iOS | 17.6 | **13.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Edgar Zuniga](https://appshunter.io/developer/1647129574) | [江峰 郝](https://appshunter.io/developer/1778695093) |

## What reviewers say

### Principia

[App page](https://appshunter.io/ios/app/principia-smart-ai-studio/id6740216432)

A private, customizable AI assistant for chat, writing, coding, and image analysis. It adapts to your needs, allowing you to choose AI models, set personalities, and keep your data local and private. Create content, code, and learn faster with this flexible AI tool.

**Highlights:** Customizable AI models, Personalized AI behavior, Context-aware chat, Image analysis and insights, Content creation, Code generation and debugging, Learning and research tools, Privacy-first, local storage

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 50 Credits | $0.99 | one-time |
| 150 Credits | $1.99 | one-time |
| 600 Credits | $6.99 | one-time |


### DeepRead

[App page](https://appshunter.io/ios/app/deepread-ebook-reader-and-lib/id6744522947)

**In-app purchases:** none


## Frequently asked questions

### Is Principia free?

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

### Is DeepRead free?

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

### Do Principia or DeepRead have ads?

Principia shows ads; DeepRead does not.

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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.*