Completed sets, together
On the home screen, a complete set leaves “In progress” for the “Completed sets” section just below, with its completion date. Uncheck a piece and it returns to “In progress”.
Rebuilding your incomplete LEGO® sets
BrickBack
BrickBack identifies a LEGO® brick in a photo and tells you which sets it is missing from.
Free unlimited scanning, over 28,000 sets in the catalog, no account to create. On iPhone.
- iPad Not available
- Android Not available
Available on the App Store Free · Unlimited scanning · No account
1piece found, one step closer to a complete set
Pieces to buyYour list stays up to date
Offline catalogOver 28,000 sets on the iPhone
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A LEGO® brick in your hand, and you know what to do with it
Find a brick in your bin, scan it, then mark it as found for a set that needs it. You see the set's progress and how many pieces are still missing.
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Find out which set your next brick is missing from
Free download, unlimited scanning, no account to create. On iPhone.
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Over 28,000 LEGO® sets in your pocket
The catalog is downloaded on first launch. After that, your collection, your set contents and your missing pieces can be browsed with no connection. Scanning, catalog updates, new-set prices and price alerts need a connection.
28,000+sets in the catalog
64,000+different pieces in the catalog
270+colors listed
11languages
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Your LEGO® set fills up, 10% at a time
Each set's progress is shown in ten 10% steps: each one fills with the pieces you find, at 10%, 20%, 30%… When the tenth is filled, the set is complete.
Progress
10%20%30%40%50%60%70%80%90%100%
Completed on September 25, 2026
- Every piece you check off fills its step.
Its thumbnail appears: the step fills with the pieces you have actually found.
- Every 10%, another step is filled.
At 10%, 20%, 30%… it is full, labeled with its percentage, and the next one begins.
- At 100%, the set is complete.
Its framed photo grows, with a dated “Complete” label. The date also appears under the count.
The price, where it is true
A set's pieces open in the manufacturer's single-piece shop; Pro also turns the missing ones into a list in BrickLink format, to copy and import yourself. The price that counts is theirs: BrickBack takes you there, it does not make one up.
What it does not do
It does not tell you what your collection is worth, never presents a set as a financial operation, and sells nothing. It counts pieces.
Finish the LEGO® sets waiting at the bottom of the tub
Track 2 sets for free, with no time limit, and watch them fill up 10% at a time.
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BrickBack starts on iPhone
iPad and Android are not available, and no date is announced for them.
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iPhoneAvailable
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iPadNot available
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AndroidNot available
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Scanning is free, and will never be metered
What the free version limits: the number of sets and of pieces in your loose bricks, counted once and for all. Never the scanning.
Collection · Bricks · Scan · Ideas · To buy. Open Settings from ⚙ in Collection.
Free
- Unlimited piece scanning: one photo per piece, with the camera open from one piece to the next
- 2 sets in total, counted once and for all: removing a set does not free its place; adding a counted set again costs nothing
- Missing pieces and progress for your sets
- “Pieces to buy”: one list across your sets, always up to date. Group by set, color or piece type, exclude pieces already in your loose bricks, and export to Rebrickable or a spreadsheet for free
- “Search for a piece” by name, number or color, without scanning, then mark it as found for a set or add it to your loose bricks
- “Where is this piece from?”: sets that contain it, yours first, then others with theme and year filters. The app cannot know which set your piece came from
- “Scan a box”: read the printed set number on your iPhone, without sending a photo, to add the set
- My loose bricks: 30 different pieces, counted once and for all; removing a piece does not free a place
- From 20 loose pieces, the first 3 LEGO® sets you may have pieces for
- Take apart a completed set, keeping its pieces together or adding them to your loose bricks; reset it to find the pieces again
- Links to the manufacturer's parts store and building instructions
- Full data backup for free, and restore within the free set and loose-piece limits
- Text or image sharing of existing wishlist items is free
- “I bought it” is free within the set limit
Pro
- All your sets and different loose pieces, with no limit on their number
- All set ideas, including sets you may have pieces for, with theme and year filters
- Shopping-list options: BrickLink and Brick Owl exports, printing, filtering by set and choosing the order
- Wishlist management and collection organization: “Built”, tags, notes, “Sort & Filter”
- List imports and file exports for your collection, loose bricks and wishlist; Rebrickable and spreadsheet exports of “Pieces to buy” stay free
- iCloud sync between your devices, in your private iCloud space
- With both your App Store account country and iPhone region set to France, or both to Germany: dated new-set price comparisons, excluding shipping, “Sets for less right now” with each comparison explained, and price alerts below your target price. Shipping charges may be added and are confirmed by the store before payment. Affiliate links may earn BrickBack a commission, without affecting store order or your price
BrickBack Pro, inside the app
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Monthlysubscription, no commitment
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Yearlysubscription, no commitment
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Lifetimeone-time purchase
The subscription is taken out inside the app, on your iPhone. The monthly and yearly plans renew with no commitment and can be canceled from the device settings; the lifetime option is a one-time purchase. The exact price in your currency is shown in the app before you buy — the amount displayed by the App Store is the one that counts.
