# SimpleClock vs Millisecond Clock

The clearest difference is ads: SimpleClock at none against Millisecond Clock's shown. SimpleClock also leads on update cadence (every 2 weeks vs every 6 months) and review sentiment (100% vs 73%). Millisecond Clock's advantage is ratings volume (131 vs 3). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

SimpleClock holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Millisecond Clock has 131 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 100% of SimpleClock's written reviews are positive against 73% of Millisecond Clock's.

SimpleClock ships an update every 2 weeks, Millisecond Clock every 6 months. The most recent releases landed on October 1, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | SimpleClock | Millisecond Clock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/simpleclock-good-for-studying/id1517303911/reviews)** | [4.7 (131 ratings)](https://appshunter.io/ios/app/millisecond-clock/id1526615560/reviews) |
| Number of ratings | 3 | **131** |
| Positive reviews | **100.0% of reviews** | 72.7% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 2 weeks** | Every 6 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 11 MB | 4 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Reo Shigeno](https://appshunter.io/developer/1788864693) | [Chia-Chun Hsieh](https://appshunter.io/developer/908221958) |

## What reviewers say

### SimpleClock

[App page](https://appshunter.io/ios/app/simpleclock-good-for-studying/id1517303911)

A customizable clock app designed for studying, offering a clean interface with no ads or charges. Personalize the background, font, and text color, and utilize built-in stopwatch and timer functions. Widgets are now available for enhanced convenience.

**Highlights:** Customizable clock appearance, No ads or charges, Stopwatch function, Timer function, Widget support, Dark mode support

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Cheer for the developer | $0.49 | one-time |
| Cheer for the developer | $2.99 | one-time |
| Cheer for the developer | $5.99 | one-time |


### 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 |


## Frequently asked questions

### Is SimpleClock free?

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

### Is Millisecond Clock free?

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

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

SimpleClock is rated higher. SimpleClock averages 5.0 out of 5 from 3 ratings, while Millisecond Clock averages 4.7 from 131 ratings.

### Do SimpleClock or Millisecond Clock have ads?

Millisecond Clock shows ads; SimpleClock does not.

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

SimpleClock ships an update every 2 weeks, and Millisecond Clock every 6 months. Most recently, SimpleClock was updated on October 1, 2026 and Millisecond Clock on October 14, 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.*