An application platform refers to a software framework that provides the necessary tools and services for developers to build, deploy, and manage applications. Full definition
Why not create a decentralized application platform everyone could use right away? (investinblockchain.com)
Yet, as mentioned, that definition might sound underwhelming in the context of ethereum, the alternative blockchain applications platform that allows developers to create virtually any kind of smart contract. (coindesk.com)
And across this breadth of devices, we are delivering one application platform for our developers. (blogs.windows.com)