📈Last 7 days0 installs — 100% slower than the week before (+3) · 0/day since Oct 7
🏆Among Maps & Navigation apps bottom 0% by installs gained this week (202 peers growing)
🛠Updatesactively updated · updated 22 days ago · every ~7 days (2 updates tracked)
Installs since launch
+4 installs
since Oct 7
Update history
2.3Oct 23, 2026
Coast Guard Exams: restored the illustrations on about 190 engineering, electrical and refrigeration questions, removed questions with errors found in a full audit of the question bank, and corrected several explanations. Your test history and bookmarks are kept.
2.2.2Oct 16, 2026
v2.2.2<br>- GMDSS: restricted license (Element 7R) questions now show the full FCC answer text; some answers were cut off<br>- GMDSS: corrected the answer to one Element 6 question (6A78) and refreshed the explanations<br>- Your bookmarks and progress are kept
Mariner Studio is a maps & navigation app by Osprey Applications LLC with 1,000+ downloads (about 1.3K estimated). Released Feb 1, 2025. Install growth, rank history, SDKs and ad networks.
From the store listing: “Nautical charts, USCG exam prep, GMDSS training, AIS tracking & marine weather”
