# GPS NTP Clock — Exact time OS-NTP-GPS

> Compares device time with NTP and GPS for precise time verification. (iPhone/iPad app by Claudio Alebardi.)

- Source: https://appshunter.io/ios/app/gps-ntp-clock/id1543897440 (this page in markdown: same URL + `.md`)
- Developer: [Claudio Alebardi](https://appshunter.io/developer/1496514254)
- Category: Utilities
- Price: $13.99
- Rating: 5.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 13.0 · 1 MB
- Languages: English
- Released: 2020-12-15
- Data updated: 2026-06-22
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/gps-ntp-clock/id1543897440/reviews.md

## What is GPS NTP Clock?

Are you sure that the time on your iPhone is correct? Check its accuracy! With this app we allow you to compare the time of your device with the universal time measurement system. The app shows the time received from the internet via NTP protocol and also the time received from the GPS of your iPhone.
Two special verification fields measure the offset between the clocks and display the updated result every few seconds.
The app consists of:
• Device clock: displays the current time of the device itself including milliseconds, already corrected with the local time-zone.
• Device time (UTC): displays the system timestamp when the time is received via NTP protocol.
• NTP time (Network Time Protocol): displays the exact time received via NTP query. This app makes the request on the pool.ntp.org server.
• Difference (-NTP): field with the offset between the UTC system time (Coordinated Universal Time) and the NTP time.
• Device time (UTC): displays the system timestamp when the time is received from the iPhone's GPS.
• GPS (Geographic Position System) time: displays the exact time received from the atomic clocks present on the satellites of the GPS system. The time shown (UTC) includes the correction of 18 seconds of leap. The timestamp displayed is provided by the operating system and not directly by the gps chip.
• Difference (-GPS): field with the offset between the UTC (Coordinated Universal Time) system time and the GPS time.
Buy now GPS-NTP-Clock to know the exact time from your iPhone!

## Key features

- Compares device time with NTP
- Compares device time with GPS
- Displays time offsets
- Shows device clock with milliseconds
- Utilizes pool.ntp.org servers
- Corrects for GPS leap seconds


## Frequently asked questions about GPS NTP Clock

### What is GPS NTP Clock?

GPS NTP Clock is a utility app that allows you to verify the accuracy of your iPhone's time. It compares your device's clock against time received from NTP servers and GPS satellites.

### How accurate is the time displayed by GPS NTP Clock?

The app displays time from NTP servers and GPS satellites, which are based on universal time measurement systems. It highlights any offset between your device's clock and these accurate sources.

### Does GPS NTP Clock work offline?

To receive accurate time from NTP servers or GPS, an internet connection or clear view of the sky for GPS signals is generally required. The app itself functions on supported devices.

### What devices does GPS NTP Clock support?

GPS NTP Clock is available for iPhone, iPad, and iPod touch devices.

### What is the price of GPS NTP Clock?

GPS NTP Clock is a paid application, priced at $13.99.

### When was GPS NTP Clock last updated?

The latest version of GPS NTP Clock was released on December 16, 2020, with version 1.0.

### What is the age rating for GPS NTP Clock?

GPS NTP Clock has an age rating of 4+, making it suitable for a wide range of users.

### How does GPS NTP Clock handle GPS leap seconds?

The app accounts for the 18-second leap second correction when displaying GPS time, ensuring it aligns with Coordinated Universal Time (UTC).

## Version history (last 1 release)

### 1.0 — 2020-12-16

No release notes.

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## More apps by Claudio Alebardi

- [MusicSync - my show!](https://appshunter.io/ios/app/musicsync-my-show/id1610182210)

All apps by Claudio Alebardi: https://appshunter.io/developer/1496514254

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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 2026-06-22.*