# TeraScan vs PDF Reader

The clearest difference is ratings volume: TeraScan at 62 against PDF Reader's 4. PDF Reader's advantage is monetization model (ad-supported vs freemium) and update cadence (every 4 days vs every 10 days). On price, rating, review sentiment and ads there is nothing between them.

Both are free to download. TeraScan sells 22 in-app purchases, starting at $3.99 per 7 days and PDF Reader sells 1 in-app purchase, starting at $19.99 per 7 days. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.0 for TeraScan against 4.0 for PDF Reader. That said, the two scores are not equally well evidenced: TeraScan has 62 ratings behind it against 4, so its average is the more settled of the two. Written reviews split almost evenly too, at 51% and 50% positive.

TeraScan ships an update every 10 days, PDF Reader every 4 days. The most recent releases landed on September 21, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | TeraScan | PDF Reader |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (62 ratings)](https://appshunter.io/ios/app/terascan-ai-pdf-scanner/id6473889046/reviews) | [4.0 (4 ratings)](https://appshunter.io/ios/app/pdf-reader-smart-reader/id6756703231/reviews) |
| Number of ratings | **62** | 4 |
| Positive reviews | **51.0% of reviews** | 50.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 10 days | **Every 4 days** |
| Monetization | Freemium | **Ad-supported** |
| Size | 184 MB | 85 MB |
| Requires iOS | **15.0** | 16.4 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [FLEXTECH INC.](https://appshunter.io/developer/1552156015) | [truong nguyen xuan](https://appshunter.io/developer/552933291) |

## What reviewers say

### TeraScan

[App page](https://appshunter.io/ios/app/terascan-ai-pdf-scanner/id6473889046)

This app provides a comprehensive solution for digitizing, editing, and managing documents. It allows users to scan, convert files to PDF or JPG, extract text with OCR in multiple languages, and enhance scans with AI. Users can also edit, sign, secure, and sync documents across devices.

**Highlights:** High-quality document scanning, OCR text extraction in 41 languages, AI-enhanced scan quality, Document editing and signing, Cross-device file syncing, Password protection and watermarking

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

**In-app purchases (22)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $3.99 | per 7 days |
| TeraScan Premium(Weeky） | $3.99 | per 7 days |
| Premium | $3.99 | per 7 days |
| 1 week Premium 1024GB storage | $4.99 | per 7 days |
| 1 Month Premium 1024GB storage | $6.99 | per month |
| Premium | $6.99 | per month |
| Premium(1 Month） | $6.99 | per month |
| TeraScan Premium(Monthly） | $6.99 | per month |
| Premium | $8.99 | per month |
| Premium(1 Year) | $17.99 | per year |
| Premium (Yearly) | $17.99 | per year |
| TeraScan Premium(Yearly） | $17.99 | per year |
| TeraScan Premium(Yearly） | $17.99 | per year |
| PDF Scanner Premium（Yearly） | $24.99 | per year |
| PDF Scanner Premium（Yearly） | $24.99 | per year |
| 1 Year Premium 1024GB storage | $29.99 | per year |
| 1 Year Premium 1024GB storage | $29.99 | per year |
| Premium For One Month | $7.99 | one-time |
| Premium | $17.99 | one-time |
| Premium For One Year | $17.99 | one-time |
| PDF Scanner Premium | $24.99 | one-time |
| PDF Scanner Premium | $29.99 | one-time |

**What reviewers like**

- 👍 Nice app
- 👍 Excellent service
- 👍 Good app
- 👍 Great app
- 👍 Very useful

**What reviewers complain about**

- 😞 Cheating app
- 😞 Worst app
- 😞 Scammy
- 😞 Waste of time and money
- 😞 Not free

**Reported bugs**

- Arabic text appears reversed and uneditable
- Cannot finalize anything with free account
- Premium account not activated after payment
- Subscription not working
- Cannot convert scanned documents to PDF

**Requested features**

- Add more file formats like .zip
- Add Thai language option for translation


### PDF Reader

[App page](https://appshunter.io/ios/app/pdf-reader-smart-reader/id6756703231)

This app is a fast and lightweight document viewer for PDF, Word, Excel, and PowerPoint files. It offers smart file management, offline access, and easy sharing, making it ideal for students and professionals. Enjoy a seamless reading experience with features like search, bookmarks, and dark mode.

**Highlights:** All-in-one document viewer (PDF, DOCX, XLSX, PPTX, TXT), Smart file manager, Offline document access, Fast and smooth performance, Search and bookmarking, Dark mode support, Easy document sharing

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Subscription - 1 week | $19.99 | per 7 days |


## Frequently asked questions

### Is TeraScan free?

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

### Is PDF Reader free?

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

### Which has better reviews, TeraScan or PDF Reader?

TeraScan and PDF Reader are both rated 4.0 out of 5 on the App Store, from 62 and 4 ratings respectively.

### Do TeraScan or PDF Reader have ads?

Both TeraScan and PDF Reader show ads.

### Which is updated more often, TeraScan or PDF Reader?

TeraScan ships an update every 10 days, and PDF Reader every 4 days. Most recently, TeraScan was updated on September 21, 2026 and PDF Reader on September 23, 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.*