A camera sextant, for the fun of it. Noon, a clean horizon, and an hour on watch. Rainbow’s Arc takes a sun sight from a photograph: the sun and the sea horizon in one frame, worked against a built-in almanac into a line of position, and two lines into a fix. If you own a sextant, its drill scores your sights against where you really are. Every boat carries GPS these days, usually several. This app is not a contingency plan for the day they all fail at once — though it would serve. It is a…
Competitors
Full chartTop of Paid · Navigation in United States. Rainbow's Arc Positioning isn't in it right now. Changes are over 7 days.
- #1 (number one)No change
MilGPSCascode Labs Pty Ltd - #2No change
Solocator - GPS Field CameraCivi Corp - #3Up 2 places
Land Nav AssistantGammon Applications, LLC - #4No change
Blitzer.de PROEifrig Media - #5Down 2 places
- #6No change
Sporty's E6B Flight ComputerSporty's Pilot Shop - #7No change
TheodoliteCraig Hunter - #8Up 3 places
TACNAV-X: Military NavigationTacNav Systems LLC - #9Up 3 places
aprs.fiGainIO - #10Up 14 places
NavRulesMintaka Innovations - #11Up 7 places
Exit Strategy NYC Subway MapJWeg Ventures LLC - #12Up 3 places
Find93Paul Kragthorpe - #13Change unknown
EZ SextantThird Reef Software LLC - #14Change unknown
NZ Topo50 South IslandRight Place Resources - #15Down 7 places
Speedometer 55 Pro. GPS kit.Stanislav Dvoychenko - #16Up 11 places
MilGPS PROmustafa pistofoglu - #17Down 7 places
Holding Pattern TrainerFLEMINGER MEDIA LLC - #18Up 1 place
Cachly - GeocachingZed Said Studio LLC - #19Up 12 places
Route 66 Centennial GuidePoul David Rasmussen - #20Up 2 places
Range Finder ToolNatalia Gavrylova
Store listing
How the app presents itself on the App Store. Select a screenshot to open it full size.
What's new
Version 1.0.1 · 4 Oct 2026 · 12 days ago
Version 1.0.1 starts from where you are. - A new install asks for your starting point: type a position you trust, or read the GPS aboard once. - Practice runs in a voyage of its own and hands yours back when you’re done. It leaves your height of eye alone. - Every reading shows its age: the GPS check, the leg you’re on, the set and drift, and the drill’s mark. - Save a fix to the log without moving the reckoning to it. - The drill remembers your index correction, and when you entered it. - Height of eye takes decimals, and New sun sight opens the camera directly. - Turn the camera or location off and the app says so, with Open Settings one tap away.
Current rankings
Every chart this app is in right now, best position first.
Not charting right now
This app isn't in any tracked top 100 at the moment. Its history below shows when it was.
Rank history
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No chart history to show
History appears for charts the app is currently in.
Ranking events
Entries, big moves, #1s and new versions we've recorded.
- Entered the Paid · Navigation chart at #92United States
More from Rainbow's End Marine, LLC
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|---|---|---|---|
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