Heroku only gives you 550 free hours a month on the free tier. By using ping techniques to keep the server continuously awake will result in your server halting 3/4 into the month. I really don’t suggest this for a production app, and I bet kaffeine.herokuapp.com pays for their server.

Co-Founder of ayrshare.com — an API-first platform to automate your social media posts with a few lines of code.