[filipsch]

If you’re using free Heroku dynos, the first visitor in a while will experience long load times because the dyno has to be spun up. This is a pretty bad experience. I’d spend the 7 dollars each month to make sure your dyno is always up.

[vidyesh]

https://kaffeine.herokuapp.com/

[gbourne]

Heroku limits the number of hours you can have up - 550 a month ( https://devcenter.heroku.com/articles/free-dyno-hours ). So if you have a system with real users, you really should just pay the $7 a month.

[MapleWalnut]

Additionally any deploy will give users a moment of downtime because Heroku only supports rolling deploys on paid dynos.