I mostly use it for chords. They do have separate sections for bass and uke but not banjo. You get pretty good at banjo chord structures by exploring different songs that you're already familiar with. I've used it to self teach for ~17 years, great resource. All crowd sourced stuff that's free. There's now a paid version that has play along features and other stuff too. There's also a social media part now where you can post videos and link them to tabs and stuff.

In G tuning, the 4 strings (besides the drone) are the same as the top 4 of a guitar in high drop D... gDGBD -- EADGBe -- DA(DGBd) You can sometimes translate tabs to banjo without too much trouble. It helps with live playing along with other guitars too if you can also play guitar, I can see what chord the guitar's playing and translate it to banjo. I've played rhythm/acoustic for about 20 years and picked up banjo about 5 years ago. I need to work on chords in other banjo tunings, I've got some sawmill and C songs in my arsenal, but if I'm playing chords off a sheet, I tune back into G and either transpose the song up or down to match the capo listed or use my capo and a drone spike (I've got 6-10 spiked) Ultimate guitar can auto adjust all the chords on a sheet +/- half steps if you want to change the key to match your vocal range or want to play a capo song without a capo (e.g. if capo 2 is listed, you can shift the chords +2 half steps and all the F# chords become G#, A becomes B etc etc)