To strike a contentious note...
You already have the best software - your brain.

Take any piece you know well, play it in your mind and slow it down - its easy

take a piece you are working on, perhaps from a recording, play a few bars. Stop the recdording and paly it back in your mind, but slower. Its easy, and there are no pitch effects.

Good news is you can take your equipment most places your instrument goes, I say most, because my mind desrets me sometimes


Win 11 64, Asus Rog Strix z390 mobo, 64 gig RAM, 8700k