# Swivl M2 vs ReadOtter

The clearest difference is review sentiment: ReadOtter at 60% against Swivl M2's 0%. ReadOtter also leads on rating (4.7 vs 4.3) and ratings volume (41 vs 6). Swivl M2's advantage is in-app purchases (none vs 2) and iOS requirement (15.5 vs 17.2). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. ReadOtter sells 2 in-app purchases, starting at $2.99 per month. Swivl M2 asks for nothing beyond the download.

ReadOtter holds the better App Store score, 4.7 against 4.3. That said, the two scores are not equally well evidenced: ReadOtter has 41 ratings behind it against 6, so its average is the more settled of the two. Written reviews point the same way: 0% of Swivl M2's written reviews are positive against 60% of ReadOtter's.

Swivl M2 ships an update monthly, ReadOtter every 2 months. The most recent releases landed on November 4, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Swivl M2 | ReadOtter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (6 ratings)](https://appshunter.io/ios/app/swivl-m2/id6471564248/reviews) | **[4.7 (41 ratings)](https://appshunter.io/ios/app/readotter-classroom-library/id6745129261/reviews)** |
| Number of ratings | 6 | **41** |
| Positive reviews | 0.0% of reviews | **60.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Monthly** | Every 2 months |
| Monetization | **Free** | Freemium |
| Size | 92 MB | 35 MB |
| Requires iOS | **15.5** | 17.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Swivl, Inc](https://appshunter.io/developer/504240801) | [Human Theoria LLC](https://appshunter.io/developer/1810896717) |

## What reviewers say

### Swivl M2

[App page](https://appshunter.io/ios/app/swivl-m2/id6471564248)

Enhance teaching and boost student engagement using a mobile device. This tool listens to classroom activity to offer valuable support for educators.

**Highlights:** Improve instruction, Increase student participation, Mobile device support, Listens to class activity, Provides educator support

**Features:** Vision Pro support

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is Swivl M2 free?

Swivl M2 is free to download, with no in-app purchases.

### Is ReadOtter free?

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

### Which has better reviews, Swivl M2 or ReadOtter?

ReadOtter is rated higher. Swivl M2 averages 4.3 out of 5 from 6 ratings, while ReadOtter averages 4.7 from 41 ratings.

### Do Swivl M2 or ReadOtter have ads?

Neither Swivl M2 nor ReadOtter shows ads.

### Which is updated more often, Swivl M2 or ReadOtter?

Swivl M2 ships an update monthly, and ReadOtter every 2 months. Most recently, Swivl M2 was updated on November 4, 2026 and ReadOtter on October 30, 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.*