# 无眠 vs Flip Clock 3D

The clearest difference is update cadence: Flip Clock 3D at weekly against 无眠's every 10 months. Flip Clock 3D also leads on iOS requirement (12.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. 无眠 sells 1 one-off in-app purchase and Flip Clock 3D sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

无眠 ships an update every 10 months, Flip Clock 3D weekly. The most recent releases landed on October 25, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | 无眠 | Flip Clock 3D |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.8 (25 ratings)](https://appshunter.io/ios/app/flip-clock-3d-study-time/id6670719398/reviews)** |
| Number of ratings | — | **25** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 10 months | **Weekly** |
| Monetization | — | Free with in-app purchases |
| Size | 41 MB | 206 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [坤 张](https://appshunter.io/developer/1415616112) | [乃君 黄](https://appshunter.io/developer/1337343608) |

## What reviewers say

### 无眠

[App page](https://appshunter.io/ios/app/id1488413414)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock all sounds | $1.99 | one-time |


### Flip Clock 3D

[App page](https://appshunter.io/ios/app/flip-clock-3d-study-time/id6670719398)

Enhance your workspace with a realistic 3D mechanical flip clock. This app helps improve focus and productivity during work or study sessions by providing a clear time display. Customize with various fonts and themes, and utilize the alarm feature when the app is active.

**Highlights:** Vivid 3D mechanical components, Adjustable viewing angles, 12/24 hour mode switching, Multiple font and theme options, Foreground alarm functionality

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock all contents | $1.99 | one-time |


## Frequently asked questions

### Is 无眠 free?

无眠 is free to download, with in-app purchases available.

### Is Flip Clock 3D free?

Flip Clock 3D is free to download, with in-app purchases available.

### Do 无眠 or Flip Clock 3D have ads?

Both 无眠 and Flip Clock 3D show ads.

### Which is updated more often, 无眠 or Flip Clock 3D?

无眠 ships an update every 10 months, and Flip Clock 3D weekly. Most recently, 无眠 was updated on October 25, 2026 and Flip Clock 3D on October 30, 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.*