After playing since Early Access and getting tired of waiting for official tools from the devs, here's my DJMAX Tracker.

It doesn't interact with the game at all, it only reads the screen, so there's no problem with the anti-cheat.
Analyzes songs from the song select screen (optional) and the result screen (no need to stay on it)
Saves everything to a database, so you get lots of data :D (I love numbers... and I really need to see where I can improve)
Lets you mark songs you want to train
Vertical/horizontal layout, fully rearrangeable
Webcam, key viewer and notes widgets included

If you want to see it in action : https://www.twitch.tv/videos/2903304796?t=01h07m00s

I originally just made it for myself, but I could clean it up and share it if people are actually interested ^^'