# 橡皮错题 vs Memo Clock

The clearest difference is price: 橡皮错题 at Free against Memo Clock's $6.99. 橡皮错题 also leads on update cadence (every 10 days vs monthly). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

橡皮错题 is free to download; Memo Clock costs $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.

橡皮错题 ships an update every 10 days, Memo Clock monthly. The most recent releases landed on November 8, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | 橡皮错题 | Memo Clock |
| --- | --- | --- |
| Price | **Free** | $6.99 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 10 days** | Monthly |
| Monetization | — | Paid |
| Size | 3 MB | 32 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [仕琦 牛](https://appshunter.io/developer/1825984616) | [原赫 张](https://appshunter.io/developer/6780920126) |

## What reviewers say

### 橡皮错题

[App page](https://appshunter.io/ios/app/id6748517813)

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

**In-app purchases:** none


### Memo Clock

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

This app helps you remember information through notes, flashcards, and focus timers. It allows you to create digital cards from handwritten notes, files, or photos, and track your learning progress and focus time on a customizable home page.

**Highlights:** Handwritten notes and typing, File import (PDF, Word, Web), Flashcard creation and spaced repetition, Pomodoro and focus timers, Customizable home page widgets, Progress and focus time tracking, Built-in word books

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

**In-app purchases:** none


## Frequently asked questions

### Is 橡皮错题 free?

橡皮错题 is free to download, with no in-app purchases.

### Is Memo Clock free?

Memo Clock costs $6.99, with no in-app purchases.

### Do 橡皮错题 or Memo Clock have ads?

Neither 橡皮错题 nor Memo Clock shows ads.

### Which is updated more often, 橡皮错题 or Memo Clock?

橡皮错题 ships an update every 10 days, and Memo Clock monthly. Most recently, 橡皮错题 was updated on November 8, 2026 and Memo Clock on November 5, 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.*