I primarily use XCSoar. Used to use SeeYou Mobile. Don't fly competition, but fly tasks and cross country a bit.

A few thoughts for XCSoar.

SETUP

-As others have said, make sure you have the correct waypoints file and airspace files loaded in "Site Files."
-make sure you have the correct polar loaded
-make sure you set a 1000 feet or more safety altitude
-in addition to the 1000' arrival altidue, you should have a way to set a safety glide. Some kind of polar degridation, bugs etc. Our club likes 3x distance to a landing spot with a 1000 foot safety altitude at arrival. One way you can do this is put something like 7.0 MC in "Safety MC" in the glide computer setup page. This will make the glide circle (smaller) around your glider to be roughly similar to this 3x glide rule of thumb. The nice thing about monitoring this landout or reach circle on the map is that it is wind and terrain aware.

Lastly, I would suggest also playing back your real flights in XCSoar. (menu choice config, config, replay) You can play with tasks and spend lots of time learing the program. Condor glider simulator is great for this too as XCSoar can be set up as if it's really flying.

These apps can't be TOO simple because soaring has a lot of complexity that's reflected in the apps. ... Aaron