Better Wallet logoOPEN SOURCE · OFFLINE · CLEAR SIGNING

Sign what you see.Not what you hope.

My friend got hacked and lost his crypto. I built Better Wallet to solve that personal self custody: fully offline custody, Clear signing, and a DIY build anyone technical can audit.

Supported networks

  • Solana
  • Ethereum
  • Stellar
Build one of your own.See why this exists
Better Wallet hardware prototype showing clear-signing confirmation screen

live reel

Walkthrough videos

Full YouTube walkthrough.

Full YouTube walkthrough

Why Better Wallet

The current wallet landscape keeps failing users

News and social posts describing wallet attacks

Real incidents

Fake apps, spoofed hardware, and phishing still exploit trust at the signing step.

“Blind signing turns every transaction into a leap of faith.”

Better Wallet makes intent legible before approval: function, dApp, contract, and risk level are shown on-device.

Reference comparison table between wallet devices

Commercial options optimize convenience. This project optimizes auditable custody.

Trust Boundary

Clear signing instead of raw blind payloads

Blind signing

What users usually approve

0xb010...aa3f
0x7f2d...991c
0xe4f8...117d
INPUT DATA (opaque)

Clear signing

What Better Wallet shows

Intent: Swap

Function: execute(bytes,bytes[],uint256)

dApp: Uniswap Labs

Contract: 0x39D4...67599

SECURITY LEVEL: HIGH

How it compares

FeatureLedgerSafePALTangemBetter Wallet
Airgapped✕QR NFC NFC ✓
Clear signing✓✕✕✓
Hardware open source✕partial ●✕DIY ✓
Cost$200-$400$70-$100$59-$180$30-$40
Malicious app attack?Incidents reportedPossible with blind signingPossible with blind signingNo

Story

How I landed on a DIY hardware wallet

This started as a personal response to a real loss. I first built Better Wallet during ETH Online 2025, where we won second place using an old phone as both an offline hot and offline cold wallet. We then reused and improved the project at Stellar Builder Garage and won first place with hardware plus QR-code signing. We then won second place at the Solana Colosseum Network State Bounty before ETHGlobal New York 2026, where we won first place in the Uniswap Bounty Track after revamping and rearchitecting the entire hardware stack for NFC and better UI/UX flows. We created a new app from scratch that supports cross-chain, EVM, and Solana.

  1. 01

    ETH Online 2025 — 2nd place

    Built the first Better Wallet using an old phone as offline hot and cold wallet.

  2. 02

    Stellar Builder Garage — 1st place

    Extended the same project with hardware-assisted QR-code signing.

  3. 03

    Solana Colosseum Network State Bounty — 2nd place

    Won second place with Better Wallet while iterating on Solana-focused flows.

  4. 04

    ETHGlobal New York 2026 — Uniswap Bounty Track 1st place

    Revamped the hardware for NFC-first UX and built a new app from scratch for cross-chain, EVM, and Solana.

DIY hardware

Open source. Audit it. Build it.

Circuit diagrams, a five-step Pi build, and a full bill of materials — everything you need to assemble your own Better Wallet for around $40.

Supported networks

  • Solana
  • Ethereum
  • Stellar
Build one of your own.