Ok, coming from SoundGym I was like OK, a bit of music training is cool. These exercises are terribly thought through for a beginner. Like if you are still learning intervals and a game asks you to memorize a sequence and repeat the notes with only one chance at hearing it, that’s kinda rigid and makes it no fun.
I would quibble a bit with what Dima says about the melody games. In my experience, Melody Hunter DOES give you practical, singable melodies to work with (heck, some of the levels even use well-known melodies like When the Saints Go Marching In). It's Melody Jay and Melodix that do not. Neither of those are in my rotation. I did make some progress on Melodix before Melody Hunter came out, but took it out of my rotation soon thereafter.
But I absolutely agree that a consistent workout on this site only works if done in concert with a full, consistent musical practice of playing and/or composing music.