Yes this is what I would suggest. As a new XC pilot using XCsoar originally, and now Top Hat now, I think it is the best way to start using a moving map glide computer. Because I was initially able to bring my phone home and mess with XCSoar while not in the glider (or even at the airport) it made learning how to read and use a moving map/glide computer much much easier. An older Samsung phone (galaxy 5,6,7,8,9 or Note 4,5,6,7,8,9) work great and are pretty cheep if you don't have one laying around already. The only thing I would say is that have someone experienced with XCSoar or TopHat configure them because the stock layout and settings are less then optimal.