Parent-managed LEGO collection browsing

WhichBrick

Know what you can build next. WhichBrick helps families turn a bin of bricks into sets, parts, favorites, and build ideas kids can actually use.

Coming to the App Store How it works

Launch preview note: the final App Store link will replace this coming-soon button when the listing is live.

A warm family building table with sorted toy bricks, trays, hands, and a partially built model.
Your sets
Synced
Tree House 812 pieces ยท 94% ready
Favorites Photos, notes, and build ideas

Your collection at a glance

Sets, parts, MOCs, and favorites in one calm place.

WhichBrick keeps the browsing surface simple: big images, simple tabs, and quick favorites for the things your family comes back to most.

Sets 42
Parts 6k+
Favorites 18

Find what can be built

Move from "do we have it?" to "let's build it."

Browse owned sets, compare parts, and keep build ideas close so a sorting session can turn into a real project.

Space rover alternate Missing 2 common pieces
Close
Mini market stand Ready from owned parts
Ready
Favorite photo note "Try the blue roof next"
Saved

Made for a family setup

A parent-managed account with kid-friendly browsing.

A parent or guardian signs in with Apple or Google. The browsing experience stays picture-forward and easy to tap, with no in-app ads and no behavioral tracking in the launch version.

Sorted toy bricks and a partially built model on a family table.

Cloud sync and subscription

Start small, then unlock the full collection.

The free tier keeps up to 3 unique sets accessible. A subscription unlocks unlimited sets and cloud sync so the family's saved collection can follow the parent account across devices.

  • Free tier: 3 unique sets for trying the app with a real collection.
  • Subscription: unlimited sets and cloud sync for the parent-managed account.
  • Purchases and subscription management run through Apple. Restore purchases is available in the app.

Privacy-light by default

Built for App Store review and parent review.

Parent-managed The account holder is the parent or guardian.
Apple or Google sign-in Supabase handles authentication for the app.
Account deletion Delete account and cloud data from Settings in the app.
No in-app ads No in-app advertising and no tracking across apps or websites.