GridCollector v3 is out today. Looking back, nearly all of the effort in v2 went into the plumbing, because rearranging how an app fits together means moving everyone’s collections with it, and that took most of the month. The app worked better afterwards, but it looked much the same, and our black and gold had started to feel like the safe answer to “make it premium” rather than something with any life in it. People liked what it did, but I don’t think they loved using it, and in a consumer app getting the function right is really just the minimum.
What’s new in v3:
- The cards bring the colour. We kept the black and gold, but the colour now comes from the cards themselves: real card pictures on a growing number of cards, every card framed in the colour of its variant, and a lot more motion, including a little celebration when you tick cards off. After a month of data migration last time, watching the app come to life screen by screen was a lot of fun.
- Spotted finds the cards. Collectors are always on the lookout for cards, so when you add one to your hunt, the app now shows active listings for it from eBay and verified sellers. It’s there purely to be useful, as one more way to find what you’re chasing.
- Matching is the hard part. Anyone can list a card on eBay however they like, so working out exactly which card and variant a listing is turned out to be quite tricky. A title with “Formula 1” in it kept getting matched to card number 1, and a “Green Refractor /99” could be any of three different greens. So we wrote the bar down before the first round: at least 95% of the listings we show have to be the right card. Each round, we pulled a fresh random sample of 200 matches, marked every one right or wrong by hand, then fixed whatever the wrong ones had in common before starting again on a new sample. The first round got 178 of 200 right and the second 184, so closer, but still short of the 190 we needed.
- AI takes over the marking. Two hundred listings is too small a sample to tell 95% from 93%. So once we had two rounds of our own marks, we used them as an answer key to test an AI marker, and once it cleared the bar, agreeing with us 97% of the time on the ones it was sure about, we handed the marking over. Now it marks the clear-cut listings itself, sends the unsure or tricky ones to us, and we spot-check some of its easy calls each round to make sure it’s still doing its job.
The app finally feels like it has a bit of the spirit of the hobby in it. Let’s see whether the collectors like it.















