Having ad’s in an app is something I personally find rather annoying and if truth be told I will generally pay for an app if there is a pro or plus version to ensure I don’t have to put up with them.
According to a recent study by Purdue University and Microsoft, apps with ads are probably responsible for about 70% of those apps’ battery usage.
The reason behind the massive battery drain is said to be based on the ads trying to gain location to give you area specific adverts.
If this isn’t enough to make you want to buy pro apps, who knows what is.
The study was possible thanks to a tool called EProf which allows developers to see how much energy in each thread in any given app is consuming. They plan to open source the tool sometime soon. Find more information about the EProf tool here.
Source: New Scientist