qtVlm vs Compass Toolkit

qtVlm is a navigation software for Sailing Boats. The application has a free version with basic features and a full version available through in-app purchase. The free version of qtVlm is a full grib viewer displaying all types of gribs and providing many advanced grib functions. It supports basics charts and some simple instruments. It includes also an Anchor Alarm module, a viewer for shapefiles, for instance those coming from SHOM, and can be configured to receive boat position either from internal GPS or from an external NMEA source connected through tcp, udp or gpsd. The full version adds many functions and features: - Weather routing and route modules, - A complete set of navigation Instruments, - Charts modules for Raster charts, Vector charts (S57, S63 and CM93) and mbtiles, - Support for Harmonic files (tides and currents), - Iridium GO! communication - AIS, - Start line mode, - Access to Great Circle gribs, qtVlm can also be used in Simulation Mode, which allows you to simulate a navigation through our server. This is the best way to learn using qtVlm. Once activated the full version will be available on all your iOS devices.

Compass Toolkit puts a whole outdoor navigation kit in one beautifully crafted app. At its heart is a stunning brass-amber marine compass — a real, gorgeously rendered instrument that shows heading, cardinal points and true vs magnetic north, so orienting yourself feels like holding a fine piece of gear rather than reading a flat dial. Around it sits everything an explorer needs: precise GPS coordinates in DMS, decimal or UTM you can copy and share; live altitude and barometric pressure; a digital bubble level for setting up a tripod, hanging a shelf at camp or checking a slope; sun and moon rise and set times with golden-hour and blue-hour windows for photographers; and waypoints you can drop, name and see together on a map. When you find somewhere worth remembering, a share-location card turns your spot into a clean, sendable snapshot. Compass Toolkit works offline — the compass, coordinates, altitude, level and sun & moon calculations all run entirely on your device with no signal needed; only the waypoint map loads Apple map tiles when you happen to have a connection. It is 100% on-device with no account and no tracking: your data stays on your device and is never uploaded to us or anyone else. Native and universal, it's designed to feel just as at home on iPad as on iPhone. FEATURES • A stunning brass-amber marine compass — heading, cardinal points, true vs magnetic north • Precise GPS coordinates in DMS, decimal or UTM — copy and share in a tap • Live altitude and barometric pressure • A precise digital bubble level for tripods, shelves and slopes • Sun and moon rise-set times with golden-hour and blue-hour windows • Waypoints you can drop, name and see together on a map • A clean share-location card to send where you are • Works offline, no account, no tracking — your data stays on your device Start free with the compass and coordinates, then a single $4.99 purchase unlocks altitude, the bubble level, sun & moon times, waypoints and the share-location card — one time, no subscription, ever.