# SAI CAB vs PDF AI

The clearest difference is in-app purchases: SAI CAB at none against PDF AI's 5. SAI CAB also leads on ads (none vs shown) and iOS requirement (13.4 vs 15.0). On price, update cadence and device support there is nothing between them.

Both are free to download. PDF AI sells 5 in-app purchases, starting at $7.99 per 7 days. SAI CAB asks for nothing beyond the download.

SAI CAB ships an update fortnightly, PDF AI every 3 weeks. The most recent releases landed on October 25, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | SAI CAB | PDF AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.8 (163 ratings)](https://appshunter.io/ios/app/pdf-ai-editor-scanner-chat/id6581489325/reviews)** |
| Number of ratings | — | **163** |
| Positive reviews | — | 88.4% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Monetization | — | Free with in-app purchases |
| Size | 56 MB | 169 MB |
| Requires iOS | **13.4** | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [AHASOLAR TECHNOLOGIES LIMITED](https://appshunter.io/developer/1632224285) | [Yang Yang](https://appshunter.io/developer/1756128958) |

## What reviewers say

### SAI CAB

[App page](https://appshunter.io/ios/app/sai-cab/id6462161229)

**Features:** macOS Compatibility

**In-app purchases:** none


### PDF AI

[App page](https://appshunter.io/ios/app/pdf-ai-editor-scanner-chat/id6581489325)

This application offers a comprehensive suite of AI-powered tools for managing PDF documents. Users can edit text and images, generate AI summaries, convert files to various formats, and securely sign documents. It prioritizes speed and privacy with local processing and encryption.

**Highlights:** Edit PDF text and images, AI-powered summaries and highlights, Annotate and collaborate on documents, Fill and e-sign forms, Convert PDFs to Word, Excel, PPT, Images, TXT, Secure offline scanning and organization

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly VIP | $7.99 | per 7 days |
| Weekly VIP | $9.99 | per 7 days |
| Weekly VIP | $9.99 | per 7 days |
| Monthly VIP | $14.99 | per month |
| Yearly VIP | $59.99 | per year |


## Frequently asked questions

### Is SAI CAB free?

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

### Is PDF AI free?

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

### Do SAI CAB or PDF AI have ads?

PDF AI shows ads; SAI CAB does not.

### Which is updated more often, SAI CAB or PDF AI?

SAI CAB ships an update fortnightly, and PDF AI every 3 weeks. Most recently, SAI CAB was updated on October 25, 2026 and PDF AI on October 30, 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.*