# JianYi vs QuickErrNote

The clearest difference is in-app purchases: JianYi at none against QuickErrNote's 3. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. QuickErrNote sells 3 one-off in-app purchases. JianYi asks for nothing beyond the download.

JianYi ships an update every 3 days, QuickErrNote every 5 days. The most recent releases landed on September 29, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | JianYi | QuickErrNote |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/jianyi-ai-flashcards/id6749509377/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 5 days |
| Monetization | Free | — |
| Size | 6 MB | 6 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [俊斐 胡](https://appshunter.io/developer/1830831988) | [HappyTimes Tech Co., Ltd.](https://appshunter.io/developer/1455774641) |

## What reviewers say

### JianYi

[App page](https://appshunter.io/ios/app/jianyi-ai-flashcards/id6749509377)

This tool uses AI and spaced repetition to help you memorize information. Create question-and-answer cards, organize them by tags, and follow a review schedule. An AI assistant provides explanations and optimizes your learning.

**Highlights:** AI-assisted explanations, Spaced repetition review, Tag-based organization, Learning calendar, iCloud synchronization, Mastery analysis

**Features:** Vision Pro support

**In-app purchases:** none


### QuickErrNote

[App page](https://appshunter.io/ios/app/quickerrnote-ai-error-notebook/id6801344489)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 120 Points | $0.99 | one-time |
| 400 Points | $1.99 | one-time |
| 3500 Points | $12.99 | one-time |


## Frequently asked questions

### Is JianYi free?

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

### Is QuickErrNote free?

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

### Do JianYi or QuickErrNote have ads?

Neither JianYi nor QuickErrNote shows ads.

### Which is updated more often, JianYi or QuickErrNote?

JianYi ships an update every 3 days, and QuickErrNote every 5 days. Most recently, JianYi was updated on September 29, 2026 and QuickErrNote on September 10, 2026.

---

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