iGlide Advanced vs igc Viewer

NaviLogic iGlide - the Soaring Navigation app for iOS iGlide is a soaring navigation App with advanced functionality that is amazingly easy to use. iGlide supports glider pilots during a competition, a cross-country flight, or just during short recreational flights. iGlide comes in three editions at three price-points. Starting with "iGlide lite" and "iGlide advanced" up to "iGlide pro". All apps can be upgraded later-on by paying the price difference in an in-app-purchase. Features of iGlide lite: - Simple and easy to use Direct-To function to a single waypoint. - Easy to read, high-resolution terrain map with detailed topographical features. - Free daily updates for aviation data such as airspaces, airfields, and navaids. - Final glide calculator with Ballast, Bugs, MacCready, and aircraft polar data. - Profile view showing terrain and airspace en route. - Vertical airspace overview and airspace warnings - Free airport and airspace-database with free updates - Flight-statistics with logbook - Traffic is displayed on the map if an appropriate data source is connected (FLARM, AIR TRAFFIC or similar). - Visual and voice traffic warnings, if an appropriate data source is connected. - Many display options individually configurable. - Flight-logging (IGC and KML format). - Live tracking on different servers (livetrack24, skylines, sky-mobile). - Track-Line showing the preceding flightpath on the map. - Data import for all common data formats (CUP/DAT/OpenAir/PLR etc.) - Live METAR weather data for selected airports. Additional features in iGlide advanced: - Route planning over any number of waypoints. - Directly upload flight logs to OLC (www.onlinecontest.org) or send via eMail. - Rubberband function for quick and easy route manipulation. - Accurate wind calculation. Additional features in iGlide pro: - Calculation and optimization of the current OLC scoring distance. - Extensive route planning with turn areas, assigned areas and implementation of FAI Rules (e.g. finish circle). - FAI triangle optimization. - Comprehensive in-flight statistics functions. - Final glide calculation over terrain. - Live and super-easy AAT optimization. - Thermal Climb Optimizer. 
IMPORTANT SYSTEM REQUIREMENTS: iOS 13 or newer. Devices running older versions are not supported.

How to use. - Open File App. (Alternatively, click the share button and open with 'copy to igc viewer') - Select [.igc] file. - The app will open igc file (it might take a few seconds depending on the file size).