# shelfio vs Reading Memory

The clearest difference is in-app purchases: shelfio at none against Reading Memory's 2. shelfio also leads on update cadence (fortnightly vs every 2 months) and iOS requirement (18.0 vs 26.0). On price, ads and device support there is nothing between them.

Both are free to download. Reading Memory sells 2 in-app purchases, starting at $3.99 per month. shelfio asks for nothing beyond the download.

shelfio ships an update fortnightly, Reading Memory every 2 months. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | shelfio | Reading Memory |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 2 months |
| Monetization | — | Freemium |
| Size | 64 MB | 48 MB |
| Requires iOS | **18.0** | 26.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Reo Shigeno](https://appshunter.io/developer/1788864693) | [Kyoichi Taniguchi](https://appshunter.io/developer/1609440791) |

## What reviewers say

### shelfio

[App page](https://appshunter.io/ios/app/shelfio/id1577889639)

**Features:** macOS Compatibility

**In-app purchases:** none


### Reading Memory

[App page](https://appshunter.io/ios/app/reading-memory-book-tracker/id6751159926)

This app helps you build a consistent reading habit and retain information from the books you read. It allows you to track reading days, manage your to-read pile, and take private notes on your books. Advanced features like AI-powered key point extraction are available through an optional subscription.

**Highlights:** Build daily reading habits, Track reading streaks and finished books, Organize to-read and finished book piles, Take private notes and sticky notes, Search and add books via barcode or title, Generate reading cards and badges, AI-powered key point extraction (subscription)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| メモリープラス月額プラン | $3.99 | per month |
| メモリープラス年額プラン | $39.99 | per year |


## Frequently asked questions

### Is shelfio free?

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

### Is Reading Memory free?

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

### Do shelfio or Reading Memory have ads?

Neither shelfio nor Reading Memory shows ads.

### Which is updated more often, shelfio or Reading Memory?

shelfio ships an update fortnightly, and Reading Memory every 2 months. Most recently, shelfio was updated on November 3, 2026 and Reading Memory on November 5, 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.*