Features added since launch
Find your way with Collection · Bricks · Scan · Ideas · To buy. Open “Settings” with ⚙ in Collection. Each group below includes free features.
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My loose bricks
Available
- Pieces kept outside your sets, even ones a set needs, with color and quantity: 30 different pieces, counted once and for all, free; unlimited with Pro
- Editable quantities, sorting and exact-color filters in Bricks
- “Sets you may have pieces for”, from 20 loose pieces: 3 free; all sets and theme/year filters with Pro
- “Take from my loose bricks” for a set; take apart a completed set, or open its building instructions at the manufacturer
- Scanning in sequence: the camera stays open, one photo per piece
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Find
Available
- “Search for a piece”, without a photo — free
- “Where is this piece from?”: how rare it is and which catalog sets contain it, yours first — free
- “Pieces to buy”: every piece still needed across your sets, with Rebrickable and spreadsheet exports — free. Printing, filtering by set, choosing the order and BrickLink/Brick Owl exports require Pro
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Organize
Available
- “Scan a box”: read the printed set number on your iPhone to add it — free
- “My wishlist” in Ideas: priority, wanted quantity, target price and notes — managed with Pro. Text/image sharing stays free. “I bought it” is free within the set limit
- Collection organization: “Built”, tags, notes, sorting and filters — with Pro
- “Import a collection”: visible in Collection, with a lock on the free plan
Start for free, go Pro whenever you like
The free version does not expire. Pro is taken out inside the app, the day 2 sets are no longer enough.
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What to know before installing
No connection with the LEGO® Group
An independent app, published with no link, contract or approval from the LEGO® Group, and without its logo, its typeface or its artwork.
The photo goes to a third party
Recognition happens at Brickognize, a third-party service: scanning requires a connection, and every photo leaves your device. To read before you install — that provider's terms grant it a perpetual license over the images it receives, the training of its models included. The app asks for your agreement before the first photo; if you decline, no image leaves, and that agreement can be withdrawn at any time. Details in the privacy policy.
No account, and three ways to keep your collection
No sign-up, no address to give: your collection lives in your iPhone. Price alerts send a registration, wishlist set numbers and target prices to our server, only when you activate them; turning them off requests deletion. To find it again on another phone, there are three ways. The device's iCloud backup, if it is turned on: an iPhone restored from that backup, with the same Apple Account, finds it again. An export of your data, free at any time, to keep and restore on a new phone (without Pro, within the limits on sets and different loose pieces). And, with BrickBack Pro, iCloud sync: your sets, progress, loose bricks, wishlist and organization are meant to follow your devices, in your own private iCloud space — we have no access to it; it needs a signed-in iCloud account and available storage. Without one of the three, the collection stays on the old device. The subscription follows your Apple Account, and “Restore Purchases” brings it back.
