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Habits.Community.Open software.

We build in public, bit by bit.

BitByBit was born at La Crypta's hackathons, where we won two first places in 2026. The apps we build for the community are open source: anyone can use, study, and improve them.

Explore our projects

Our projects

Try them and tell us what you think.

obelisk.arScreenshot of ObeliskObeliskA Discord-style group chat that runs directly on Nostr relays, with no backend, database, or accounts: you sign in with your Nostr keys.

CURSATS

Lightning checkout for teachers — buyers pay in sats, you choose how to get paid.

CURSATS turns any class or course into a Lightning checkout. Buyers always pay in sats; the seller picks how the money arrives — pesos to a CBU via Wapu, or sats to a Lightning Address.

  • Two payout rails · Pesos via Wapu or sats to your wallet
  • Buyers pay in sats · You choose how to get paid
  • Built for educators · Teachers, tutors and academies
Collaborationnostr-wot.comScreenshot of Nostr WoTNostr WoTA Nostr extension that manages identity, event signing, an encrypted vault, and a Lightning wallet with WebLN.

BitByBit Run

Multiplayer runner racing on the web — sprint, fuel up, get zapped.

Run is a free, lightweight multiplayer racing game: up to 8 runners line up on an athletics track and sprint for the finish. Fuel up at the stations along the way to keep your pace — but choose wisely, not everything on the track is good for you. First across the line wins, and the winner gets zapped in sats.

  • Up to 8 players · Real-time browser races
  • Nostr-native · Log in with your keys, no signup
  • Winner gets zapped · Lightning sats for first place
Collaborationmappingbitcoin.comScreenshot of Mapping BitcoinMapping BitcoinAn open directory of businesses and communities that accept Bitcoin across six continents, built on OpenStreetMap and Nostr. Fabricio led its growth strategy.

BitByBit Arena

Public challenges on Nostr — identity, proofs and zaps.

Arena started as a New Year's resolution experiment inside La Crypta — a few of us wanted to improve our habits and share progress by tagging each other on Nostr. Today it's that same loop turned into an app: any Nostr identity can create challenges, join, and earn NIP-58 badges that travel across Nostr clients.

  • Nostr-native · Identity, proofs, and payouts
  • NIP-58 badges · Achievements that travel with you
  • Permissionless · Anyone creates, anyone competes

BitByBit Habits

Family habit tracker with sat rewards over Lightning.

Habits turns 'la mesada' (the kid's allowance) into a tool for financial education. Parents assign habits with sat rewards; kids complete them and receive real Bitcoin instantly via Lightning. Mesada 2.0.

  • Lightning Network · Real Bitcoin rewards
  • Family-first · Parents assign, kids complete
  • Mesada 2.0 · Real financial education

Friends

Projects and communities we admire, building open infrastructure.

Let's talk about your business

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