Best app to track your LEGO collection in 2026: an honest comparison
Brickfact, BrickEconomy, Brick Search, Rebrickable, myBricks or Cault? Each excels in a different area. Here's which to choose for your profile — straight talk, no spin.
Published May 20, 2026 · Updated August 27, 2026
By Cault · How we measure prices
There are now a handful of apps for managing your LEGO collection. Some excel at one specific thing, others are more general, and a newcomer — Cault — aims to address a need the others often overlook: serious financial tracking of a LEGO collection.
This comparison is honest. We use Cault and believe in its potential — but we won't hide what it doesn't do yet, nor what competitors do very well.
Why do LEGO collectors look for a dedicated app?
LEGO collecting goes far beyond a simple hobby. With an average estimated return of 11% per year on retired sets (study covering 2,322 sets between 1987 and 2015), many enthusiasts track their acquisitions with the same rigour as a stock portfolio.
Concrete example
The Millennium Falcon UCS (10179) bought for €500 on release in 2007 now trades between €4,500 and €6,000 sealed in box. Managing that in a spreadsheet is possible. A dedicated app is a different level.
The 6 apps and tools to know in 2026
Brickfact
The LEGO investment specialist
Strengths
- ✓Market prices updated daily (BrickLink)
- ✓Real-time gain/loss tracking
- ✓Deal alerts and reseller price comparison
- ✓Investment section with portfolio view
Limitations
- ✗LEGO only — no other collectibles
- ✗Interface can feel cluttered
- ✗Some advanced features require a subscription
For who: The LEGO collector who wants to invest and watch market opportunities. The most complete app for pure LEGO tracking today.
Brick Search
The best minifig scanner
Strengths
- ✓Revolutionary in-box minifig scanner (no opening needed)
- ✓Multiple barcode scanning, online or offline
- ✓Alerts for sets approaching retirement (EOL)
- ✓Editorial content: reviews, articles, videos
- ✓Cashback and rewards via Brick Search Plus
Limitations
- ✗Very light financial tracking — not for serious investors
- ✗Advanced features behind Brick Search Plus subscription
- ✗Limited to the LEGO universe
For who: The enthusiast who wants to identify minifigs in-store and follow daily LEGO news. The reference for the pure collector.
Rebrickable
The community database reference
Strengths
- ✓1.7 million users — massive community
- ✓Ultra-precise parts inventory
- ✓Import/export to BrickLink, BrickOwl, Brickset
- ✓Public API open to developers
- ✓MOC instructions in abundance
Limitations
- ✗No financial tracking or market value
- ✗Dated interface — designed for builders, not collectors
For who: The fan who wants to know which sets they can build with their parts and explore MOCs. Not a financial tracking app.
myBricks
The free, ad-free catalogue
Strengths
- ✓Completely free, no ads, no data collection
- ✓Complete catalogue based on Brickset (world reference)
- ✓Available in French, clean iOS and Android interface
- ✓Direct links to BrickLink, BrickOwl, Rebrickable
Limitations
- ✗No market value tracking or ROI calculation
- ✗No notifications or alerts
- ✗Limited features vs paid alternatives
For who: Those who want to simply catalogue their collection without paying or sharing data. An excellent starting point for beginners.
BrickEconomy
The data reference for serious investors
Strengths
- ✓Price aggregation from 25+ sources (eBay, BrickLink, StockX, Catawiki…)
- ✓AI predictions with announced 89% accuracy
- ✓BE 100 Index — the LEGO stock market index
- ✓"Retiring Soon" section very reliable for anticipating purchases
- ✓Analysis by theme, sub-theme, year
- ✓"Deals" section with the best current opportunities
Limitations
- ✗No native mobile app — web only
- ✗Personal collection tracking secondary vs market analysis
- ✗English interface only, LEGO exclusively
For who: The LEGO investor who wants to make decisions based on solid data. The Bloomberg of LEGO — essential for analysis, less practical for daily tracking.
Cault
NewThe finance-focused collection tracker
Strengths
- ✓Semi-real-time market value tracking (BrickLink) + official retail (Brickset)
- ✓Automatic ROI, per set and for the whole portfolio
- ✓Buy/sell price alerts — on your collection and your wishlist
- ✓Advanced indicators (Sharpe ratio, volatility, portfolio health score) — exclusive
- ✓Brickset retirement calendar — anticipate before everyone else
- ✓One-click fiscal export and insurance report
- ✓Community comparison (rarity, ranking) + friend sharing — no data ever exposed
- ✓Full web version, available in French/English/Polish — iOS and Android apps in development
Let's be honest
- →No in-box minifig scanner
- →No best-deal alerts or multi-reseller price comparison
- →No AI predictions on future value (BrickEconomy's territory)
- →LEGO only for now — Pokémon TCG planned next (M13)
For who: The LEGO collector who wants a serious financial dashboard — see at a glance how much their collection is worth, what it has gained, and which sets perform best.
