It works pretty good, although not as good as I originally thought. You have to find certain spaces to scan your cards, because most other places don’t work, but once you find a working place, it does work really well. Another thing is that some cards are not there. Two examples would be the SM04 Pikachu Promo and the Sun and Moon Base Set Eevee Alternate, both from the Let’s Go Box. Another minor problem, not really though, more like a request, is to expand it to feature XY and BW sets, maybe even HGSS sets, kind of like TCG Online. Since XY Evolutions packs are still being sold in tins and boxes, and XY cards as a whole still being sold in most stores, expanding PokémonTCGCardDex to feature XY cards would be a good start and a good first update.
Overall, I’d say that this has potential to be a really good app, but right now, I would say it’s mediocre and definitely needs some patch ups and other things I can’t list here because it would be too long.