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GPS Diagnostic: Satellite Test

GPS Diagnostic: Satellite Test

Precise Coordinates & Altitude

530 ratings
208 reviews
#53 in paid Navigation
🔧 Utilities
🗺️ Navigation
$2.99
In-App Purchases

Details

  • Released
  • Updated
  • September 10, 2015
  • June 25, 2020

Features

Developer

David Ryall
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GPS Diagnostic: Satellite Test video #1 for iPhone
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GPS Diagnostic: Satellite Test screenshot #7 for iPhone
iphone
ipad
🧾Free
In-App Purchase↘︎
📉no. 53
Charts↘︎
📌Ready
Reviews summary↘︎
⭐208
Reviews↘︎
📝6+ tags
Tags↘︎
🔄6+ apps
Alternatives↘︎
❓5 answered
FAQ↘︎
📦w/o updates
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About

This app tests your device's GPS module, providing precise navigation parameters and diagnosing location issues. It supports multiple satellite systems and offers advanced coordinate conversions through an in-app purchase.

✓Test GPS module
✓Fast GPS lock time
✓Precise navigation parameters
✓GPS "JumpStart" technology
✓Full satellite system support
✓Additional coordinate systems (IAP)
Show original description

What users say

Summarized from real user reviews of GPS Diagnostic. Based on 530 reviews and a 4.6/5 average, it highlights the 6 positives and 4 negatives reviewers mention most about this Navigation app.

Positive things

  • 👍Helpful diagnostic tool
  • 🚀Provides detailed GPS information
  • 🔧Useful for troubleshooting GPS issues
  • 💡Allows resetting GPS receiver
  • 👍Clean and intuitive interface
  • 🔍Accurate GPS data

Negative things

  • 🐛Compatibility issues with newer iOS versions
  • 🔍Limited satellite data display (only 4 bars)
  • 📝Email support button not working
  • 🔍Lacks detailed information on satellite types
See all reviews

What's New in GPS Diagnostic

3.6

June 25, 2020

80% reduction in file size to 35MB. Full support for latest iPad Pro 4th Generation.

1

In-App Purchases

Free

Coordinates-Pro

USNG, MGRS, UTM, GARS, GEOREF, OSGB

Charts

Top Paid

📉 53-13

Navigation

This app dropped -13 positions in Navigation chart.

Last updated on July 30, 2026.

User reviews

Most RecentHighest RatedLowest Rated

Very Useful Utility

I’ve been using GPS Diagnostic for years. Very useful, especially for an accurate speedometer. Thanks!
0xfd0xfd

Poor documentation and support

The documentation is just screenshots that explain the blindingly obvious with no necessary detail. The email support button cannot find the email app on my iPhone. Manually emailing the developer is ignored. So, when it gives you baffling responses (like a question mark next to GPS installed hardware) you are on your own trying to work out what that means. It’s not a lot of money - but it is wasted.
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SteveCWSteveCW

Diagnostic Window

Diagnostic window only shows wifi compass and bluetooth with a green tick. cellular is blank and Gps shows a ? Any ideas as to why this is so.
DuckettyDucketty

SEE WHAT SATELLITES YOU HAVE CONNECTED

This is great for trouble shooting your gos on your phone
Bazza McKenzieBazza McKenzie

垃圾

诊断页 GPS 和蜂窝都无显示，且测试卫星信号强度与实际不符。这玩意是逗我玩的吧
JcrelJcrel
See 203 more reviews

Developer apps

Compass Guru - Digital Heading & Bearing
Compass Guru - Digital Heading & Bearing

by David Ryall

🗺️ Navigation

(25)

Free
See developer apps

User experience

🐞

Reported Bugs

2 issues

Crashes on startup for some users

Bug

Fails to detect GPS signal on certain devices

Bug
✨

Requested Features

4 requests

Display number of satellites in view and locked

Feature

Expand satellite signal strength graph to show more satellites

Feature

Add support for landscape mode

Feature

Provide more detailed GPS information (e.g., HDOP, VDOP)

Feature

FAQ

What does the GPS Diagnostic: Satellite Test app do?

This app is designed to test your iPhone or iPad's GPS module, providing precise navigation parameters like latitude, longitude, altitude, speed, and course. It also helps diagnose why location cannot be determined and assists in achieving a reliable location under changing conditions.

What are the key features of this GPS app?

Key features include testing the GPS module, fast GPS lock times, precise navigation parameters, and GPS "JumpStart" technology to resolve issues with third-party navigation apps. It fully supports GPS, Galileo, GLONASS, and QZSS satellite systems, and includes a speedometer, altimeter, and compass.

Is the app free to use?

The app offers free basic functionality, including essential GPS diagnostics and standard coordinate systems like Latitude & Longitude. Advanced features, such as additional coordinate systems like USNG, MGRS, and UTM, along with 174 different datums, are available through an in-app purchase called "COORDINATES-PRO".

What devices is this app compatible with?

The app is an essential tool for your iPhone and iPad. It utilizes the internal GPS of these Apple devices to provide its diagnostic and navigation functionalities.

How can this app help with navigation or checking a new phone?

This app can help kick-start navigation apps by ensuring a reliable GPS fix. Users have found it useful for checking if the GPS is operational on a new phone, especially when purchasing used devices, to avoid returning multiple units with faulty GPS.