# Millisecond Clock vs Flip Clock

The clearest difference is ads: Flip Clock at none against Millisecond Clock's shown. Flip Clock also leads on review sentiment (93% vs 73%) and update cadence (every 2 months vs every 6 months). Millisecond Clock's advantage is rating (4.7 vs 4.5). On price, ratings volume, in-app purchases and monetization model there is nothing between them.

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

Millisecond Clock holds the better App Store score, 4.7 against 4.5. Both are backed by a comparable volume of ratings — 131 and 56 respectively. Written reviews complicate that: 73% of Millisecond Clock's written reviews are positive against 93% of Flip Clock's, so the app with the better star average is not the one people write more warmly about.

Millisecond Clock ships an update every 6 months, Flip Clock every 2 months. The most recent releases landed on September 6, 2026 and September 28, 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)** | [4.5 (56 ratings)](https://appshunter.io/ios/app/flip-clock-desktop-clock/id1626613080/reviews) |
| Number of ratings | **131** | 56 |
| Positive reviews | 72.7% of reviews | **92.8% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 6 months | **Every 2 months** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 4 MB | 39 MB |
| Requires iOS | 15.0 | **9.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Chia-Chun Hsieh](https://appshunter.io/developer/908221958) | [倩喜 阮](https://appshunter.io/developer/1596634748) |

## 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-desktop-clock/id1626613080)

This app offers a minimalist desktop clock with customizable colors, fonts, and display options. It includes ambient white noise and can show the date, battery level, and punctuality reminders. It also features an automation for charging display.

**Highlights:** Minimalist desktop clock design, Over 40 white noise options, Customizable colors and transparency, 30 font styles, Optional date, battery, and reminder display, Automatic charging display automation

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| VIP | $1.99 | one-time |


## 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 in-app purchases available.

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

Millisecond Clock is rated higher. Millisecond Clock averages 4.7 out of 5 from 131 ratings, while Flip Clock averages 4.5 from 56 ratings.

### 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 September 6, 2026 and Flip Clock on September 28, 2026.

---

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