# SentenceDeck vs Qingdu AI

The clearest difference is update cadence: Qingdu AI at every 10 days against SentenceDeck's every 6 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. SentenceDeck sells 3 one-off in-app purchases and Qingdu AI sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

SentenceDeck ships an update every 6 weeks, Qingdu AI every 10 days. Both last shipped on October 31, 2026.

## The numbers

| Metric | SentenceDeck | Qingdu AI |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 10 days** |
| Monetization | — | Freemium |
| Size | 36 MB | 53 MB |
| Requires iOS | **17.0** | 18.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [奇濂 任](https://appshunter.io/developer/1843376248) | [Jungsoo Nam](https://appshunter.io/developer/6782075910) |

## What reviewers say

### SentenceDeck

[App page](https://appshunter.io/ios/app/sentencedeck-shadowing/id6759489049)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Credits 100 | $0.99 | one-time |
| Credits 500 | $3.99 | one-time |
| Credits 1200 | $7.99 | one-time |


### Qingdu AI

[App page](https://appshunter.io/ios/app/qingdu-ai-chinese-reader/id6782075908)

This app uses your camera to instantly recognize, read aloud, and translate Chinese characters from any source. It's designed for learners to improve their reading comprehension and pronunciation with AI-powered OCR and natural text-to-speech.

**Highlights:** AI-powered OCR for accurate text recognition, Natural native pronunciation for spoken text, Instant translation of recognized characters, Selective scanning with adjustable crop area, Flexible playback with speed control, Word highlighting for easy following

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium | $4.99 | per month |
| Yearly Premium | $34.99 | per year |


## Frequently asked questions

### Is SentenceDeck free?

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

### Is Qingdu AI free?

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

### Do SentenceDeck or Qingdu AI have ads?

Neither SentenceDeck nor Qingdu AI shows ads.

### Which is updated more often, SentenceDeck or Qingdu AI?

SentenceDeck ships an update every 6 weeks, and Qingdu AI every 10 days. Most recently, SentenceDeck was updated on October 31, 2026 and Qingdu AI on October 31, 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.*