I might be a little off-topic, but if you have a Mac and GarageBand (which is free for Mac users) -- Garageband comes with "smart loops". You create a track, drop in a drum loop, a bass loop, a rhythm guitar loop.... if you use an Arrangement Track and label each section of the song "Intro", "Verse" or "Chorus", etc. -- the smart loops will auto-configure themselves to fit that section of the song.. adding fills and "flourish" automatically, at the boundaries of each section. You can change the key, time signature, and tempo... smart loops will auto-adjust to whatever you select.
No I don't have a Mac but I do have GarageBand on my phone but don't care for it. I bought a Boss RC-1 looper so that's all I need for now. Thanks for the reply.
I've heard great things about GarageBand. I don't use apps on my ancient phone. It makes phone calls and texts and takes pictures and I'm happy it does that. I have two Windows 10 computer but no Mac. Why is there not a GarageBand made for PCs? Also why is there not some kind of third-party software clone for the PC?