# 知微宇宙 AstroPearl vs MarkMemo

The clearest difference is update cadence: MarkMemo at every 11 days against 知微宇宙 AstroPearl's every 5 weeks. 知微宇宙 AstroPearl's advantage is iOS requirement (15.1 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

知微宇宙 AstroPearl ships an update every 5 weeks, MarkMemo every 11 days. Both last shipped on October 16, 2026.

## The numbers

| Metric | 知微宇宙 AstroPearl | MarkMemo |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 11 days** |
| Size | 614 MB | 27 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen Sanwu Yaofa Technology Limited.](https://appshunter.io/developer/1818322110) | [舟 徐](https://appshunter.io/developer/1642105940) |

## What reviewers say

### 知微宇宙 AstroPearl

[App page](https://appshunter.io/ios/app/astropearl/id6746753340)

**In-app purchases:** none


### MarkMemo

[App page](https://appshunter.io/ios/app/markmemo/id6757456958)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 知微宇宙 AstroPearl free?

知微宇宙 AstroPearl is free to download, with no in-app purchases.

### Is MarkMemo free?

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

### Do 知微宇宙 AstroPearl or MarkMemo have ads?

Neither 知微宇宙 AstroPearl nor MarkMemo shows ads.

### Which is updated more often, 知微宇宙 AstroPearl or MarkMemo?

知微宇宙 AstroPearl ships an update every 5 weeks, and MarkMemo every 11 days. Most recently, 知微宇宙 AstroPearl was updated on October 16, 2026 and MarkMemo on October 16, 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.*