Price alerts, with your consent
Pro price alerts are available when your App Store account country and iPhone region are both France or both Germany. Enabling them sends the device notification token, a random registration identifier and secret, country, Pro expiration and renewal status, and wishlist set numbers with comparable target prices and currency to our server. Notifications require your permission. Turning alerts off requests deletion of the registration; offline deletion is retried when the network returns. Details and retention periods are in the privacy policy.
A question, a problem
Write to contact@getbrickback.app: support, access to your data, reporting an issue.
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Frequently asked questions
Short answers to the questions we are asked before installing.
Is there a free app that can identify LEGO® pieces?
Yes. BrickBack identifies a LEGO® piece from a photo, then shows which incomplete sets in your collection need it. Scanning is free and unlimited. The free plan counts 2 sets and 30 different loose pieces once and for all; removing them does not free a place.
How does BrickBack identify a LEGO® brick?
You photograph it with your iPhone. Brickognize, an online recognition service, identifies the piece; BrickBack shows its image, name, color and part number in the instructions when available. Scanning needs a connection and your agreement before the first photo. You can withdraw that agreement in Settings.
A piece is missing from my LEGO® set — what can I do?
BrickBack lists missing pieces by piece and color, from a catalog of over 28,000 LEGO® sets. Photograph a loose piece: the app shows which of your sets need it. Choose a set, mark the piece as found and watch its progress. “Pieces to buy” lists what is still needed, always up to date, with free Rebrickable and spreadsheet export. Individual-piece prices are shown at the manufacturer’s shop; BrickBack places no orders.
Does BrickBack work offline?
Largely. After the first catalog download, your collection, set contents and missing-pieces lists can be browsed without a connection. Scanning, catalog updates, new-set prices and price alerts require a connection. Price features are Pro, in France and Germany only, with matching App Store account country and iPhone region.
Which LEGO® sets are covered?
Over 28,000 LEGO® sets, with their contents piece by piece and color by color, from Rebrickable data. Extra pieces included in the boxes are excluded from the count: a set is complete when every piece needed to build it is there.
What does BrickBack cost?
The free version includes unlimited scanning, 2 sets and 30 different loose pieces, counted once and for all, piece search, possible set origins, box scanning, three set ideas per theme and three sets you may have pieces for from 20 loose pieces. “Pieces to buy” and its Rebrickable/spreadsheet exports are free. Pro removes the set and loose-piece limits and adds all set ideas and filters, wishlist management, collection organization, other list imports/exports, BrickLink/Brick Owl shopping-list exports, printing, set filtering, choice of order and iCloud sync. New-set prices and price alerts require Pro, with both the App Store account country and iPhone region set to France, or both to Germany. Pro offers monthly or yearly subscriptions or a one-time lifetime purchase; your local price is shown before purchase. Full data backup remains free.
Do I need an account?
No. No sign-up, no address to give: your collection lives in your iPhone and is included in its iCloud backup if you have enabled it. You can export it to a file at any time, free of charge.
Which devices is BrickBack available on?
On iPhone, running iOS 26 or later. There is no version for iPad or for Android, and no date is announced.
Is BrickBack an official LEGO® app?
No. BrickBack is an independent app, with no link, contract or approval from the LEGO® Group. It cites the names and numbers of LEGO® sets and pieces descriptively, because that is what it is made for.
Can I try BrickBack without paying?
Yes. BrickBack is a free download with no time limit on its free version: unlimited scanning, “Search for a piece”, “Where is this piece from?”, “Scan a box”, 2 sets and 30 different loose pieces counted once and for all, and three sets you may have pieces for from 20 loose pieces. “Pieces to buy” and its Rebrickable/spreadsheet exports are free. Pro is purchased inside the app when you decide; nothing is charged before then.
How do I cancel BrickBack Pro?
From the iPhone settings, under the subscriptions of your Apple Account. The monthly and yearly plans have no commitment: canceling takes effect at the end of the paid period. The lifetime option is a one-time purchase, with no renewal.
Our guides: Missing LEGO® pieces, find them or replace them · How to complete an incomplete LEGO® set · How to identify a LEGO® piece · Gift ideas