# Quantum AI vs PDF Reader

The clearest difference is in-app purchases: Quantum AI at none against PDF Reader's 2. Quantum AI also leads on ads (none vs shown) and update cadence (every 4 days vs every 3 weeks). PDF Reader's advantage is chart position (#189 vs unranked). On price and device support there is nothing between them.

Both are free to download. PDF Reader sells 2 in-app purchases, starting at $9.99 per 7 days. Quantum AI asks for nothing beyond the download.

Quantum AI ships an update every 4 days, PDF Reader every 3 weeks. The most recent releases landed on October 28, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Quantum AI | PDF Reader |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.3 (105 ratings)](https://appshunter.io/ios/app/pdf-reader-edit-and-ocr-scan/id6774545766/reviews)** |
| Number of ratings | — | **105** |
| Positive reviews | — | 75.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 4 days** | Every 3 weeks |
| Monetization | — | Free with in-app purchases |
| Best chart rank | — | **#189** |
| Size | 49 MB | 22 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Nadiia Holdina](https://appshunter.io/developer/1872492242) | [Duc Duong Tran](https://appshunter.io/developer/1580090879) |

## What reviewers say

### Quantum AI

[App page](https://appshunter.io/ios/app/quantum-ai-conquer-your-goals/id6758353749)

**Features:** macOS Compatibility

**In-app purchases:** none


### PDF Reader

[App page](https://appshunter.io/ios/app/pdf-reader-edit-and-ocr-scan/id6774545766)

**Currently charting:** #189 Top Free · Productivity (US App Store)

Easily scan, read, edit, and manage PDF documents on your iPhone and iPad. Convert images to PDF, extract text with OCR, and sign your documents. Organize files with merging, splitting, and password protection.

**Highlights:** Scan documents with camera, Convert photos to PDF, Extract text with OCR, Edit and annotate PDFs, Sign documents, Merge and split PDFs, Password protection

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Weekly | $9.99 | per 7 days |
| Premium Weekly | $14.99 | per 7 days |


## Frequently asked questions

### Is Quantum AI free?

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

### Is PDF Reader free?

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

### Do Quantum AI or PDF Reader have ads?

PDF Reader shows ads; Quantum AI does not.

### Which is updated more often, Quantum AI or PDF Reader?

Quantum AI ships an update every 4 days, and PDF Reader every 3 weeks. Most recently, Quantum AI was updated on October 28, 2026 and PDF Reader on October 29, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*