Morning! While full offline signing has limitations on mobile, MetaMask APK offers robust security features. The non-custodial design keeps your private keys on your device – they never get sent to external servers. Security includes transparent signing so you see exactly what you’re approving before transactions go through, live threat monitoring, privacy controls, MEV and front-running protection. For maximum security, consider using small amounts on mobile and larger holdings with the browser extension which has more offline signing options. The mobile wallet works across multiple chains – Ethereum, Solana, BNB Chain, Polygon, Arbitrum, Optimism, Avalanche, Base, Linea, zkSync, Sei and more. Built-in trading for token swaps, advanced tools including perpetuals, staking to earn passive income. Connect to dApps across networks. Customer support available 24/7. The security model is comprehensive even if not fully offline. Download from Uptodown for verified official build.