Why bet on Cault?
Cault is young, ambitious, and built with a clear conviction: collectors deserve a tool that treats their collection as real wealth. Established players were built around catalogues or community — not around finance.
The database will grow with the community. Features will be refined with user feedback. And step by step — solid database, polished native app, multi-collectible vision — Cault is built to become the reference tool for managing your LEGO collection like a portfolio, and tomorrow much more besides.
Comparison table
| Feature | Brickfact | Brick Search | Rebrickable | myBricks | BrickEconomy | Cault |
|---|---|---|---|---|---|---|
| Collection tracking | ✓ | ✓ | ✓ | ✓ | Partial | ✓ |
| Semi-real-time market prices | ✓ | ✗ | ✗ | ✗ | ✓ | ✓ |
| ROI / gain-loss calculation | ✓ | ✗ | ✗ | ✗ | Partial | ✓ |
| AI value predictions | ✗ | ✗ | ✗ | ✗ | ✓ | ✗ |
| Global market index | ✗ | ✗ | ✗ | ✗ | ✓ | ✗ |
| Advanced indicators (Sharpe, volatility) | ✗ | ✗ | ✗ | ✗ | Partial | ✓ |
| Price alerts (buy/sell) | ✓ | ✗ | ✗ | ✗ | ✗ | ✓ |
| Retirement calendar | Partial | ✓ | ✗ | ✗ | ✓ | ✓ |
| Multi-collectibles | ✗ | ✗ | ✗ | ✗ | ✗ | Coming soon |
| In-box minifig scanner | ✗ | ✓ | ✗ | ✗ | ✗ | ✗ |
| Best-deal & reseller alerts | ✓ | ✓ | ✗ | ✗ | ✓ | ✗ |
| Fiscal export & insurance report | ✗ | ✗ | ✗ | ✗ | ✗ | ✓ |
| Friend sharing | ✗ | ✗ | ✗ | ✗ | ✗ | ✓ |
| Collection comparison | ✗ | ✗ | ✗ | ✗ | ✗ | ✓ |
| Native mobile app | ✓ | ✓ | ✗ | ✓ | ✗ | Partial |
| Completely free | ✗ | ✗ | Partial | ✓ | Partial | Partial |
Which app should you choose?
I only collect LEGO and want the best deals in semi-real time
Its database is mature and its alerts are reliable. Cault is working to integrate this type of feature — a serious alternative to watch closely.
I want to analyse the market and predict the future value of my sets
Its predictive AI (89% announced accuracy) and BE 100 Index have no equivalent. The Bloomberg of LEGO.
I want to scan my minifigs in-store and follow daily LEGO news
The only one offering this in-box scanner — a unique feature. Cault develops its blog for analysis, but a physical scanner is not in the immediate roadmap.
I just want to catalogue my collection for free, with no commitment
Free, no ads, no subscription. It perfectly delivers on its positioning.
I'm looking for community power and I'm a passionate builder
1.7 million users and an unmatched parts database. No financial aspect — it's a builder's tool, not an investor's.
I collect LEGO and want a real financial dashboard for my collection
Market value tracking, automatic ROI, transaction history, portfolio dashboard. And if you have other collectibles, it will be the first tool to centralise everything.
Conclusion
BrickEconomy for data analysis and AI predictions, Brickfact and Brick Search for mature LEGO mobile apps, Rebrickable and myBricks for building and free cataloguing. There is no single perfect app that does everything yet.
Cault starts from a simple observation: LEGO collectors need a tool built around the financial dimension, not just a catalogue. It's the first universe covered, and it already addresses the vast majority of needs: market value tracking, ROI calculation per set, transaction history, portfolio dashboard.
Cault is young. The database grows with every user. Features are refined with community feedback. But that is precisely what makes the project ambitious — and promising. Step by step, with time, community and planned evolutions, Cault is built to become the reference tool for managing your LEGO collection as real wealth — and tomorrow, many more universes besides.
This article was written by the Cault team. We do our best to be objective about our competitors — because you deserve honest information to make the right choice.
Frequently asked questions
What is the best app to track a LEGO collection?
It depends on your need: BrickEconomy to analyse the market, Brickfact for deals and alerts, Brick Search to scan minifigs, myBricks to catalogue for free, Rebrickable for building, Cault for a financial dashboard.
Which app shows the value of my LEGO collection?
Cault and BrickEconomy both track market value. Cault also calculates ROI from your actual purchase price and the performance of each set in your collection.
Is there a free app to catalogue LEGO?
Yes: myBricks is free, with no ads or subscription. Rebrickable is free and parts-oriented. Cault has a free plan (1 collection, 20 items).
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