BlockBuilder Studio ships as an offline desktop binary, a browser PWA, and a paid app on iPhone / iPad / Android. Same project file across all of them.
Available now
Desktop
Windows 10 / 11, macOS 12+, Linux (any glibc 2.31+). Fully offline.
Offline binary. No installer for the portable zip. Five clicks to running.
Download the build for your OS from the downloads section of the landing page. About 105 MB.
Right-click the zip, Extract All (Windows) or open the .dmg / .AppImage (macOS / Linux). Pick any folder with write access; the app is fully portable.
Open the extracted folder and double-click BlockBuilder Studio.exe (Windows), BlockBuilder Studio.app (macOS), or the AppImage (Linux).
Windows SmartScreen will say "Microsoft Defender SmartScreen prevented an unrecognized app...". Click More info, then Run anyway. The binary is signed under Azure Trusted Signing but Defender takes a few releases to learn new publishers.
First launch shows a Unit picker (mm / cm / inches). Pick once; changeable later in Settings.That is the whole install. No account, no email, no licence prompt until you do paid work.
macOS Gatekeeper: if you see "BlockBuilder Studio cannot be opened because the developer cannot be verified", System Settings → Privacy & Security → scroll to the bottom → Open Anyway. Apple notarisation is queued for the v0.7 release.
Web: install as a PWA
Runs in the browser tab, but also installable as a standalone app with its own icon. Works offline after the first visit (service worker pre-caches everything).
Chrome / Edge: a small install icon appears in the address bar after a few seconds. Click it → Install. The app opens in a frameless window with a Start menu / Dock entry.
Safari (macOS): File → Share → Add to Dock. The app behaves as a regular app from there.
Firefox: currently only the in-tab path (no install button). It still works fully offline once visited; just bookmark it.
Disconnect from the internet. Reload. The app still opens; the service worker serves the entire bundle from cache. Proof.Updates download silently in the background on subsequent visits. The notification toast tells you when a new version is ready to reload.
Storage on your device: the PWA bundle is roughly 7 MB, plus whatever your project autosaves occupy in IndexedDB. Clearing browser data wipes both; export your .json projects if you plan to do that.
Mobile shortcut: Add to Home Screen
Skip the App Store + Play Store path entirely by saving the PWA as a Home Screen icon. Same code, same data, free.
iPhone / iPad (Safari): open blockbuilder-app.pages.dev → tap the Share button (square with up-arrow) → Add to Home Screen. The icon appears like any native app. Tapping it opens fullscreen without browser chrome.
Android (Chrome): open the same URL → menu 3-dots → Add to Home screen (or Install app on newer Chromes). Same behaviour.
Once added, the PWA detects native (no browser chrome), shows the bottom dock + bottom-sheet layout, and works fully offline.
Why pay for the App Store version when this is free? The store apps will get a few platform-tied features the PWA can't reach (native Files integration on iOS, deeper Android background processing), plus you avoid Apple's iCloud limits on Add-to-Home storage. For most users the PWA path is plenty.
App Store + Play Store: paid app, coming soon
EUR 4.99 up-front, single purchase, no subscription. TestFlight + Play Internal Testing are rolling out before public release.
iPhone / iPad: bundle ID pt.marjers.blockbuilder. Internal testing through TestFlight; reach out to geral@marjers.com to be added.
Android phone / tablet: same bundle ID. Internal testing through Play Console; opt-in link will appear here once the first AAB is approved.
Public release: aimed at the back of summer 2026 along with the v0.6.0 desktop binary going stable. Email geral@marjers.com to be notified the day it lists.
Apple Family Sharing and Google Play Family Library are both honoured. One purchase covers everyone in your family group.