# 益深仪器 vs 重要日期备忘

The clearest difference is update cadence: 重要日期备忘 at every 2 days against 益深仪器's every 2 months. 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.

益深仪器 ships an update every 2 months, 重要日期备忘 every 2 days. The most recent releases landed on September 14, 2026 and September 6, 2026 respectively.

## The numbers

| Metric | 益深仪器 | 重要日期备忘 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 days** |
| Size | 30 MB | 28 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [深圳益深环保科技有限公司](https://appshunter.io/developer/1674460698) | [广州一加安科技有限公司](https://appshunter.io/developer/1504028880) |

## What reviewers say

### 益深仪器

[App page](https://appshunter.io/ios/app/id6445880757)

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

**In-app purchases:** none


### 重要日期备忘

[App page](https://appshunter.io/ios/app/id6758986177)

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

**In-app purchases:** none


## Frequently asked questions

### Is 益深仪器 free?

益深仪器 is free to download, with no in-app purchases.

### Is 重要日期备忘 free?

重要日期备忘 is free to download, with no in-app purchases.

### Do 益深仪器 or 重要日期备忘 have ads?

Neither 益深仪器 nor 重要日期备忘 shows ads.

### Which is updated more often, 益深仪器 or 重要日期备忘?

益深仪器 ships an update every 2 months, and 重要日期备忘 every 2 days. Most recently, 益深仪器 was updated on September 14, 2026 and 重要日期备忘 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.*