# 写字无忧 vs 信锐锐灵

The clearest difference is ads: 写字无忧 at none against 信锐锐灵's shown. 写字无忧 also leads on update cadence (monthly vs every 4 months) and iOS requirement (9.0 vs 12.0). On price, 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.

写字无忧 ships an update monthly, 信锐锐灵 every 4 months. The most recent releases landed on May 16, 2026 and September 6, 2026 respectively.

## The numbers

| Metric | 写字无忧 | 信锐锐灵 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Monthly** | Every 4 months |
| Size | 180 MB | 53 MB |
| Requires iOS | **9.0** | 12.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [瑞 许](https://appshunter.io/developer/1587478872) | [Shenzhen Sundray Technologies Co.,Ltd.](https://appshunter.io/developer/1120655348) |

## What reviewers say

### 写字无忧

[App page](https://appshunter.io/ios/app/id1589722374)

**Features:** macOS Compatibility

**In-app purchases:** none


### 信锐锐灵

[App page](https://appshunter.io/ios/app/id6443997698)

**In-app purchases:** none


## Frequently asked questions

### Is 写字无忧 free?

写字无忧 is free to download, with no in-app purchases.

### Is 信锐锐灵 free?

信锐锐灵 is free to download, with no in-app purchases.

### Do 写字无忧 or 信锐锐灵 have ads?

信锐锐灵 shows ads; 写字无忧 does not.

### Which is updated more often, 写字无忧 or 信锐锐灵?

写字无忧 ships an update monthly, and 信锐锐灵 every 4 months. Most recently, 写字无忧 was updated on May 16, 2026 and 信锐锐灵 on September 6, 2026.

---

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