# GPS Diagnostic: Satellite Test — user reviews > 209 indexed App Store user reviews of GPS Diagnostic by David Ryall, rated 4.70/5 from 546 ratings. - Source: https://appshunter.io/ios/app/gps-diagnostic-satellite-test/id1020967894/reviews - App overview in markdown: https://appshunter.io/ios/app/gps-diagnostic-satellite-test/id1020967894.md - Rating breakdown: 5★ 456 · 4★ 43 · 3★ 17 · 2★ 8 · 1★ 22 ## What do users think of GPS Diagnostic? Overall sentiment: positive **Pros** - 👍 Helpful diagnostic tool - 🚀 Provides detailed GPS information - 🔧 Useful for troubleshooting GPS issues - 💡 Allows resetting GPS receiver - 👍 Clean and intuitive interface - 🔍 Accurate GPS data **Cons** - 🐛 Compatibility issues with newer iOS versions - 🔍 Limited satellite data display (only 4 bars) - 📝 Email support button not working - 🔍 Lacks detailed information on satellite types **Commonly reported bugs** - Crashes on startup for some users - Fails to detect GPS signal on certain devices **Most requested features** - Display number of satellites in view and locked - Expand satellite signal strength graph to show more satellites - Add support for landscape mode - Provide more detailed GPS information (e.g., HDOP, VDOP) ## Newest reviews (12 of 209) ### 4/5 — Diagnostic Window *2026-01-15, version 3.6* 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. ### 2/5 — updates?? *2025-07-14* GPS Modul Iphone 16 not more recognized. No Support for actuel IOS Version ! ### 3/5 — Good but not enough information *2024-10-12, version 3.6* Not enough information about the gps network used (GPS (USA Navstar), GLONASS (Russia), QZSS (Japan), BeiDou/COMPASS (China), Galileo (European Union)) ### 5/5 — Great app *2024-02-11, version 3.6* Now I know why navigation says to turn in 50 feet after I was supposed to have turned! ### 4/5 — Soweit gut aber *2023-11-28* Soweit ganz gut, aber es wäre noch klasse, wenn die Anzahl der verbundenen Satelliten angezeigt werden würde. Dann gäbe es 5 anstatt 4 Sterne. ### 5/5 — 만족 *2023-10-10* 필요한 정보 직관적이고 편리하고 좋네요 ### 5/5 — Revision of earlier review: iOS 17 working fine now *2023-09-24, version 3.6* Works great now. ### 2/5 — Doesn't seem to be seeing GPS with iOS 17.0.1 *2023-09-22* Don't know what's up with this. I'm guessing that something might have broken with the new OS major version. The checklist of location sources says "?" for GPS and there's no GPS sat bargraph bars displayed. Also, I tried to use the in app email to reach the developer, but the app says I don't have an email configured for this app and I'm not sure how to do that. I don't see the app enumerated in iOS's "Settings". FWIW, I use Gmail. If/when this problem is resolved for me, I will most likely rate this app five stars. ### 5/5 — Great *2023-09-14* Thanks for the app which is now installed on my iPad minin first Generation (2012). It shows that the Modul is working which gives me confidence using the tool in flight. ### 5/5 — A Masterclass in App Design and Functionality *2023-09-13, version 3.6* The GPS Diagnostic app is nothing short of phenomenal. It’s incredibly refreshing to find an app that not only meets but far exceeds expectations. Where do I even start? First off, the user interface is clean and intuitive. The app is surprisingly easy to use but doesn’t compromise on the depth of its features or settings. Navigating through the options feels like a breeze, thanks to thoughtful design choices. What sets this app apart is the exceptional in-app help and documentation. Far beyond what one would expect, it offers just the right amount of information, in just the right place, at just the right time. The attention to detail in providing this support is truly remarkable and way above the prevailing standard. Overall, GPS Diagnostic is a shining example of what an app should be: functional, user-friendly, and respectful of its users’ intelligence. I couldn’t recommend it more highly. ### 5/5 — Excellent tool for troubleshooting and speed measurement *2023-05-29, version 3.6* I successfully