AirGap Vault vs Si4Keyboard

AirGap Vault is a blockchain agnostic crypto vault that turns your mobile phone into a cold wallet. AirGap Vault does not connect to any network, irrespective of the device used. This system built into the app makes it more secure than an ordinary crypto wallet. Transactions can be signed seamlessly without the use of cables, thanks to verifiable QR codes. This opens up multiple possibilities for interacting with other solutions. AirGap Vault is currently used alongside other companion apps like AirGap Wallet, MetaMask, Sparrow Wallet, BlueWallet, Specter, and any other QR code-based wallets. These companion apps serve as watch-only wallets that allow users to view portfolios and initiate transactions while the Vault signs transactions and protect your private keys offline. AirGap Vault supports: When paired with MetaMask - All EVM-compatible blockchains When paired with AirGap Wallet - Bitcoin - BTC, - Ethereum - ETH, - Polkadot - DOT, - Kusama - KSM, - Tezos - XTZ, - Cosmos - ATOM, - Moonbeam - GLMR, - Moonriver - MOVR, - Astar - ASTR, - Shiden - SDN, - Aeternity - AE, - Groestlcoin - GRS Features: - Segwit Support - MetaMask Support - Offline Address Overview - Secure Keyboard - Coin Flip & Dice Roll - Offline Key Generation - BIP39 Passphrase - Shamir Shares (Social Recovery) - BIP85 Child Entropy - Open Source Get the highest security by installing AirGap Vault on a separate smartphone, and never connect that phone with any network again. Another option is to install AirGap Vault and its companion app on the same device. Follow the step-by-step video on how to set up the AirGap solution: https://www.youtube.com/watch?v=M9ICKaLxuwQ To learn how to setup AirGap Vault with MetaMask watch this guide: https://www.youtube.com/watch?v=HIKJh0h7QiU

Si4Key: Secure Your Input, Empower Your Identity Si4Key is a privacy-first companion keyboard designed to enhance your existing input method with seamless local encryption, one-tap digital signature, and offline key management. Whether you’re sending private messages, signing documents, or inputting sensitive data, Si4Key ensures that every keystroke stays secure — without changing how you type. Key Features: • Local-first encryption — your input never leaves your device • Built-in support for OpenPGP/GPG digital signatures • Offline key storage — no cloud syncing, you’re in full control • Minimal and intelligent design — easy to use, smart when needed • Supports multiple languages with future-ready architecture Why Si4Key? Because your input method deserves the same level of protection as your data. Si4Key doesn’t replace your keyboard — it strengthens it. “Typing should be private. Signing should be simple. Si4Key makes both possible.”