Marine: Boat & more

Tip: Locus Map supports OpenSeaMap ("nautical variant" of OpenStreetMap). That way you not only have your "on water navigation", but "landmarks" as well! Same can be said for OsmAnd with the Nautical Charts plugin.

Avalon Offshore - Weather, Routing, Navigation (4.6@34; ~EUR 50.00) Ǥ 15
Polaris GPS Navigation: Hiking, Marine, Offroad (4.5@39,988) Ǥ 12 2
C-MAP - Marine Charts. GPS navigation for Boating (4.5@6,456) Ǥ 33 17 incl. offline maps
Marine Ways - Free Nautical Charts (4.5@1,459) Ǥ 8 2
Ski Map Plugin — OsmAnd (4.5@773) Ǥ 4 $Contains no trackers known to us \o/$ LastUpdate: 2016-12-27
Locus Map Free - Hiking GPS navigation and maps (4.4@46,424) Ǥ 24 7 / Locus Map Pro - Outdoor GPS navigation and maps (4.8@38,435; ~EUR 10.00) Ǥ 25 2 Vorstellung 3/2014; Video Tutorials for Beginners 2017; Izzy's Locus Ressourcen-Sammlung; Online & Offline; KML/KMZ/KMX Import (POIs/Routen/Bilder), GeoCaching, ANT+ Support
i-Boating:Marine Navigation Maps & Nautical Charts (4.4@8,050) Ǥ 13 1
OsmAnd API Demo (4.4@53) 0 $Contains no trackers known to us \o/$ LastUpdate: 2018-01-12 for developers: test integration with OsmAnd and functioning of the main features
Sailings (4.3@6) Ǥ 7 1
SailGrib Weather Routing Free (4.2@1,851) Ǥ 19 3 / Weather - Routing - Navigation (4.9@1,096; ~EUR 80.00) Ǥ 16 3
AvNav Navigation (4.2@82) 10 $Contains no trackers known to us \o/$ Sailboat Navigation
PathAway Outdoor Navigator (4.1@346) Ǥ 17 3 / PathAway LE - Outdoor GPS Nav (4@20; ~EUR 6.50) Ǥ 13 1 / PathAway Express - Outdoor GPS (3.7@49; ~EUR 20.00) Ǥ 13 1 Record tracks, capture points, create and follow routes, navigate with online maps. Intended for aviation, boating, off-road driving, hiking, cycling, touring, Geocaching, …
Boating Marine & Lakes (4@24,980) Ǥ 23 4
Nautical Charts — OsmAnd (4@2,046) 0 $Contains no trackers known to us \o/$ LastUpdate: 2016-12-27 Plugin for OsmAnd
OpenCPN (4@1,395) 10 3 LastUpdate: 2016-10-03 / OpenCPN (3.5@366; ~EUR 10.50) 10 1
AFTrack Sailing Edition (4@109) 16 $Contains no trackers known to us \o/$
WinGPS™ Marine (3.9@1,046) Ǥ 17 1
MX Mariner - Marine Charts (3.9@688; ~EUR 11.00) Ǥ 12 3
qtVlm Navigation and Weather Routing (3.9@204) Ǥ 14 $Contains no trackers known to us \o/$
Boat Beacon - AIS Navigation (3.9@22; ~EUR 16.00) Ǥ 13 3
Marine Navigator Lite (3.8@2,034) 3 $Contains no trackers known to us \o/$ LastUpdate: 2016-08-02 / Marine Navigator (3.8@475; ~EUR 8.25) Ǥ 6 $Contains no trackers known to us \o/$
Maritime World Ports (3.8@386) Ǥ 7 $Contains no trackers known to us \o/$ LastUpdate: 2016-08-29
KartenWerft NavGo (3.7@125) Ǥ 7 $Contains no trackers known to us \o/$ Vorstellung 2/2014; Test 2/2014; Karten kostenpflichtig erwerbbar (je ca. 40 Euro, nördliche Hälfte Deutschlands), Nutzung im Offline-Modus (ohne Netz); Navigation, tagesaktuelle RevierInformationen, Push-Meldungen bei wichtigen Ereignissen
Marine Navigation Lite (3.5@1,962) Ǥ 13 2 / Marine Navigation (3.6@366; ~EUR 14.00) Ǥ 12 2
SeaWi Marine (3.5@158) Ǥ 13 $Contains no trackers known to us \o/$
Boating Tides & Fishing GPS (3.4@86) Ǥ 10 3
i-Boating:Denmark Marine Maps (3.3@12; ~EUR 65.00) Ǥ 11 $Contains no trackers known to us \o/$ LastUpdate: 2016-07-09 many more maps etc. from this dev, see this list
Seapilot (2.9@624) Ǥ 15 7
SeaMapDroid (0@0) 4 $Contains no trackers known to us \o/$ Github

