# On-chain Scheduler ## **On-chain Automatic Scheduler** On Ethereum and most other EVM platforms, there is no way to automatically schedule a transaction natively. This means many useful and perhaps essential financial services that we take for granted today, such as subscription, are not possible. On Acala and Substrate, the automatic scheduler is a native feature of the blockchain. It is now made available in the Acala EVM in the form of pre-compiled contracts that any smart contract can call upon. This will enable a wide range of use cases such as automatic and recurring payment rails, subscription services such as a Web3 version of Stripe, automatic profit-taking, reinvestment mechanisms, and a means to liquidate risky positions without external actors like keepers. Try the auto-scheduler contract [here](/build/development-guide/smart-contracts/advanced/use-on-chain-scheduler.md). --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://wiki.acala.network/learn/acala-evm/acala-evm-composable-defi-stack/on-chain-scheduler.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.