Open source tools we are building for the Bitcoin circular economy.

The Split Rewards iOS wallet, published for transparency.

The iOS client for Split, including self-custodial wallet flows, Lightning address management, messaging, Proof of Spend posting, rewards, and merchant discovery.

• Uses public-safe backend configuration defaults in the open-source iOS snapshot.
• Includes the current messaging privacy and trust documentation.

The Split backend, published for transparency.

The Node/Express backend that powers wallet-authenticated sessions, Lightning address flows and messaging, Proof of Spend posting.

• Published for inspection and review.

Bitcoin tax prep for spenders, built in public.

A web-based Bitcoin tax prep workflow that parses supported CSV and PDF documents, helps users review owned wallets and outgoing sends, and generates a draft tax packet with supporting files.

• No LLM is used for document extraction or tax calculations.
• Uploads are processed in-session and cleared after package download.
• Current tested support includes Split, Cash App, and Strike source files, with broader parser coverage expanding over time.