GPS Diagnostic: Satellite Test

🇺🇸 United States
David Ryall  | 
51
ASO score
Text
53/100
Reviews
50/100
Graphic
60/100
Other
0/100
rating
App Rating
4.5
rating
Votes
1.58K
rating
App Age
10y 6m
rating
Last Update
Aug 31, 2020
rating
iAP
JPY120 - 980

Compare with Category Top Apps

Metrics
Current App
Category Top Average
Difference
Rating
4.42
4.56
-3%
Number of Ratings (Voted)
1.6K
266.2K
-99%
App Age
10y 6m
9y 2m
+15%
Price
$3
$1
+492%
In-app Purchases Price
$0
$38
Update Frequency
1931d
65d
+2 849%
Title Length
30
24
+25%
Subtitle Length
30
27
+11%
Description Length
3 580
2 572
+39%
Number of Screenshots
559
1467
-62 %
Size
0MB
159MB

Category Ranking in United States

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19
46
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Top Dec 06, 2025 Dec 13, 2025
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46

Ranking Keywords in United States

Keywords App Rank
họ đoàn
2 6 2
положение
out out
navmii offline gps russia
3 9 3
자전거 속도계 및 내비게이션
out out
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Text ASO

Title (
Characters: 30 of 30
)
GPS Diagnostic: Satellite Test
Subtitle (
Characters: 30 of 30
)
Precise Coordinates & Altitude
Description (
Characters: 3580 of 4000
)
KEY FEATURES: - Essential tool for your iPhone & iPad. - Test the GPS module. - Fast GPS lock time. - Precise navigation parameters. - Supplements operation of your navigation apps. - GPS "JumpStart" technology. - If location cannot be determined then it diagnoses why. - Assists you in changing conditions to get a reliable location. - GPS, Galileo, GLONASS, QZSS full support. - Latitude & Longitude, and WGS84 included by default. - In-App Purchase: USNG, MGRS, UTM, OSNG, GEOREF, GARS & 174 Datums (free basic functionality). - **NEW** Smaller footprint (now only 35MBytes) - Free technical and customer support by email. -------------------------------------- OVERVIEW: - Lodestone Chart™ displays all essential GPS satellite information using a chart with only 4 bars. This dramatically simplifies the diagnostic process (Registered Copyright). - GPS "JumpStart" technology may resolve GPS problems with third-party navigation applications that have a frozen location, are slow to respond or are performing inaccurately. - Uses the internal GPS of your iPhone or iPad. - Includes a Speedometer, Altimeter and Compass. - Location and altitude ( best-in-class accuracy and reliability ) - Speed (SOG) and Course (COG). - Heading (i.e. Compass) with ability to turn on and off the manual compass calibration. -------------------------------------- IN-APP PURCHASE (IAP) = "COORDINATES-PRO"   This adds additional coordinate systems and datums to the app to let you accurately work with many paper maps and charts used by civilians, U.S. military and NATO forces for walking, sailing, and flying. The coordinate systems and datums included are: - United States National Grid (USNG) - Military Grid Reference System (MGRS) -Old and New - Universal Transverse Mercator (UTM) - Ordnance Survey National Grid (OSNG) for Great Britain - World Geographic Reference System (GEOREF) - Global Area Reference System (GARS) - 174 Datums (e.g. WGS84, NAD83, NAD27, WGS72, ED50, ED79, OSGB36 etc....). -------------------------------------- REVIEWS: - The developer is a professional software and hardware engineer working in the satellite space industry. He is a yachtmaster and pilot with a passion for navigation and Apple products. - Consistent 5 star reviews, see what users are saying: "Perfect Diagnostic Tool - This is the best app if you need to know the actual status of the internal GPS." "Great app for kick starting navigation apps - This app finds a position every time and then all other nav apps work." "Excellent application - This was a much needed application for iOS devices." “I love the app. It’s been great to have when buying a new phone from eBay to check that the GPS is working. I had to return 3 phones last time before I got one with operational GPS.” "Awesome, over used term but this app is - This app does what other developers said they could not do." -------------------------------------- MORE INFORMATION: - Hardware information - Accuracy of measurements shown for pro users. - Imperial, metric and nautical units. These are the most commonly used and most useful navigation units. All easily changeable from the screen in use. - Does not require internet access and does not use cellular data. - Essential tool for any power user. (e.g. navigators, yachtsmen, pilots, app developers) - Share your location by text message, email etc. The format contains all essential information for improved accuracy. - Works with Garmin Glo. - GPS Diagnostic™ is a professional GPS test and measurement utility for your iPhone and iPad.}
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Rating & Reviews

Reviews Overview
🧐 Coming Soon…
Rating
4.5
1 583 voters

Some Latest Reviews

Bazza McKenzie
02 Dec, 2025
5
This is great for trouble shooting your gos on your phone
petruc
08 Aug, 2025
5
Todas as funções liberadas com o pagamento único da compra. Informação certa e completa, sem frescuras.
falcon2809
14 Jul, 2025
2
GPS Modul Iphone 16 not more recognized. No Support for actuel IOS Version !
trakais
04 Jun, 2025
3
App says it supports Galileo and other systems, but actually they are all labeled as GPS and you can't know which one is used. Disappointing
JAY.YYY.JAY
29 Apr, 2025
5
Got the app and had a question. Emailed David and he responded immediately to help me figure out my GPS issue.
Joe28066
28 Feb, 2025
5
Great product. Helped me diagnose some gps questions relating to a website we were developing. Very simple to use. Wish the Lodestone graph had one more bar to see when I have a 5th satellite.
Fhdruhfvjj
16 Dec, 2024
5
Easy to use and not more complex than necessary. Great for sending my location.
Ymartin
12 Oct, 2024
3
Not enough information about the gps network used (GPS (USA Navstar), GLONASS (Russia), QZSS (Japan), BeiDou/COMPASS (China), Galileo (European Union))
TomTester
30 Sep, 2024
4
App gefällt mir, auch weil nicht „geschnüffelt“ wird. Toll wäre noch, bei zB einem Klick auf die Balken den empfangenen Sat-Namen und das GNSS-System (GPS, GLONASS, BEIDOU oder Galileo oa) zu sehen und nicht nur 4+, sondern bei einem Klick auch die tatsächliche Anzahl der empfangenen Satelliten, zB so, wie es die App StelliteInfoGPS vormacht, mit Sicht nach oben usw. Garmin zeigt sowas ja auch seit langem auf den Hand-GPS-Empfängern an… Dann gäbs auch 5* von mir… Danke!

Other

Additional Information
Rating:
4.46
Voted: 1.58K
App Store Link:
Price: 2.99 $
Website:
Email: -
Privacy Policy:
Categories: Navigation, Utilities
Size: -
iAP: 120 - 980 JPY
App Age: 10 years 6 months
Release Date: Jun 05, 2015
Last Update: Aug 31, 2020
Version: 1.2.8
Version history
1.2.8
Aug 31, 2020
- Bugfixes
3.6
Jun 25, 2020
80% reduction in file size to 35MB. Full support for latest iPad Pro 4th Generation.
Version history