Boat log books

2021-03-31

Sail Expert - Navigation, Instruments, Logs & NMEA (4.5@336) Ǥ 25 3
Sailtracker (4.4@282) Ǥ 17 5 LastUpdate: 2017-11-20
Blue Boat Log - Explore and Track Boating Trips! (4.4@14) Ǥ 18 8
LD-Log FREE - GPS Logger & Travel Diary (4.3@211) 7 $Contains no trackers known to us \o/$ / LD-Log - GPS Tracker & Logbook (4.7@509; ~EUR 9.00) Ǥ 7 $Contains no trackers known to us \o/$ track, waypoints (auto/manual), and more
Mad Mutt Marine GPS Navigator (4@91) 4 $Contains no trackers known to us \o/$ LastUpdate: 2014-09-05 Waypoints, logs, anchor alarm
nke Display (3.8@30) Ǥ 11 3
Nebo - Boat Logging Made Easy. (3.5@242) Ǥ 17 8
MarineLoggerPlus (0@0; ~EUR 3.25) Ǥ 15

Anchor Alarms

2021-03-31

Anchor Watch / Alarm (4.4@1,001) Ǥ 9 4 / Anchor Watch Pro / Alarm (4.5@39; ~EUR 6.00) Ǥ 7 3
My Anchor Watch (4.4@181) 8 2
Anchor Alarm - SailGrib AA (4.2@133) Ǥ 13 3
Anchor watch / Geofence (4.2@6) 7 $Contains no trackers known to us \o/$ LastUpdate: 2014-10-18
Sailsafe. Anchor alarm. (4.1@211) 8 $Contains no trackers known to us \o/$ LastUpdate: 2019-04-04 / Sailsafe Pro. Anchor alarm. (4.3@86; ~EUR 5.00) Ǥ 9 $Contains no trackers known to us \o/$
Anchor Alert (4.1@43; ~EUR 13.00) Ǥ 9 $Contains no trackers known to us \o/$
Anchor watch (3.9@106) 3 $Contains no trackers known to us \o/$ LastUpdate: 2018-03-25
Anchor Watch (free) (3.6@67) 9 1 / Anchor Watch (3.9@22; ~EUR 3.00) 9 1 LastUpdate: 2019-06-14

Regatta & Races

2021-03-31

Sailing Tack-Tastic (4.8@12) 3 $Contains no trackers known to us \o/$
The Fast Track GPS Tool (4.4@934) Ǥ 10 $Contains no trackers known to us \o/$ LastUpdate: 2016-08-26
Race Sailing Tack Optimizer Free Edition (4.3@30) 3 2 LastUpdate: 2017-02-03 / Race Sailing Tack Optimizer Pro Edition (4.5@4; ~EUR 3.25) 3
Sail Racer (4.2@256) Ǥ 15 4
Sailware (Sailboat Racing) (4.1@18) Ǥ 12 3
Regatta basic & start timer (3.9@66) 5 1 LastUpdate: 2017-03-01

