WhichBrick
Made for builders.
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
WhichBrick is a friendly brick-building companion for kids and families. Add the sets you own, browse big photos, tap into parts, and quickly answer the question that always comes up during a build: which brick do we need?
Made for young builders, WhichBrick keeps things simple: large tap targets, visual browsing, minimal text, and parent-managed sign-in. Kids can explore their sets, search for parts, meet the minifigures from their sets, star favorites, and save notes without digging through a grown-up collection spreadsheet.
When a piece goes missing, WhichBrick helps you look across your collection to see where that part appears in other sets. It is a practical way to rescue a build without dumping every bin on the floor.
WhichBrick also helps turn the sets you already have into new ideas. From a selected set, find available alternate builds and MOCs, then save favorites for later. The app uses Rebrickable catalog data so your collection stays useful, searchable, and fun to explore.
Features:
- Add sets by set number or search
- Browse owned sets with clear images
- See each set's parts grouped by color
- Search parts across your collection
- Find which sets contain a part
- Browse the minifigures in your sets
- Filter by theme, set, color, and more
- Discover alternate builds and MOCs
- Star favorite sets, parts, minifigures, and builds
- Add notes to favorites
- Sync your collection across devices
Every feature is free for up to 10 sets. A subscription lets you add more than 10 sets.
WhichBrick is for kids, but a parent or guardian sets up and manages the account.
WhichBrick is not affiliated with or endorsed by the LEGO Group.
WhichBrick offers an auto-renewable subscription: $1.99/month (or $14.99/year), or a one-time $39.99 Lifetime purchase, each unlocking unlimited sets. Payment is charged to your Apple ID; a subscription auto-renews unless canceled at least 24 hours before the period ends.
WhichBrick Privacy Policy: https://whichbrick.app/privacy/
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
- Anonymous usage analytics: WhichBrick now counts which screens are opened, so we can see what families use most and improve those parts first. This never includes your account, your searches, or your sets, and it is not used for ads or tracking. The privacy policy in Settings describes exactly what is collected.
- Updated privacy policy.
The developer, Bright Slouch LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Purchases
- Contact Info
- User Content
- Identifiers
- Other Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Location
- User Content
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Bright Slouch LLC
- Size
- 58.5 MB
- Category
- Lifestyle
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPad
Requires iPadOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Lifetime $39.99
- Yearly $14.99
- Monthly $1.99
- Copyright
- © 2026 WhichBrick
