Heroku introduces new types of Dyno.
If you are using the new “free” type, you can use Dyno Web and Dyno Desktop in one application for free.
If your Dyno computer goes to sleep, your working Dyno will also sleep. As soon as a new request arrives on your Dyno network, your working Dyno will also wake up. This is probably what you described in your script.
However, the free Dyno must sleep at least 6 hours a day!
Heroku will also migrate the 1x Dyno app to the “free” plan from July 1, 2015.
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