# ezPDF Reader vs Smart Calculator Pro

The clearest difference is rating: Smart Calculator Pro at 5.0 against ezPDF Reader's 1.3. Smart Calculator Pro also leads on in-app purchases (none vs 4). ezPDF Reader's advantage is price ($1.99 vs $7.99) and ratings volume (29 vs 1). On ads and device support there is nothing between them.

ezPDF Reader costs $1.99 and Smart Calculator Pro $7.99 up front. ezPDF Reader sells 4 one-off in-app purchases. Smart Calculator Pro asks for nothing beyond the download.

Smart Calculator Pro holds the better App Store score, 5.0 against 1.3. That said, the two scores are not equally well evidenced: ezPDF Reader has 29 ratings behind it against 1, so its average is the more settled of the two.

ezPDF Reader ships an update every 2 weeks, Smart Calculator Pro every 2 months. The most recent releases landed on October 17, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | ezPDF Reader | Smart Calculator Pro |
| --- | --- | --- |
| Price | **$1.99** | $7.99 |
| Rating | [1.3 (29 ratings)](https://appshunter.io/ios/app/ezpdf-reader-pdf-reader-annotator-and-form-filler/id396101792/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/smart-calculator-pro/id6469614398/reviews)** |
| Number of ratings | **29** | 1 |
| Positive reviews | 20.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 2 months |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 534 MB | 14 MB |
| Requires iOS | **8.0** | 14.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Unidocs Inc.](https://appshunter.io/developer/396101795) | [晖明 甘](https://appshunter.io/developer/1684180474) |

## What reviewers say

### ezPDF Reader

[App page](https://appshunter.io/ios/app/ezpdf-reader-pdf-reader-annotator-and-form-filler/id396101792)

This app allows users to view and interact with PDF documents, including multimedia playback and form filling. It offers robust annotation tools compatible with Adobe Acrobat and supports text reflow for comfortable reading on mobile devices.

**Highlights:** Multimedia PDF playback (audio & video), Interactive PDF form filling, Comprehensive annotation tools, Text reflow and customizable viewing, Text-to-Speech (TTS) functionality, Password-protected PDF support

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| TTS Korean HCILAB: Yujin | $2.99 | one-time |
| TTS Japanese HCILAB: Naomi | $2.99 | one-time |
| TTS English HCILAB: Sarah | $2.99 | one-time |
| TTS Chinese HCILAB: Xiaoling | $2.99 | one-time |

**What reviewers like**

- 👍 Good for language learning materials (plays embedded audio)
- 👍 Reflow feature is good for text viewing
- 👍 Fast loading of large PDF files (mentioned by some)
- 👍 Supports Dropbox and Wi-Fi file transfer

**What reviewers complain about**

- 🐛 Crashes frequently
- 🐛 Not working as advertised
- 🐛 Useless for many users
- 🐛 Incompatible with iPad/iPhone
- 🐛 Difficult to use/understand

**Reported bugs**

- App crashes on launch
- App crashes when rotating to landscape mode
- TTS feature not working after purchase
- Cannot download purchased features
- Files disappear or are not saved

**Requested features**

- Update for iOS 10 compatibility
- Improve UI/UX
- Add WebDAV/FTP synchronization
- Fix landscape mode crashes
- Add floating audio player


### Smart Calculator Pro

[App page](https://appshunter.io/ios/app/smart-calculator-pro/id6469614398)

This all-in-one calculator offers basic, scientific, and fraction calculations, along with unit conversion and financial tools. It features an editable input, a widget, and a keyboard extension for convenient use on iPhones and iPads. Track health metrics and convert numbers to words with this comprehensive utility.

**Highlights:** Basic and scientific calculations, Fraction and editable input, Unit and currency converter, BMI, date, and loan calculators, Number to words conversion, Hexadecimal converter, Calculator widget and keyboard

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ezPDF Reader free?

ezPDF Reader costs $1.99, and also offers in-app purchases.

### Is Smart Calculator Pro free?

Smart Calculator Pro costs $7.99, with no in-app purchases.

### Which has better reviews, ezPDF Reader or Smart Calculator Pro?

Smart Calculator Pro is rated higher. ezPDF Reader averages 1.3 out of 5 from 29 ratings, while Smart Calculator Pro averages 5.0 from 1 ratings.

### Do ezPDF Reader or Smart Calculator Pro have ads?

Neither ezPDF Reader nor Smart Calculator Pro shows ads.

### Which is updated more often, ezPDF Reader or Smart Calculator Pro?

ezPDF Reader ships an update every 2 weeks, and Smart Calculator Pro every 2 months. Most recently, ezPDF Reader was updated on October 17, 2026 and Smart Calculator Pro on October 4, 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.*