Good day! Professional TON custody requires robust security. Tonkeeper APK offers features suitable for portfolio management with proper procedures. Security for client funds: state-of-the-art encryption technology, two-factor authentication mandatory, non-custodial with clear custody chain, secure key storage on device. For portfolio managers: create separate wallets for each client or strategy, clear transaction history for reporting, address book for organized management, watch-only capability for monitoring. Professional custody practices: hardware wallet integration for large amounts, multi-device backup strategies, clear documentation of all transactions, regular security audits. Client reporting features: transaction history exports, balance tracking over time, clear records for tax purposes, transparent audit trail. The wallet features: unlimited wallet creation – separate client holdings, batch transaction capability, QR codes for client deposits, available in multiple languages. Best practices for professionals: never mix client funds with personal, use hardware wallets for significant amounts, maintain detailed records, regular security reviews. What you can manage: client TON holdings, staking positions, DeFi allocations, NFT portfolios. Security protocols: mandatory 2FA enforcement, regular backup verification, device security standards, recovery phrase security procedures. For professional use: wallet provides foundation, combine with proper procedures, insurance considerations, compliance requirements vary by jurisdiction. Download from Uptodown – verified source. Free wallet, works on Android 7.0+. Professional custody requires combining good tools with good practices.