Hm, I don’t know how experienced you are with composing, but creating (good, internally consistent, and exciting) chord progressions is not THAT easy. Sure, you could say I want a I-V-VI-IV chord progression, but then you’d have to work on the voicings to make it sound “good”, and then perhaps some rhythmic variations and/or arpeggiation… And, is it going to be the same voicings all the time? And what if I want to get away from purely diatonic chord progressions? And how about chord substitutions to add even more variety/spice??
I think this is where a software can come in and help… Not sure whether that is exactly what Chordify does, but it could be… 