# Rayo: AI Flashcards — Your audio study playlist.

> Your audio study playlist. (iPhone/iPad app by HsuehChe Hsiao.)

- Source: https://appshunter.io/ios/app/rayo/id6756727229 (this page in markdown: same URL + `.md`)
- Developer: [HsuehChe Hsiao](https://appshunter.io/developer/1862522029)
- Category: Education, Productivity
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 68 MB
- Languages: English, Chinese, Chinese
- Released: 2026-03-15
- Data updated: 2026-05-17
- User reviews in markdown: https://appshunter.io/ios/app/rayo/id6756727229/reviews.md

## What is Rayo?

After searching for a long time, I found that there isn't a flashcard app on the market that allows me to "extract content using a web plugin" and also "listen to it as a podcast on the go." 
As an independent developer, I really dislike complicated processes, so in Rayo: no login, no card binding, and completely free to use without time limits.

【Select on Computer, Instantly Create Cards】
Forget about copy-pasting! With our exclusive free browser plugin, while watching YouTube or browsing the web, just "select key content" to directly generate well-formatted flashcards.

【Your Portable Knowledge Podcast】
Who says reviewing can only be done by staring at a screen? Rayo supports background audio playback, so you can use it while commuting or exercising with headphones, completely freeing your hands.

【Capture Easily, Minimal Experience】
Open the app and swipe left or right to review. It supports database imports, photo card creation, or directly exploring the built-in theme flashcard library.

Many exciting ideas will be added in the future, and I hope Rayo can continue to accompany you in your learning journey!

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Related Links
- Rayo Homepage: https://rayo.pse.is/8ugdr3
- Download the free desktop plugin: https://rayo.pse.is/8ughfh

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Monthly Pro | $4.99 | per month |
| Yearly Pro | $49.99 | per year |



## Version history (last 5 releases)

### 1.0.7 — 2026-04-18

[Update Announcement]
1. The old cache for language switching now uses smart switching.
2. New learning materials button will redirect to the exploration collection.

### 1.0.4 — 2026-04-01

Fix the language matching issue in the exploration collection, optimize the card mode algorithm and flight mode, allowing you to easily engage in card learning even in offline environments.

### 1.0.3 — 2026-03-25

App Update Highlights
【YouTube Bilingual Subtitle Generation】: Enjoy a multilingual viewing experience with ease, featuring a key points function to quickly grasp the essence of the videos.
【Increased Card Collection Limit】: You can now save up to 100 cards, making your collection even richer.
【Chrome Browser Sharing Feature】: New copy and share link functionality makes sharing more convenient!

### 1.0.2 — 2026-03-22

【Faster App Launch】
Optimized startup sequence with smarter data loading — the app feels snappier from the moment you open it.

【 Improved Stability】
Fixed several background thread conflicts and duplicate network calls that could cause unexpected behavior during normal use.

【Better Memory & Storage Management】
Reduced memory usage when loading study records, and added automatic cleanup of unused audio cache files to keep your storage in check.

### 1.0.1 — 2026-03-19

This update brings a smoother and safer learning experience:

【Security Upgrade】: Comprehensive enhancement of the app and browser extension security, ensuring your knowledge base and learning records are better protected.
【Playback Performance Leap】: Optimized voice engine, making playback smoother and more energy-efficient when listening as a podcast background!
【Simplified Editing Mode】: We’ve heard your feedback! We redesigned the editing process, significantly reducing the cumbersome steps when deleting cards, making data organization more intuitive and streamlined.

If you enjoy Rayo, please leave a five-star review; it’s the greatest encouragement for independent developers!

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-05-17.*