Push is a free iPhone app designed for developers and tech-savvy individuals in the Business & Productivity category. It enables users to create custom programmable notifications tailored to their needs. With Push, you can receive notifications about various events such as new sales on Stripe, errors in your web or mobile app, or new issues on GitHub.

The app offers two main ways to send notifications - through Zapier integration or directly via its REST API. Users can connect their Push account to Zapier to trigger notifications from various sources, or they can utilize the simple API call method to send notifications directly. Additionally, Push provides a free tier that allows up to 30 requests per month, making it accessible for developers, designers, and other users looking for customized notifications.