Practice Hub's Loops tile actually holds two tools — a backing-track library to jam over, and a slower, more surgical trainer for isolating one hard passage until you've got it.
Practice Hub's Loops tile holds two different tools, and it's worth keeping them separate in your head. One is a library of backing tracks you drop into and jam over, no prep required — pick a groove, plug in, play. The other, surfaced as its own featured card inside that same tile, is a slower and more surgical tool: grab one hard passage and slow it down until your fingers catch up. Same neighborhood, different purpose.
The Loops tile opens on a catalog of bundled backing-track loops — blues, jazz, rock, funk, and more. Pick one and it starts playing immediately, looping continuously so you can solo or comp over it for as long as you want. Adjust the key and tempo to fit what you're working on, then just play. A "now looping" mini-player stays pinned while you keep browsing the rest of the list, so switching from a blues shuffle to a funk groove doesn't mean stopping, backing out, and starting over.

Once you've dialed in a key, tempo, and feel you like, save it as a named setup of your own — separate from the bundled defaults, one tap to recall later. Useful if you keep coming back to the same backing track at the same slowed-down tempo to work on the same solo; there's no reason to re-adjust it every time.
Hit record while a loop is playing and your take gets saved right there, playable later from the loop's entry in the list. Good for hearing back a solo you improvised, or just checking whether what you played actually locked in with the groove.

Loop Trainer is a different tool from the library above, though it shares a home. It isolates one specific stretch of music — a lick, a chord change, a fill — and slows it down without dropping the pitch, so you can hear it clearly at a speed your hands can actually keep up with. It works from three sources:

For imported files, Loop Trainer also runs an automatic "what chords is this" sketch.
that chord sketch runs offline, on your device — no upload, no waiting on a server. It's also a best guess, not a verified transcription. Treat it as a starting point for figuring out a song, not the final answer.