Wind, Weather, & Tide

2021-03-31

Windfinder: Wind forecast, Weather, Tides & Waves (4.6@35,085) Ǥ 9 5 / Windfinder Pro - weather & wind forecast (4.7@8,104; ~EUR 9.00) Ǥ 9 1 Wind, waves, weather & tides worldwide
Windy.app: precise local wind & weather forecast (4.5@71,498) Ǥ 20 15
My Tide Times - Tide Tables, Forecasts & Tides! (4.5@11,622) Ǥ 14 14 / My Tide Times Pro - Tables, Forecasts & Charts! (4.6@774; ~EUR 2.00) Ǥ 12 $Contains no trackers known to us \o/$
Météo Marine (4.4@15,965) Ǥ 13 16 coastal forecast for France and Europe
Wisuki (4.4@6,114) Ǥ 13 7 Vorstellung 5/2014
SailGrib Weather Routing Free (4.2@1,851) Ǥ 19 3 / Weather - Routing - Navigation (4.9@1,096; ~EUR 80.00) Ǥ 16 3
SailFlow: Windy Conditions & Forecasts (4.1@642) Ǥ 11 4
Tide Prediction (4@2,362) 3 1
Marine Wind Calculator (4@140) 0 $Contains no trackers known to us \o/$ LastUpdate: 2017-08-21
Tidal Chronoscope (3.8@424) Ǥ 5 $Contains no trackers known to us \o/$ LastUpdate: 2016-12-16
MX Tides (3.3@59) 4 $Contains no trackers known to us \o/$ Github

Preparation & tests for boat licenses

2021-03-31

SBF Trainer Binnen Free (5@1) 2 2 LastUpdate: 2017-08-22 / SBF Trainer See Free (4.3@6) 2 2 LastUpdate: 2019-01-10
SBF Binnen, SBF See, BSP, SRC, UBI und FKN (4.9@3,906) Ǥ 5 $Contains no trackers known to us \o/$
SKS Sportküstenschifferschein Trainer Free (4.7@19) 2 2 LastUpdate: 2018-12-30
SBF SKS Sportbootführerschein (4.6@72; ~EUR 0.75) 1 $Contains no trackers known to us \o/$
SBF-Binnen 2021 (4.6@23) Ǥ 5 3
Bootstheorie SBF Binnen (Motorboot & Segelschein) (4.6@19; ~EUR 6.50) Ǥ 5 $Contains no trackers known to us \o/$ LastUpdate: 2017-09-06 / Bootstheorie SBF See (Motorboot & Segelboot) (4.5@26; ~EUR 6.50) Ǥ 5 LastUpdate: 2017-09-06
SBF-Fragen | See, Binnen, Funk (4.3@420) Ǥ 2 5
Bodenseeschifferpatent-Trainer (4.2@70; ~EUR 5.00) Ǥ 3 $Contains no trackers known to us \o/$ LastUpdate: 2018-07-03
SBF-Teacher (4.1@94) 0 $Contains no trackers known to us \o/$ LastUpdate: 2015-01-19
Wassersport einfach lernen (3.9@16) 6 $Contains no trackers known to us \o/$
SBF Binnen & See 2020 (3.8@20; ~EUR 4.75) 0 $Contains no trackers known to us \o/$ LastUpdate: 2016-09-12
Bootsscheine (1@1) Ǥ 9 $Contains no trackers known to us \o/$

