# Reader AI vs Opa! Bilingual Book Reader

The clearest difference is ads: Opa! Bilingual Book Reader at none against Reader AI's shown. On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Reader AI sells 7 in-app purchases, starting at $6.99 per month and Opa! Bilingual Book Reader sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly every 5 days. Both last shipped on November 6, 2026.

## The numbers

| Metric | Reader AI | Opa! Bilingual Book Reader |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.0 (1 ratings)](https://appshunter.io/ios/app/reader-ai-read-and-learn/id6806736317/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 5 days | Every 5 days |
| Monetization | Free with in-app purchases | — |
| Size | 85 MB | 3 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [江 刘](https://appshunter.io/developer/1672554088) | [Momentarium LLC](https://appshunter.io/developer/1671025250) |

## What reviewers say

### Reader AI

[App page](https://appshunter.io/ios/app/reader-ai-read-and-learn/id6806736317)

Enhance your reading and language learning experience by importing books and articles. Get AI-powered explanations, translations, and summaries. Listen to narrated text and organize your library with customizable features.

**Highlights:** AI-powered word and sentence explanations, In-context translation, Text-to-speech narration, Import EPUB, TXT, MOBI, AZW3, PDF, Website and blog following, Customizable reading layout, PDF annotation

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $6.99 | per month |
| Quarterly | $19.99 | per 3 months |
| Yearly | $69.99 | per year |
| 100 points | $9.99 | one-time |
| No bookshelf limit | $9.99 | one-time |
| 300 points | $29.99 | one-time |
| 1000 points | $89.99 | one-time |


### Opa! Bilingual Book Reader

[App page](https://appshunter.io/ios/app/opa-bilingual-book-reader/id6817152105)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Month | $4.99 | per month |
| Year | $14.99 | per year |


## Frequently asked questions

### Is Reader AI free?

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

### Is Opa! Bilingual Book Reader free?

Opa! Bilingual Book Reader is free to download, with in-app purchases available.

### Do Reader AI or Opa! Bilingual Book Reader have ads?

Reader AI shows ads; Opa! Bilingual Book Reader does not.

### Which is updated more often, Reader AI or Opa! Bilingual Book Reader?

Reader AI ships an update every 5 days, and Opa! Bilingual Book Reader every 5 days. Most recently, Reader AI was updated on November 6, 2026 and Opa! Bilingual Book Reader on November 6, 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.*