# Curio Library vs Moth

The clearest difference is in-app purchases: Curio Library at none against Moth's 3. Curio Library also leads on rating (5.0 vs 4.6) and device support (3 vs 1). Moth's advantage is update cadence (every 6 days vs every 21 months) and ratings volume (5 vs 1). On price and ads there is nothing between them.

Both are free to download. Moth sells 3 in-app purchases, starting at $4.99 per month. Curio Library asks for nothing beyond the download.

Curio Library holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Moth has 5 ratings behind it against 1, so its average is the more settled of the two.

Curio Library ships an update every 21 months, Moth every 6 days. The most recent releases landed on November 6, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | Curio Library | Moth |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/curio-library/id1356988731/reviews)** | [4.6 (5 ratings)](https://appshunter.io/ios/app/moth-book-tracker-and-streaks/id6762601579/reviews) |
| Number of ratings | 1 | **5** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 21 months | **Every 6 days** |
| Monetization | **Free** | Freemium |
| Size | 9 MB | 103 MB |
| Requires iOS | **11.1** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [NTDE](https://appshunter.io/developer/1316864128) | [Inolab](https://appshunter.io/developer/1166999770) |

## What reviewers say

### Curio Library

[App page](https://appshunter.io/ios/app/curio-library/id1356988731)

Organize and manage your personal book collection. Keep track of all your reading materials in one place, with a simple and intuitive interface. Discover new ways to catalog your library.

**Highlights:** Personal library management, Catalog all book types, Intuitive interface, Track reading materials

**Features:** macOS Compatibility

**In-app purchases:** none


### Moth

[App page](https://appshunter.io/ios/app/moth-book-tracker-and-streaks/id6762601579)

Log your reading sessions, build daily streaks, and visualize your progress with detailed statistics. Organize your book library, set yearly goals, and enjoy a dark mode interface designed for readers.

**Highlights:** Reading timer, Streaks and daily goals, Detailed reading statistics, Book library organization, Yearly reading goal tracking, ISBN barcode scanner, Dark mode interface

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Moth Premium Monthly | $4.99 | per month |
| Moth Premium Yearly | $24.99 | per year |
| Moth Premium Yearly | $29.99 | per year |


## Frequently asked questions

### Is Curio Library free?

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

### Is Moth free?

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

### Which has better reviews, Curio Library or Moth?

Curio Library is rated higher. Curio Library averages 5.0 out of 5 from 1 ratings, while Moth averages 4.6 from 5 ratings.

### Do Curio Library or Moth have ads?

Neither Curio Library nor Moth shows ads.

### Which is updated more often, Curio Library or Moth?

Curio Library ships an update every 21 months, and Moth every 6 days. Most recently, Curio Library was updated on November 6, 2026 and Moth on November 9, 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.*