Your body works on a rhythm, and is guided by what is known as your circadian clock. At a certain point in this rhythm; Cortisol is produced - a hormone that makes you feel awake and alert. If you drink coffee at the same time that your cortisol levels are peaking, the effects of caffeine will be greatly diminished since you're experiencing a natural jolt.
You are able to get the setup package of Can I Coffee? 0.1.8 free of charge and have a look at users' reviews on Droid Informer. The app works fine on Android 6.0 and higher. The download of this application is 100% safe. Omatt is the developer of the tool which can be found in the Lifestyle category.
The most recent release was on Oct 4, 2018 and Can I Coffee? was downloaded and set up by over 1K users. The overall user rating of the app is 4.9.