# Emerald Time

> NTP-based atomic clock with customizable display and accuracy. (iPhone/iPad app by Emerald Sequoia LLC.)

- Source: https://appshunter.io/ios/app/emerald-time/id290384375 (this page in markdown: same URL + `.md`)
- Developer: [Emerald Sequoia LLC](https://appshunter.io/developer/284953673)
- Category: Utilities, Reference
- Price: Free
- Rating: 4.83/5 from 120 App Store ratings · 54 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.0 · 3 MB
- Languages: English
- Released: 2019-02-11
- Data updated: 2026-06-10
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/emerald-time/id290384375/reviews.md

## What is Emerald Time?

Emerald Time uses Network Time Protocol to display the current time of day as defined by the international standard atomic clocks.  Its accuracy is limited only by network latency and is usually accurate to less than +/-100 milliseconds. 

Features:
  - geeky stats
  - blinky lights and numbers
  - display options for 12- or 24-hour, UTC or local, seconds & tenths
  - NTP accuracy
  - leap second display
  - optional tick sounds
  - optional screen brightness control
  - night mode

(Requires Internet access.  Emerald Time does not change the internal clock used by all other iPhone apps.)

## Key features

- NTP time synchronization
- Atomic clock accuracy
- 12/24 hour format
- UTC or local time
- Seconds and tenths display
- Leap second display
- Optional tick sounds

## Recent user reviews (10 of 54)

All indexed reviews: https://appshunter.io/ios/app/emerald-time/id290384375/reviews.md

### 5/5 — Thank you!

*2023-10-30*

Grateful for the years of having this useful app. Best wishes to you guys!

### 5/5 — Is it true?

*2023-09-30*

Are these apps going away?

### 5/5 — Any comparable app?

*2023-08-20*

This will soon shut down. Does anyone know of a similar app?

### 5/5 — Great little app that just does the job

*2023-03-26*

Have been using this app for years (amazingly down to one watch now after many years of addiction). Once you understand how it works, it just simply does the job. Love the quirky little design on the main screen.

### 5/5 — Great app

*2022-09-22, version 1.9.5*

I’ve been using it to set my mechanical watches for years.

### 5/5 — Excellent NTP receiver

*2022-08-15, version 1.9.5*

And the developer updates even after 13 years! Amazing.

### 5/5 — Freaking BEAUTIFUL!

*2022-02-19, version 1.9.4*

This app is on every iOS device I own. It's PERFECT. It displays the simple, hyper-accurate time of day, but can also show me the geeky parameters I occasionally want to see in order to examine the results critically. It starts fast, locks into accuracy as quickly as Internet conditions allow (usually <5 sec) and has an elegant primary time display. Love it!

### 5/5 — Handy Time Reference

*2020-07-08, version 1.9.4*

Excellent utility for synchronizing and adjusting the time for all our clocks and devices. 👍🏻👍🏻👍🏻👍🏻👍🏻

### 5/5 — Still fantastic

*2019-11-22, version 1.9.3*

Still a fantastical stable app with the latest version of iOS 13 and the iPhone 11 Pro Max.  Fantastic app.

### 5/5 — Perfect NTP tool

*2019-10-04, version 1.9.3*

Didn’t expect such ntp tool available on iOS

## Frequently asked questions about Emerald Time

### What does Emerald Time do?

Emerald Time displays the current time synchronized to international atomic clocks using the Network Time Protocol (NTP). Its accuracy is typically within +/-100 milliseconds, limited only by network latency.

### What are the key features of Emerald Time?

Key features include NTP accuracy, display options for 12/24 hour format, UTC or local time, seconds and tenths of a second, leap second display, optional tick sounds, screen brightness control, and a night mode.

### Is Emerald Time free to use?

Yes, Emerald Time is a free application. There are no in-app purchases or advertisements mentioned in its description.

### What are the requirements to use Emerald Time?

Emerald Time requires internet access to synchronize with NTP servers. It is designed for iPhone and does not alter the device's internal clock used by other applications.

### Who would benefit from using Emerald Time?

This app is ideal for individuals who need precise timekeeping, such as developers, scientists, or anyone who appreciates highly accurate and customizable time displays with detailed statistics.

## Version history (last 1 release)

### 1.9.5 — 2022-08-15

- Support for iOS 15

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## More apps by Emerald Sequoia LLC

- [Emerald Geneva](https://appshunter.io/ios/app/emerald-geneva/id347828665)
- [Emerald Observatory for iPad](https://appshunter.io/ios/app/emerald-observatory-for-ipad/id364904759)
- [Emerald Timestamp](https://appshunter.io/ios/app/emerald-timestamp/id371935298)
- [Emerald Chronometer HD](https://appshunter.io/ios/app/emerald-chronometer-hd/id435033000)

All apps by Emerald Sequoia LLC: https://appshunter.io/developer/284953673

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*