# Reading Diary vs Penguin Box

The clearest difference is review sentiment: Reading Diary at 80% against Penguin Box's 0%. Penguin Box's advantage is in-app purchases (none vs 1). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Reading Diary sells 1 one-off in-app purchase. Penguin Box asks for nothing beyond the download.

Reading Diary ships an update every 3 months, Penguin Box every 6 weeks. The most recent releases landed on October 13, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Reading Diary | Penguin Box |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/reading-diary-book-tracker/id1551851756/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | **80.0% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 6 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 61 MB | 10 MB |
| Requires iOS | 15.6 | **14.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Zdenek Skrobak](https://appshunter.io/developer/1551851758) | [Penguin Box s.r.o.](https://appshunter.io/developer/1597446825) |

## What reviewers say

### Reading Diary

[App page](https://appshunter.io/ios/app/reading-diary-book-tracker/id1551851756)

Organize your personal book collection by tracking, categorizing, and filtering your library. Add books by scanning barcodes or manually entering details. Share your reading progress and book information with friends.

**Highlights:** Track and categorize books, Scan barcodes for easy entry, Manual book detail entry, Filter and sort library, Share book information, Cross-device synchronization, Day/night theme

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $8.19 | one-time |


### Penguin Box

[App page](https://appshunter.io/ios/app/penguin-box/id1597446823)

Control and configure your smart lock using Bluetooth. Enjoy keyless access and convenient management of your smart lock directly from your mobile device.

**Highlights:** Keyless convenience, Smart lock configuration, Bluetooth access, Mobile device management

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Reading Diary free?

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

### Is Penguin Box free?

Penguin Box is free to download, with no in-app purchases.

### Do Reading Diary or Penguin Box have ads?

Neither Reading Diary nor Penguin Box shows ads.

### Which is updated more often, Reading Diary or Penguin Box?

Reading Diary ships an update every 3 months, and Penguin Box every 6 weeks. Most recently, Reading Diary was updated on October 13, 2026 and Penguin Box on October 10, 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.*