used this app to confirm the quality of the reception of satellite data. Months later I find myself in Japan on the Shinkansen “bullet” train wondering how fast we are traveling. This app provided the answer. In case you are wondering, we were traveling about ~275 km/hr! ### 5/5 — Very useful *2022-11-21, version 3.6* Does what it says on the tin. ## Most critical reviews (10 lowest-rated) ### 1/5 — Poor documentation and support *2026-01-16, version 3.6* 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. ### 1/5 — 垃圾 *2025-09-27* 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 ### 1/5 — . *2025-05-24* Доброе времени .для iOS 18.5 актуально? ### 1/5 — 骗钱 *2024-08-10* 垃圾 根本用不了功能 骗钱 ### 1/5 — Не работают *2024-05-07* Верните деньги ! Приложение не работает! ### 1/5 — Useless on iPhone *2024-03-31* Not showing correct GPS hardware. Developer acknoledge the issue and promised to solve it but never did. better save your money here. ### 1/5 — Deduct *2023-03-31, version 3.6* I think it may have worked, but now - zilch! I can only assume that the developer has pulled the plug on it; a shame really as I rather need it at the moment. C’est la vie! ### 1/5 — 환불해주세요ㅠ *2022-11-24* 제가 찾는게 아니에요.. ### 1/5 — Mit iOS 16 nicht zu gebrauchen *2022-10-10* Unter iOS 16 werden keine Satelliten gefunden. Die App ist daher für mich nunmehr nutzlos. Auf dem iPad mit iPadOS 15.7 funktioniert die App noch wie gewohnt. ### 1/5 — Works great *2022-09-12, version 3.6* Very useful app. I really like that it shows your Lat & Lon!! I’m not sure why but it was the only GPS app that worked on the plane! It was nice to see the ground speed and altitude Update - for some reason it no longer works?? I know my GPS is still working because all my apps that rely on it still work perfectly but according to this app it’s not receiving a signal from any satellites! It worked good for years and it just quit . Doesn’t display anything. Tried all the usual things . Restarted my phone checked for updates nothing helped. ## Most praised reviews (10 highest-rated) ### 5/5 — Perfect Partner to iNavX *2026-06-20, version 3.6* Just got a new-to-me iPad to use iNavX at a better size than my phone. Panicked when that and map apps, barometer nor any gps apps were working. Read the reviews, downloaded this to find that this little old(er) tablet needs a clearer view of the sky to find satellites than my iPhone does. iNavX is happy now - I am where it thinks I am. Still gonna keep this open right beside the nav app because I can see what this is doing. Excellent app - Thank You! ### 5/5 — Very Useful Utility *2026-04-12, version 3.6* I’ve been using GPS Diagnostic for years. Very useful, especially for an accurate speedometer. Thanks! ### 5/5 — SEE WHAT SATELLITES YOU HAVE CONNECTED *2025-12-01, version 3.6* This is great for trouble shooting your gos on your phone ### 5/5 — Excelente *2025-08-08* Todas as funções liberadas com o pagamento único da compra. Informação certa e completa, sem frescuras. ### 5/5 — Good communication *2025-04-29, version 3.6* Got the app and had a question. Emailed David and he responded immediately to help me figure out my GPS issue. ### 5/5 — Review *2025-02-28, version 3.6* 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. ### 5/5 — So good! *2025-01-22, version 3.6* It works perfectly. ### 5/5 — Simple and bug free *2024-12-16, version 3.6* Easy to use and not more complex than necessary. Great for sending my location. ### 5/5 — Immer noch gut *2024-10-06* Doch immer wieder kommt es bei GPS Kartenanwendungen zu Problemen. Der Standort wird nicht / nicht präzise gefunden. Kurz in diese App schauen, alle Unsicherheiten werden deutlich und alles klar! ### 5/5 — Brilliant! *2024-06-08, version 3.6* After a few days of use, this APP seems to be providing EXACTLY what I was looking for, including “where the heck am I”🤷🏻‍♂️🤡 and how many satellites are being used at any given point to substantiate that. Thank-you --- *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 2026-09-08.*