Crono is a REST API for developers to programmatically schedule time-based jobs. Simply specify a trigger (e.g., crontab), a task (e.g., HTTP request), and you're done. It's also all web-based, so no need to install a library or set up clock processes.
When I was working on another project (Fitmeal), back in 2016, I implemented a large NLP module to find food entities in text messages. This week, I refactored that code and made it accessible through an API.
With Crono, you can make your application do something in the future: send an HTTP request every morning at dawn, email your users on their birthday, call yourself in 15 minutes… all that and more in just 2 lines of code.