# Millisecond Clock vs MD Clock

The clearest difference is monetization model: Millisecond Clock at free with in-app purchases against MD Clock's subscription. Millisecond Clock also leads on review sentiment (73% vs 47%). MD Clock's advantage is ads (none vs shown) and update cadence (every 11 days vs every 6 months). On price, rating, in-app purchases and device support there is nothing between them.

Both are free to download. Millisecond Clock sells 3 one-off in-app purchases and MD Clock sells 14 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.7 for Millisecond Clock against 4.6 for MD Clock. That said, the two scores are not equally well evidenced: MD Clock has 6.6K ratings behind it against 131, 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 47% of MD Clock's.

Millisecond Clock ships an update every 6 months, MD Clock every 11 days. The most recent releases landed on September 6, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | Millisecond Clock | MD Clock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (131 ratings)](https://appshunter.io/ios/app/millisecond-clock/id1526615560/reviews)** | [4.6 (6.6K ratings)](https://appshunter.io/ios/app/md-clock-flip-clock/id1536358464/reviews) |
| Number of ratings | 131 | **6.6K** |
| Positive reviews | **72.7% of reviews** | 47.4% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 6 months | **Every 11 days** |
| Monetization | **Free with in-app purchases** | Subscription |
| Size | 4 MB | 384 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) | [MD Studio](https://appshunter.io/developer/1438854445) |

## 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 |


### MD Clock

[App page](https://appshunter.io/ios/app/md-clock-flip-clock/id1536358464)

A beautifully designed digital clock app offering a variety of themes and customization options. It supports dynamic widgets, StandBy mode, and multiple timers and alarms, enhancing your workspace and daily routines.

**Highlights:** 24 exquisite themes, Liquid Glass design adaptation, Customizable widgets, StandBy mode support, Multiple timers and alarms, Refined animation and sound effects

**Features:** Family Sharing, Vision Pro support

**In-app purchases (14)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MD Clock Premium (1 MONTH) | $0.99 | per month |
| MD Clock Premium | $1.99 | per 7 days |
| MD Clock Premium (1 YEAR) | $4.49 | per year |
| MD Clock Premium | $4.49 | per year |
| MD Clock Premium | $4.49 | per year |
| MD Clock Premium | $9.99 | per year |
| Black white & grey | $0.99 | one-time |
| Wood | $0.99 | one-time |
| AllTools | $4.99 | one-time |
| All Clocks | $5.99 | one-time |
| MD Clock Premium | $8.99 | one-time |
| MD Clock Premium | $9.99 | one-time |
| MD Clock Premium | $12.99 | one-time |
| MD Clock Premium | $24.99 | one-time |

**What reviewers like**

- 🚀 Smooth performance
- 👍 Aesthetically pleasing designs
- 🔒 Secure and reliable
- 💡 Useful widget functionality

**What reviewers complain about**

- 💰 Majority of features locked behind paywall
- 🐛 Inconsistent widget behavior
- 🔋 Potential battery drain issues
- 📦 Limited free clock options

**Reported bugs**

- Widgets not loading properly
- Clock time inaccuracies
- Subscription issues across devices

**Requested features**

- Add more free clock designs
- Allow customization of widget backgrounds
- Implement multi-timezone support
- Integrate with Apple Music for alarm tones


## Frequently asked questions

### Is Millisecond Clock free?

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

### Is MD Clock free?

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

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

Millisecond Clock is rated higher. Millisecond Clock averages 4.7 out of 5 from 131 ratings, while MD Clock averages 4.6 from 6.6K ratings.

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

Millisecond Clock shows ads; MD Clock does not.

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

Millisecond Clock ships an update every 6 months, and MD Clock every 11 days. Most recently, Millisecond Clock was updated on September 6, 2026 and MD Clock on September 23, 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.*