# Metric Seconds vs MillisecondTimer

The clearest difference is rating: MillisecondTimer at 5.0 against Metric Seconds's 4.5. MillisecondTimer also leads on update cadence (every 3 weeks vs every 7 months). Metric Seconds's advantage is in-app purchases (none vs 3) and ads (none vs shown). On price, ratings volume, device support and iOS requirement there is nothing between them.

Both are free to download. MillisecondTimer sells 3 in-app purchases, starting at $1.00 per month. Metric Seconds asks for nothing beyond the download.

MillisecondTimer holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 15 and 6 respectively.

Metric Seconds ships an update every 7 months, MillisecondTimer every 3 weeks. The most recent releases landed on September 30, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Metric Seconds | MillisecondTimer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (15 ratings)](https://appshunter.io/ios/app/metric-seconds/id1257282334/reviews) | **[5.0 (6 ratings)](https://appshunter.io/ios/app/millisecondtimer/id6462732415/reviews)** |
| Number of ratings | **15** | 6 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 7 months | **Every 3 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 2 MB | 30 MB |
| Requires iOS | **14.1** | 15.6 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Tangozulu R&D](https://appshunter.io/developer/373001554) | [WONJI HA](https://appshunter.io/developer/1703308182) |

## What reviewers say

### Metric Seconds

[App page](https://appshunter.io/ios/app/metric-seconds/id1257282334)

This utility app simplifies time calculations by converting to and from metric units. It allows users to tell and measure time using seconds as the base unit, with multipliers like kilo, Mega, and Giga for larger durations. It offers a fun and practical way to approach time measurement, especially for scientific or engineering contexts.

**Highlights:** Convert time to and from metric units, Tell time in metric, Measure time in metric, Uses seconds as the base unit, Supports metric multipliers (kilo, Mega, Giga), UTC-based time with no time zones

**Features:** macOS Compatibility

**In-app purchases:** none


### MillisecondTimer

[App page](https://appshunter.io/ios/app/millisecondtimer/id6462732415)

This app provides highly accurate timing tools, including a countdown timer, stopwatch, and clock, all with millisecond precision. It's designed for precise measurements in workouts, games, and everyday situations, offering background operation and seamless switching between apps.

**Highlights:** Millisecond precision timing, Countdown timer with custom intervals, Stopwatch for accurate interval recording, Real-time millisecond clock display, Background operation and notifications, Recent timers for quick reuse, Customizable 12/24 hour clock format

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MillisecondTimer Pro Month Plan | $1.00 | per month |
| MillisecondTimer Pro Annual Plan | $5.99 | per year |
| MillisecondTimer Pro Lifetime | $34.99 | one-time |


## Frequently asked questions

### Is Metric Seconds free?

Metric Seconds is free to download, with no in-app purchases.

### Is MillisecondTimer free?

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

### Which has better reviews, Metric Seconds or MillisecondTimer?

MillisecondTimer is rated higher. Metric Seconds averages 4.5 out of 5 from 15 ratings, while MillisecondTimer averages 5.0 from 6 ratings.

### Do Metric Seconds or MillisecondTimer have ads?

MillisecondTimer shows ads; Metric Seconds does not.

### Which is updated more often, Metric Seconds or MillisecondTimer?

Metric Seconds ships an update every 7 months, and MillisecondTimer every 3 weeks. Most recently, Metric Seconds was updated on September 30, 2026 and MillisecondTimer on October 2, 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.*