Maritime reference books & manuals

2021-03-31

Mariners’ Glossary (4.8@98) 4 4 LastUpdate: 2019-07-25
Skipper Directory (4.7@380) Ǥ 4 5
Marinus ColRegs Lite (4.6@2,057) Ǥ 8 3 LastUpdate: 2018-09-14 / Marinus - Boating rules (4.6@517; ~EUR 20.00) Ǥ 7 1 LastUpdate: 2016-08-22
Animated Knots by Grog (4.6@1,291; ~EUR 5.50) 3 1
Maritime Dictionary (4.6@735) Ǥ 7 2
cMate (ColReg, IALA, ICS, SOLAS, LSA, IMO symbols) (4.6@505) 5 $Contains no trackers known to us \o/$
Nautical Flags Helper (4.6@198) 3 3 LastUpdate: 2018-12-26
Vessel Lights (4.5@1,881) 0 $Contains no trackers known to us \o/$
Nautical Flags (4.5@353) 2 1 LastUpdate: 2018-03-09
Useful Knots - Tying Guide (4.4@5,754) Ǥ 5 3
Seabook (4.4@4,966) 4 $Contains no trackers known to us \o/$
Sea knot (4.4@1,735) Ǥ 5 4
Sea Sector – Maritime Courses for Sailors (4.4@1,237) Ǥ 12 7
Future Seafarer (4.4@64) 8 4 LastUpdate: 2017-10-15
Dictionary of Marine Terms (4.3@2,216) 4 1
IALA Buoy Trainer (4.3@13; ~EUR 1.25) 0 $Contains no trackers known to us \o/$
Rules Of the Road (4.2@1,245) 2 $Contains no trackers known to us \o/$ LastUpdate: 2015-03-12 quick reference of rules, signals, and more
Knots — How to Tie Lite (4.2@499) Ǥ 8 4 LastUpdate: 2017-03-31
Safe Skipper Essential Boating Safety (4@99) 9 $Contains no trackers known to us \o/$ LastUpdate: 2017-04-06 / Safe Skipper - Boating Safety (4.3@59) 3 $Contains no trackers known to us \o/$ LastUpdate: 2016-07-01
ColRegs: Navigation Lights & Shapes (4@67; ~EUR 2.75) 1 $Contains no trackers known to us \o/$ LastUpdate: 2019-04-15
SRC Companion Free (3.5@17) 3 3 LastUpdate: 2018-11-10 / SRC Companion Pro (3.5@4; ~EUR 1.00) 1 $Contains no trackers known to us \o/$ LastUpdate: 2019-05-29

Other maritime apps

2021-03-31

Driving license inland 2017 (4.9@714) 0 $Contains no trackers known to us \o/$ Sportboot-Führerschein für Binnengewässer
SeaHelp (4.9@711) Ǥ 11 10 breakdown service at sea; Croatia, Slovenia, Northern Italy and the Balearic Islands
GetMyBoat: Boat Rentals & Experiences (4.9@465) Ǥ 17 6
Nautical Almanac (4.8@1,001) Ǥ 3 $Contains no trackers known to us \o/$
iBoatCharter (4.7@97) Ǥ 12 6 LastUpdate: 2016-04-02 Adria
Fishing Points: GPS, Tides & Fishing Forecast (4.5@69,619) Ǥ 16 13
SailDroid (4.4@1,965) 7 2
Salvamento Marítimo SafeTrx (4.4@111) Ǥ 16 4 kind of I.C.E. for sailors;
Sentinel - your boat, online (4.4@44) Ǥ 22 5 advanced control module for your boat
LookMarina- book your berth (4.2@35) Ǥ 10 7
Boat Calculator (4.1@82) 2 1 LastUpdate: 2015-05-19 maritime calculator, converter, and more;
WatchMate (4.1@46) 8 2
Mast Tuner (4.1@9) 3 1 Sail away...
Nautical Calculator (3.9@596) Ǥ 12 3 / Nautical Calculator Pro (4.7@183; ~EUR 7.50) Ǥ 9 1
easyAIS (3.8@203) 3 $Contains no trackers known to us \o/$
Boating Trip Planner (3.6@12; ~EUR 1.00) Ǥ 4 $Contains no trackers known to us \o/$ LastUpdate: 2016-02-15
Mooringo (3.5@42) Ǥ 11 6
Wind Speed (3.2@569) Ǥ 14 3 converter: Beaufort, km/h, mph, kn, m/s, ft/s
Ships - Receive AIS data from air (3.2@95) Ǥ 15 4 Github
canua - für alle Paddler (2.4@147) 11 $Contains no trackers known to us \o/$ Vorstellung 4/2019 | 5/2019

Further Readings:

Rubrik Navigation
Skipperguide Wiki: Liste nautischer Software
Skipperguide: Android Tools vorgestellt
OpenSeaMap - die freie Seekarte
Best Sailing and Boating Apps (7/2018)
Segel-Apps für Ihr Mobiltelefon, Smartphone und Tablet (8/2013 - 8/2020)

2021-03-31

IzzyOnDroid

Maritime Navigation

Boat log books

Anchor Alarms

Regatta & Races

Wind, Weather, & Tide

Preparation & tests for boat licenses

Maritime reference books & manuals

Other maritime apps