FLETA is the platform for a sustainable DApp ecosystem which provides developers more freedom and flexibility. FLETA has resolved the GAS issue of Ethereum, the Staking of EOS, and the problem of scalability. An independent multi-chain structure allows for the number of DApps to be increased without leading to network overload and the DApps can operate independently. FLETA also provides a faster transaction processing speed through block redesign, using Level Tree validation instead of Merkle Tree validation, PoF (Proof-of-Formulation) consensus model, and parallel sharding. The PoF consensus model also prevents potential unnecessary fork by reducing the competition about who mines and creates blocks, as well as providing real-time confirmation.