I was painting my nails fairly regularly because they peel so fucking bad. My doctor suggested materna because of some vitamins or whatever, and I know there are "hair and nail" pills. I found that when I used a base coat, the nail polish would just all come off in one chunk, instead of chipping.
I tried I think it was a sally hansen nail oil or whatever that you put on like nail polish and like massaged into the nail? i don't know if it helped, but it was a bright green bottle and i didn't mind doing it.
honestly the absolute best thing that's worked for me was getting shellac polish because it's stronger and doesn't chip as easily. BUT, depending on funds that can be difficult.