# AnnoReader vs Curios

The clearest difference is device support: AnnoReader at 3 against Curios's 1. AnnoReader also leads on iOS requirement (15.6 vs 17.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. AnnoReader sells 4 in-app purchases, starting at $1.49 per month and Curios sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

AnnoReader ships an update monthly, Curios every 2 months. The most recent releases landed on October 7, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | AnnoReader | Curios |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 69.2% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | **Monthly** | Every 2 months |
| Monetization | Free with in-app purchases | — |
| Size | 95 MB | 8 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [Hironobu Saito](https://appshunter.io/developer/1557456154) | [Shunsuke Asai](https://appshunter.io/developer/1826470278) |

## 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 |


### Curios

[App page](https://appshunter.io/ios/app/curios/id6755347548)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 買い切りPremium | $5.99 | one-time |


## Frequently asked questions

### Is AnnoReader free?

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

### Is Curios free?

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

### Do AnnoReader or Curios have ads?

Both AnnoReader and Curios show ads.

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

AnnoReader ships an update monthly, and Curios every 2 months. Most recently, AnnoReader was updated on October 7, 2026 and Curios on October 30, 2026.

---

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