# ۵۰۴ لغت ضروری vs Rah Book Reader

The clearest difference is price: Rah Book Reader at Free against ۵۰۴ لغت ضروری's $2.99. Rah Book Reader also leads on ratings volume (9.1K vs 3) and chart position (#160 vs unranked). ۵۰۴ لغت ضروری's advantage is rating (5.0 vs 4.7) and update cadence (every 2 months vs every 5 months). On review sentiment, ads, in-app purchases and device support there is nothing between them.

Rah Book Reader is free to download; ۵۰۴ لغت ضروری costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

۵۰۴ لغت ضروری holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Rah Book Reader has 9.1K ratings behind it against 3, so its average is the more settled of the two. Written reviews split almost evenly too, at 71% and 72% positive.

۵۰۴ لغت ضروری ships an update every 2 months, Rah Book Reader every 5 months. The most recent releases landed on October 11, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | ۵۰۴ لغت ضروری | Rah Book Reader |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/id866574087/reviews)** | [4.7 (9.1K ratings)](https://appshunter.io/ios/app/rah-book-reader/id1460837083/reviews) |
| Number of ratings | 3 | **9.1K** |
| Positive reviews | 71.4% of reviews | **72.1% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 5 months |
| Monetization | Paid | **Free** |
| Best chart rank | — | **#160** |
| Size | 37 MB | 19 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Golden Mind Services LTD](https://appshunter.io/developer/417614614) | [Majid Sharifi](https://appshunter.io/developer/1150885699) |

## What reviewers say

### ۵۰۴ لغت ضروری

[App page](https://appshunter.io/ios/app/id866574087)

Master 504 essential English words with this app, featuring explanations, Persian meanings, and audio pronunciations. Utilize the Leitner system for effective learning and track your progress with charts. Save your favorite words for quick review.

**Highlights:** 504 essential words, English explanations and Persian meanings, Audio pronunciation, Leitner learning system, Progress tracking charts, Favorite words list

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

**In-app purchases:** none


### Rah Book Reader

[App page](https://appshunter.io/ios/app/rah-book-reader/id1460837083)

**Currently charting:** #160 Top Free · Book (US App Store)

This application allows users to download and read PDF documents and audiobooks. It offers a simple and free experience for accessing digital content on mobile devices.

**Highlights:** Download PDF documents, Read audiobooks, Simple interface, Free to use, iPhone and iPad compatible

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

**In-app purchases:** none

**What reviewers like**

- 📚 Excellent selection of books
- 🎧 Great audiobook experience
- 💰 Affordable pricing
- 👍 User-friendly interface
- 🌟 Highly rated by users

**What reviewers complain about**

- 🐛 Occasional crashes or bugs
- ⏱️ Slow loading times for some users
- 🔒 Lack of account management features
- 📚 Limited book selection in some genres

**Reported bugs**

- App crashes after recent update
- Books disappear from user library
- Playback issues with audiobooks

**Requested features**

- Add support for ePub format
- Implement highlighting and note-taking features
- Improve syncing across devices
- Optimize for tablet and landscape mode


## Frequently asked questions

### Is ۵۰۴ لغت ضروری free?

۵۰۴ لغت ضروری costs $2.99, with no in-app purchases.

### Is Rah Book Reader free?

Rah Book Reader is free to download, with no in-app purchases.

### Which has better reviews, ۵۰۴ لغت ضروری or Rah Book Reader?

۵۰۴ لغت ضروری is rated higher. ۵۰۴ لغت ضروری averages 5.0 out of 5 from 3 ratings, while Rah Book Reader averages 4.7 from 9.1K ratings.

### Do ۵۰۴ لغت ضروری or Rah Book Reader have ads?

Neither ۵۰۴ لغت ضروری nor Rah Book Reader shows ads.

### Which is updated more often, ۵۰۴ لغت ضروری or Rah Book Reader?

۵۰۴ لغت ضروری ships an update every 2 months, and Rah Book Reader every 5 months. Most recently, ۵۰۴ لغت ضروری was updated on October 11, 2026 and Rah Book Reader on October 18, 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.*