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  3. eWallet vs KISS Signer DIY

Black Arrow Software eWallet vs DIYbitcoin KISS Signer DIY

What eWallet does better (0) and where KISS Signer DIY wins (1) — every spec side by side.

Black Arrow Software eWallet
Black Arrow SoftwareeWallet
0 advantages≈ €30
vs
DIYbitcoin KISS Signer DIY
DIYbitcoin · 2026KISS Signer DIY
1 advantage
3.3Open source7.4

Why is eWallet better than KISS Signer DIY?

eWallet has no measurable advantages in this pair.

Why is KISS Signer DIY better than eWallet?

  1. Source code availableNo · eWallet: Yes
Specifications

Side by side

Firmware & open source
Open-source firmwareNoNo
Source code availableNoYes
Reproducible builds—No
Upgradable firmware—Yes
Design
Weight7 g—
Length4.5 mm—
Width2.3 mm—
Thickness0.6 mm—
To compare: 0up to 4 models
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