Garmin Training Center is described as 'Track and analyze your fitness activities with Garmin Training Center. Use it to review activity history as well as create workouts and send them to your Garmin fitness device' and is an app in the sport & health category. There are seven alternatives to Garmin Training Center for a variety of platforms, including Mac, Windows, Linux, Web-based and Android apps. The best Garmin Training Center alternative is Turtle Sport, which is both free and Open Source. Other great apps like Garmin Training Center are Garmin Connect, Golden Cheetah, Runalyze and rubiTrack.
I try different software on the same computer . Turtle Sport work great and i have accurate data - perfect tools (software) for garmin 705. Very easy to use. Free.