SailSpeed vs NaviLog

App for tracking sailing speed and direction, but also the wind. It has a display optimized for outdoor use. When you participate in a sailing race you can use the start timer. The timer can be adjusted to the wishes and needs of the user. It shows speed and heading and keeps track of race. If tracking is started it monitors the average speed, maximum speed, elapsed time and the distance covered. Wind direction is shown in a wind rose (subscripton required). App can make direct connection with a OpenWind BlueTooth sensor (subscripton required). In that case AWA, AWS, TWA and TWS is displayed in the app. It also has the ability to show a map and tracks the route in an overlay when map is selected and race is started. In setup menu landscape can be selected, the display will rotates accordingly, rearranging the speed or map and the heading for optimal visibility during the sail race. In the settings menu the user can select the units, and the scale of the map during the race tracking. Simply place your phone a a water tight casing on board of your boat, setup your settings and press start. The app will automatically keep tracking your progress, showing current speed and heading. Enjoy your sailing, optimize your speed during the race and analyze your data afterwards.

NaviLog — The Digital Logbook for Skippers NaviLog turns your phone into a complete sailing logbook: automatic GPS track recording, a physics-based anchor alarm, one-tap man-overboard marking and a barometric storm warning — all working 100% offline and without an account. Your logbook belongs to you: it is stored locally on your device, not in someone else's cloud. AUTOMATIC GPS TRIP LOGGING • Start a trip and NaviLog records your route in the background — screen off, no internet needed • Distance in nautical miles or kilometers, duration, average and maximum speed • Smart GPS filtering removes outliers for clean, accurate tracks • Notes, weather and crew for every leg of your voyage • Engine hours counter per trip and per yacht ANCHOR ALARM (ANCHOR WATCH) • Physics-based swing circle calculated from chain length, water depth, bow height and boat length — not just a plain radius • Supports tide, mooring type and even a second anchor • Pre-alarm, GPS-loss alarm and low-battery warning • Adjust anchor position and chain length while the watch stays armed • Wind and swing history recorded for every anchorage MAN OVERBOARD (MOB) • One tap marks the position instantly and guides you back with live bearing and distance • Works with or without an active trip recording WEATHER & STORM ALARM • Marine weather and wind forecast for your current position (online) • Pressure-drop storm warning from your phone's built-in barometer — works completely offline, far from any coverage SEA CHARTS & OFFLINE MAPS • OpenSeaMap seamark overlay: buoys, lights, fairways on the map • Download chart regions before you cast off and review your tracks offline (Pro) FOR SKIPPER & CREW • Crew, skipper and yacht profiles, official crew lists • Checklists with templates (departure, safety briefing, engine check …) • Sea-miles certificates for licence training and charter proof EXPORT & BACKUP (PRO) • Complete logbook and sea-miles certificate as PDF • Tracks as GPX for OpenCPN, chart plotters and other apps • CSV import/export of trips, crew, yachts and anchor history MADE FOR NIGHT WATCHES • Night-watch mode in red-on-black to protect your night vision • Dark mode, fully localized in English and German PRIVACY FIRST • No account, no ads, no tracking of your behaviour • Your logbook data is stored only on your device • Optional online features (weather, place names, map tiles) contact their services only when you use them WHO IS NAVILOG FOR? Sailors, skippers, charter crews, motorboaters and liveaboards — for coastal cruising, blue-water passages, regattas, sailing school and logging licence miles. If you have ever asked for the best free sailing logbook app with an anchor alarm that works offline, this is it. NaviLog is free as a full logbook with GPS tracking, anchor alarm and MOB. A single one-time purchase unlocks Pro (PDF/GPX/CSV export, crew lists, templates, offline chart download) — no subscription, ever. Note: NaviLog is a logbook and an aid to good seamanship — it does not replace official navigation equipment or safe anchoring practice.