GPS Diagnostic: Satellite Test is a professional-grade utility for high-precision GPS hardware verification, serving navigators, pilots, and developers. It is positioned as a technical diagnostic tool rather than a navigation aid, featuring proprietary 'JumpStart' technology to resolve location freezes in third-party apps. While it maintains a strong niche ranking (#32 Paid in Category), it is currently in a maintenance-only state with no updates since 2020.
Product velocity
Dormant
Daily rank 🇺🇸
#31
▲11Navigation · paid
Sentiment
4.7
541 reviews
Nemesis
MilGPS
The App DNA
What makes this app unique?
For Power users including professional navigators, yachtsmen, pilots, and app developers requiring high-precision GPS diagnostics.
What does it look like?
Key features
Proprietary technology to resolve frozen, slow, or inaccurate location data in third-party navigation apps.
Simplified diagnostic visualization using a 4-bar chart to display satellite information.
Support for USNG, MGRS, UTM, OSNG, GEOREF, and GARS via IAP.
How much does it cost?
The app uses a low-cost upfront purchase model targeting professional users, with specialized IAP for military and survey-grade coordinate systems.
Velocity
Dormant developmentperformanceplatform expansionShow more...
Development has ceased, with no significant feature updates or maintenance patches released in nearly six years. The last recorded update occurred on June 25, 2020, focusing on file size optimization and hardware support. The app is classified as a zombie project due to the extreme inactivity.
Who built it?
David Ryall
2 apps tracked · Navigation
Compass Guru - Digital Heading & BearingUser Sentiment
What do users think recently?
Review voice lately leans thrilled. Users appreciate hardware diagnostic utility and simplicity and ui design, but report limited satellite visualization.
How are ratings & reviews evolving?
What users say, by theme
- Hardware Diagnostic Utility
- Simplicity and UI Design
Unlock 1 more frustration theme, each backed by review evidence.
Access the full report for freeCompetition
Competitive landscape for GPS Diagnostic: Satellite Test
How's the Navigation market?
The rivals identified
By Cascode Labs Pty Ltd
MilGPS operates in the same high-precision GPS utility niche and sits exactly at the 10x scale threshold (5.4k vs 541 ratings) with a high-velocity update cadence.
- Focuses on professional field use (MGRS, UTM, and mapping) whereas this app focuses on hardware-level signal diagnostics.
- Maintains a modern release cycle (2 updates in the last 6 months) compared to this app's 4-year maintenance gap.
- Provides offline mapping and waypoint navigation, moving beyond this app's 'dashboard-only' signal readout.
Unlock the head-to-head verdict: where this rival wins, and where it loses.
Access the full report for freeThe Analyst's Read
Key takeaways for GPS Diagnostic: Satellite Test
Where is it heading?
- Last updated June 2020 — indicates maintenance mode rather than active investment.
- Ranked #32 Paid (↑48) — shows resilient demand for the core diagnostic value proposition.
- User mood is 'Excellent' but technical complaints regarding iPhone 11 compatibility are emerging.
The SWOT
- Proprietary JumpStart technology
- Offline functionality (no data required)
- Professional industry-expert pedigree
- Small 35MB footprint
- Expand satellite visualization to 8+ bars
- Add landscape orientation for cockpit mounting
- Modernize UI for latest iOS versions
Next best moves
Expand Lodestone Chart to 8+ bars
+ 2 more prioritized movesFeature gaps
Offline mapping and waypoint navigation (available in MilGPS) +2
Bottom line
GPS Diagnostic is a high-utility legacy tool with a unique 'JumpStart' moat, but it is currently at risk of obsolescence. To defend its #32 category ranking against the actively maintained MilGPS, the PM must address the 4-year update gap and expand satellite visualization beyond the current 4-bar limit.
Unlock 4 critical frictions, 3 market threats, 2 more prioritized moves and the analyst’s take.
Access the full report for freeFAQ
Is this app good for checking a used iPhone's GPS?
How does this compare to MilGPS for professional use?
Does it work on the latest iPhone models?
Can I use this app without an internet connection?
Report last updated