# Millisecond Clock vs Flip Clock

The clearest difference is in-app purchases: Flip Clock at none against Millisecond Clock's 3. Flip Clock also leads on ads (none vs shown) and review sentiment (100% vs 73%). Millisecond Clock's advantage is ratings volume (131 vs 21). On price, rating, device support and iOS requirement there is nothing between them.

Both are free to download. Millisecond Clock sells 3 one-off in-app purchases. Flip Clock asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.7 for Millisecond Clock against 4.7 for Flip Clock. That said, the two scores are not equally well evidenced: Millisecond Clock has 131 ratings behind it against 21, so its average is the more settled of the two. Written reviews are what separate them: 73% of Millisecond Clock's written reviews are positive against 100% of Flip Clock's.

Millisecond Clock ships an update every 6 months, Flip Clock every 2 months. The most recent releases landed on October 1, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | Millisecond Clock | Flip Clock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (131 ratings)](https://appshunter.io/ios/app/millisecond-clock/id1526615560/reviews) | [4.7 (21 ratings)](https://appshunter.io/ios/app/flip-clock-focus-timer/id6449533077/reviews) |
| Number of ratings | **131** | 21 |
| Positive reviews | 72.7% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 6 months | **Every 2 months** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 4 MB | 15 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Chia-Chun Hsieh](https://appshunter.io/developer/908221958) | [裕涛 兰](https://appshunter.io/developer/1624361053) |

## What reviewers say

### Millisecond Clock

[App page](https://appshunter.io/ios/app/millisecond-clock/id1526615560)

This app displays the most accurate time available, down to the millisecond. It's useful for measuring network delays or video streaming lag by comparing displayed time differences.

**Highlights:** Millisecond precision time display, Accurate timekeeping for iPhone and iPad, Network delay measurement, Video streaming lag analysis, Free to download

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |
| Special Offer Package | $2.99 | one-time |
| Unlock Themes | $3.99 | one-time |


### Flip Clock

[App page](https://appshunter.io/ios/app/flip-clock-focus-timer/id6449533077)

This app offers a visually stunning and artistic way to display time on your device. It combines unique clock face designs with useful features like a Pomodoro timer and relaxing music. Customize the look with various themes, colors, and fonts to match your personal style.

**Highlights:** Artistic clock faces, Pomodoro timer, Stopwatch, Relaxing music, Customizable themes, Dark mode

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Millisecond Clock free?

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

### Is Flip Clock free?

Flip Clock is free to download, with no in-app purchases.

### Which has better reviews, Millisecond Clock or Flip Clock?

Millisecond Clock and Flip Clock are both rated 4.7 out of 5 on the App Store, from 131 and 21 ratings respectively.

### Do Millisecond Clock or Flip Clock have ads?

Millisecond Clock shows ads; Flip Clock does not.

### Which is updated more often, Millisecond Clock or Flip Clock?

Millisecond Clock ships an update every 6 months, and Flip Clock every 2 months. Most recently, Millisecond Clock was updated on October 1, 2026 and Flip Clock on September 24, 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.*