Public transport: tap to pay same cost as official apps?

Believe it or not, in Copenhagen some apps give discounts on rides at certain times. I was looking at how to pay for public transport in Barcelona and found out the rest tap to pay (so, via card or phone wallet). I was wondering if this costs the same as using apps like t-mobilitat or TMB (both rated 1-2/5 stars in googke play store, which hints I should avoid them)