# AnnoReader vs ClassLens

The clearest difference is in-app purchases: ClassLens at none against AnnoReader's 4. AnnoReader's advantage is device support (3 vs 1). On price, update cadence, ads and iOS requirement there is nothing between them.

Both are free to download. AnnoReader sells 4 in-app purchases, starting at $1.49 per month. ClassLens asks for nothing beyond the download.

AnnoReader ships an update monthly, ClassLens every 3 weeks. The most recent releases landed on June 9, 2026 and May 16, 2026 respectively.

## The numbers

| Metric | AnnoReader | ClassLens |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 69.2% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 95 MB | 3 MB |
| Requires iOS | **15.6** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Hironobu Saito](https://appshunter.io/developer/1557456154) | [Atsuhiro Hasebe](https://appshunter.io/developer/1766410126) |

## What reviewers say

### AnnoReader

[App page](https://appshunter.io/ios/app/annoreader/id1557456152)

This app visually breaks down English sentences to improve grammar understanding and reading comprehension. It offers annotation, translation, and text-to-speech features to aid learners in mastering sentence structure and fluency.

**Highlights:** Visual syntax analysis of sentences, Phrase and clause translation, Text-to-speech with accent options, AI grammar checking, OCR for text capture, Dictionary lookup and phrasal verb meanings

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Basic(monthly) | $1.49 | per month |
| Basic Plus(Monthly) | $3.49 | per month |
| Pro(Monthly) | $4.99 | per month |
| Pro Plus (Monthly) | $11.99 | per month |


### ClassLens

[App page](https://appshunter.io/ios/app/classlens/id6670457269)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is AnnoReader free?

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

### Is ClassLens free?

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

### Do AnnoReader or ClassLens have ads?

Both AnnoReader and ClassLens show ads.

### Which is updated more often, AnnoReader or ClassLens?

AnnoReader ships an update monthly, and ClassLens every 3 weeks. Most recently, AnnoReader was updated on June 9, 2026 and ClassLens on May 16, 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.*