The best free LEGO app depends on what you want to do. For pure set data and reviews, Brickset leads. For parts and custom builds, it is Rebrickable. For deals, Brickfact. And for tracking and timing the builds you own, SetSquad. The good news: all of them are free, and most builders use more than one.
Here is an honest rundown of the best free LEGO apps in 2026 and what each does best.
The best free LEGO apps at a glance
| App | Best for | Free |
|---|---|---|
| Brickset | Set data, specs, and reviews | Yes |
| Rebrickable | Parts and custom builds (MOCs) | Yes |
| Brickfact | Deals and price tracking | Yes |
| SetSquad | Tracking and timing your builds | Yes |
Brickset: the set database
Brickset is the most comprehensive LEGO database, with details and community reviews for nearly every set ever made. If you want to research a set before buying, this is the first stop. It is not built around the building experience, so it has no build timer. See how SetSquad compares on our SetSquad vs Brickset page.
Rebrickable: parts and MOCs
Rebrickable shines when you want to know what you can build from the pieces you already own, or when you want to browse millions of custom designs. It is deep on parts data and light on build tracking. More detail on our SetSquad vs Rebrickable page.
Brickfact: deals and prices
Brickfact is the one to reach for if your priority is paying less. It tracks prices across stores and sends alerts when a set hits your target, all free and ad-free. It does not time builds or run leaderboards.
SetSquad: track and time your builds
SetSquad is the only app here built around the building experience. It tracks your collection, times each build bag-by-bag, saves your personal best, and ranks your time on a global leaderboard. Curious how long your next set will take? Check its build-time page first, then time your own build. It is free on iOS and Android.
Which should you choose?
Most serious collectors run a small toolkit rather than a single app: Brickset to research, Rebrickable for parts, Brickfact for deals, and SetSquad to track and time the building itself. Since they are all free, there is no harm in trying each and keeping the ones that fit how you collect and build.