APT is the native token of the Aptos platform. The APT token is used to pay for transaction and network fees on Aptos.
Fees will be charged on all transactions on the network and are specified in Aptos tokens. Validators will have the opportunity to prioitise the highest-value transactions on the Aptos network, and to discard transactions of lower value. The result is that the blockchain would still be able to operate efficiently when the system is at capacity. Eventually, network fees will also be deployed so that the cost of using Aptos would be proportionate to the costs of deploying hardware, maintenance, and node operation.
In addition, APT can be used for governance voting on upgrades to the protocol and on/off-chain processes, and to secure the blockchain by way of a proof-of-stake model.
Validators holding a minimum number of staked APT tokens can participate in transaction validation on the Aptos blockchain. The benefit of being a validator is that they can decide on the division of rewards between themselves and their respective stakers. On the other hand, stakers can select any number of validators to stake their tokens with in order to receive a pre-agreed split of the rewards. Rewards will be distributed to validators and stakers at the end of every epoch.
At present, the maximum reward rate for stakers starts at 7% per annum and this amount is evaluated at every epoch. The maximum staking reward however will decrease by 1.5% per year until it reaches 3.25% per year. However, all reward amounts and mechanisms can be changed by governance voting.