BitTool Signer
Turn a spare phone into an offline crypto signer
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Turn a spare phone into an offline transaction signer. BitTool Signer keeps keys on the offline device and exchanges signing requests and signatures by QR. Supports Bitcoin, EVM, Solana and TRON, with public source and a separate online companion.
PH · launched Oct 30, 2026 · 3 upvotes (top 10%) · 0 views
Niche: non-custodial crypto wallets · 42 launches, 5 in the last 7 days ▼ -17% · Explore this niche →
Category and tags
- Fintech
- Dev tools
- Prosumer
- Not AI
- Hobby / open-source project
- Android
- Open Source
- GitHub
- Cryptocurrency
- Security
Visit website ↗ Source listing ↗
More like this: all 42 launches in non-custodial crypto wallets →
Could you build this?
Partial The QR request/response flow and UI are vibe-codeable, but secure key handling and correct transaction parsing across several chains need cryptography and security expertise that generated code often gets wrong.
What it would actually take: The architecture is an offline signing app with keys that never leave the device, exchanging signed payloads via QR with a separate online companion. The hard parts are secure key generation and storage, correct transaction decoding and signing for Bitcoin, EVM, Solana, and TRON, and protection against malicious payloads. A real version needs a security engineer or cryptographer and an independent audit before anyone trusts it with funds.
Competitors
Other products that read as similar to this one : 179 launches clear the similarity bar, closest 8 shown.
Attention rank: #11 of 180 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 359 days after the earliest competitor.
- AllCrypto · ph · 2026-09-18 · 1 upvotes · similarity 0.49
- NullKey · ph · 2026-11-09 · 1 upvotes · similarity 0.48
- Daggs · ph · 2026-11-04 · 5 upvotes · similarity 0.43
- Online Authenticator · ph · 2026-09-28 · 1 upvotes · similarity 0.43
- NexiaWallet · ph · 2026-09-15 · 1 upvotes · similarity 0.42
- SEN6TIF · ph · 2026-10-21 · 1 upvotes · similarity 0.41
- Cardamom · ph · 2026-11-03 · 3 upvotes · similarity 0.41
- Keydentials · ph · 2026-09-29 · 1 upvotes · similarity 0.41
The niche, labels, vibe code rating and competitor comparison on this page are analysis by Nicheloom. If you use them, please credit nicheloom.com. How you may use our data.