# Days Matter Air vs 建设工程安全问题 AI识别系统

The clearest difference is in-app purchases: 建设工程安全问题 AI识别系统 at none against Days Matter Air's 4. Days Matter Air's advantage is ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Days Matter Air sells 4 one-off in-app purchases. 建设工程安全问题 AI识别系统 asks for nothing beyond the download.

## The numbers

| Metric | Days Matter Air | 建设工程安全问题 AI识别系统 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (338 ratings)](https://appshunter.io/ios/app/days-matter-air-countdown/id1113365292/reviews)** | — |
| Number of ratings | **338** | — |
| Positive reviews | 84.8% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | — |
| Monetization | Free with in-app purchases | — |
| Size | 161 MB | 84 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | **iPhone, iPod, Apple Watch** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [iDaily Corp.](https://appshunter.io/developer/364264742) | [广州筑保科技有限公司](https://appshunter.io/developer/1814314724) |

## What reviewers say

### Days Matter Air

[App page](https://appshunter.io/ios/app/days-matter-air-countdown/id1113365292)

Track important upcoming and past events with a visual countdown. Supports a vast date range, custom categories, and widgets. Never miss a birthday, anniversary, or bill payment again.

**Highlights:** Countdown/count up to 10,000 years, Support for various widgets, Customizable event categories, Lunar calendar support, Pin important dates to the top, Passcode protection

**Features:** macOS Compatibility, Apple Watch app, iMessage stickers, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Days Matter Air Pro | $1.99 | one-time |
| 咖啡 | $2.99 | one-time |
| 银币 | $5.99 | one-time |
| 金币 | $14.99 | one-time |

**What reviewers like**

- 💻 Convenient and easy to use
- 🎨 Beautiful and intuitive interface
- ⏱️ Helpful countdown and reminders
- 🗓️ Customizable event backgrounds
- 📆 Tracks important dates well

**What reviewers complain about**

- 🌐 Some Chinese language elements
- 🔔 Inconsistent notification behavior
- 🔍 Lack of search functionality
- ⌚ Limited Apple Watch integration
- 🔒 Sync issues with iCloud/Apple Watch

**Reported bugs**

- Occasional app crashes
- Widget disappearing from Notification Center
- Incompatibility with newer iOS versions

**Requested features**

- Add note/description field for events
- Provide more language options
- Improve Apple Watch app functionality
- Implement backup and restore options
- Add sorting/filtering for event lists


### 建设工程安全问题 AI识别系统

[App page](https://appshunter.io/ios/app/ai/id6747752410)

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

**In-app purchases:** none


## Frequently asked questions

### Is Days Matter Air free?

Days Matter Air is free to download, with in-app purchases available.

### Is 建设工程安全问题 AI识别系统 free?

建设工程安全问题 AI识别系统 is free to download, with no in-app purchases.

### Do Days Matter Air or 建设工程安全问题 AI识别系统 have ads?

建设工程安全问题 AI识别系统 shows ads; Days Matter Air does not.

---

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