# ReadOtter vs kosleep

ReadOtter and kosleep are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. ReadOtter sells 2 in-app purchases, starting at $2.99 per month and kosleep sells 3 in-app purchases, starting at $21.99 per month. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | ReadOtter | kosleep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (41 ratings)](https://appshunter.io/ios/app/readotter-classroom-library/id6745129261/reviews)** | — |
| Number of ratings | **41** | — |
| Positive reviews | 60.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | — |
| Monetization | Freemium | — |
| Size | 35 MB | 119 MB |
| Requires iOS | 17.2 | **16.4** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Human Theoria LLC](https://appshunter.io/developer/1810896717) | [Nicole Vegenski](https://appshunter.io/developer/1874150149) |

## What reviewers say

### ReadOtter

[App page](https://appshunter.io/ios/app/readotter-classroom-library/id6745129261)

This app helps teachers manage their classroom libraries by cataloging books, tracking student checkouts, and generating reading logs. It offers a free tier with core features and a premium subscription for advanced functionalities like cloud sync and student self-checkout.

**Highlights:** Library cataloging, Student checkout tracking, Digital reading logs, Book categorization, iCloud sync and backup, Student self-checkout kiosk

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ReadOtter Premium | $2.99 | per month |
| ReadOtter Premium | $19.99 | per year |


### kosleep

[App page](https://appshunter.io/ios/app/kosleep/id6758730803)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Moonbeam | $21.99 | per month |
| Starlight | $39.99 | per month |
| Always Home | $349.00 | per year |


## Frequently asked questions

### Is ReadOtter free?

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

### Is kosleep free?

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

### Do ReadOtter or kosleep have ads?

Neither ReadOtter nor kosleep shows ads.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*