# Cerulean - 小工具合集

> Minimalist collection of diverse utility tools for everyday tasks. (iPhone/iPad app by 丹 张.)

- Source: https://appshunter.io/ios/app/cerulean/id1381352370 (this page in markdown: same URL + `.md`)
- Developer: [丹 张](https://appshunter.io/developer/1381352369)
- Category: Utilities, Productivity
- Price: Free
- Rating: 4.76/5 from 390 App Store ratings · 53 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.0 · 49 MB
- Languages: Chinese
- Released: 2018-06-04
- Data updated: 2026-08-31
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/cerulean/id1381352370/reviews.md

## What is Cerulean?

多种小功能整理，极致简约。

如在使用中遇见任何问题或有新的创意，欢迎发送邮件反馈至我的邮箱cerulean_log@163.com，我会尽快处理哒。~~~

## Key features

- Multiple utility tools
- Minimalist design
- Simple to use
- User feedback welcome

## What do users think of Cerulean?

Overall sentiment: positive

**Pros**

- 👍 Very interesting and useful
- 👍 Great and free to use
- 👍 No ads, clean interface
- 👍 Very comprehensive toolset
- 👍 Good and simple
- 👍 Very practical and liked
- 👍 Powerful and versatile
- 👍 Clean and functional
- 👍 Excellent free toolkits
- 👍 Very useful, like shortcuts
- 👍 Great value, no in-app purchases
- 👍 Lots of features, very powerful
- 👍 User-friendly interface, comfortable color scheme
- 👍 Good and useful
- 👍 Excellent app, good job by the developer
- 👍 Very good and free
- 👍 Useful and free
- 👍 "Swiss Army knife" app, very practical
- 👍 Very good tool
- 👍 Clean and enjoyable to use

**Cons**

- ❓ Limitation unclear, is it free?
- ❓ App is entirely in Chinese, no English option
- ❓ Ruler function has issues on iOS 17
- ❓ Volume is too low for sound-related features
- ❓ Search functionality is poor
- 🐛 Calculator button missing on iPad Pro
- 🐛 Ruler is inaccurate on 12 mini
- 🐛 Widget background is white, hard to see text
- 🐛 Text to speech and keyboard issues on iPhone X
- 🐛 Image stitching (chat history) missing on iPhone 12
- 🐛 Widget support removed for iOS 13
- 🐛 Low volume for metronome and call simulation
- 🐛 Ads are low quality

**Commonly reported bugs**

- Ruler function has issues on iOS 17
- Volume is too low for sound-related features (metronome, call simulation)
- Search functionality is poor
- Calculator button missing on iPad Pro
- Ruler is inaccurate on 12 mini
- Widget background is white, hard to see text
- Text to speech and keyboard issues on iPhone X
- Image stitching (chat history) missing on iPhone 12
- Widget support removed for iOS 13

**Most requested features**

- Add more small features
- Add currency conversion function
- Add data and Chinese uppercase number conversion
- Consider adding various unit conversion functions

## Recent user reviews (10 of 53)

All indexed reviews: https://appshunter.io/ios/app/cerulean/id1381352370/reviews.md

### 5/5 — 朴实无华

*2026-02-05, version 6.9.2*

非常有意思！

### 5/5 — 不錯用

*2025-10-20, version 6.9.1*

讚👍🏼

### 5/5 — 方便免費，希望能有更多小功能

*2025-10-19, version 6.9.1*

真棒

### 5/5 — 好用！

*2025-08-26, version 6.9.0*

太厉害了，什么都有，而且很干净

### 5/5 — good

*2025-02-17, version 6.9.0*

very useful, like shortcuts.

### 5/5 — the best free toolkits

*2025-01-18, version 6.8.2*

everthing you need

### 5/5 — Great

*2024-12-16, version 6.8.2*

very good and free to use. No ads.

### 5/5 — 实用，免费

*2024-11-17, version 6.8.1*

无广告🤙

### 3/5 — 评价

*2024-07-31, version 6.7.4*

都还好，就是这个上限是什么意思，不是免费的吗

### 5/5 — 良心、好用

*2024-05-17, version 6.7.4*

没有任何内购和广告，功能也非常全，是我用过最好用的此类工具

## Frequently asked questions about Cerulean

### What does this app do?

This app is a collection of various small utility tools designed with a minimalist aesthetic. It aims to provide simple and efficient functions for everyday use without unnecessary complexity.

### What are the key features?

The app offers a variety of utility tools, all presented in a minimalist and user-friendly interface. The focus is on simplicity and ease of access to these functions.

### Is this app free to use?

Yes, the application is available for free. There are no advertisements or in-app purchases mentioned, suggesting a completely free experience for users.

### How can I provide feedback or suggest new features?

Users can send feedback or new ideas via email to cerulean_log@163.com. The developer is responsive and aims to address user input promptly.

## Version history (last 5 releases)

### 6.9.3 — 2026-06-20

【欲寄彩笺兼尺素，山长水阔知何处】
- 优化已知问题

### 6.9.2 — 2025-11-10

【惊起归鸿不成字，辞柯落叶最知秋】
新增：
- 清空剪贴板
其他：
- 暂时回退到旧版界面样式

### 6.9.1 — 2025-10-13

【一年好景君须记，正是橙黄橘绿时】

- 直尺适配iPhone 17系列

### 6.9.0 — 2025-02-16

【春风倚棹阖闾城，水国春寒阴复晴】
新增：
- 农历查询
- 黄金实时价格
- 号码归属地
优化：
- 修复已知问题

### 6.8.2 — 2024-12-09

【黄云万里动风色，白波九道流雪山】
- 因API服务到期，下线部分网络功能，后续将专注于离线功能的开发与优化，感谢大家的支持与理解~

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## Related topics

[cerulearn](https://appshunter.io/ios/topics/cerulearn)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-31.*