# 知格闪卡 vs Memo Clock

The clearest difference is in-app purchases: Memo Clock at none against 知格闪卡's 1. 知格闪卡's advantage is update cadence (every 4 days vs monthly) and iOS requirement (15.1 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. 知格闪卡 sells 1 one-off in-app purchase. Memo Clock asks for nothing beyond the download.

知格闪卡 ships an update every 4 days, Memo Clock monthly. The most recent releases landed on September 19, 2026 and September 6, 2026 respectively.

## The numbers

| Metric | 知格闪卡 | Memo Clock |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 4 days** | Monthly |
| Monetization | — | Free |
| Size | 39 MB | 13 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [良玉 侯](https://appshunter.io/developer/1879665668) | [原赫 张](https://appshunter.io/developer/6780920126) |

## What reviewers say

### 知格闪卡

[App page](https://appshunter.io/ios/app/id6766411237)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 永久会员 | $12.99 | one-time |


### Memo Clock

[App page](https://appshunter.io/ios/app/memo-clock/id6780967507)

Capture and review important information efficiently with this minimalist note-taking app. Save text, handwriting, or images as memos and schedule timely reminders for review. Ideal for students preparing for exams by consolidating key points and mistakes.

**Highlights:** Capture text, handwriting, or image memos, Schedule review frequencies and reminders, Ideal for exam preparation, Simple and lightweight interface, Syncs via iCloud

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

**In-app purchases:** none


## Frequently asked questions

### Is 知格闪卡 free?

知格闪卡 is free to download, with in-app purchases available.

### Is Memo Clock free?

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

### Do 知格闪卡 or Memo Clock have ads?

Neither 知格闪卡 nor Memo Clock shows ads.

### Which is updated more often, 知格闪卡 or Memo Clock?

知格闪卡 ships an update every 4 days, and Memo Clock monthly. Most recently, 知格闪卡 was updated on September 19, 2026 and Memo Clock on September 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.*