Apps connect to unknown IP
As Tetsujin mentioned in the comments, Akamai is simply a content delivery service with servers &amp; data centers around the world. The advantage to developers and companies is they get to access the closest server to your location for their ads or app content. 

Many ad networks use Akamai to get their ads and apps that use analytic services use them to get/send their data.  I'm about 99% sure there's nothing for you to worry about regarding the connections. You ran Malwarebytes and it said it didn't notice a problem and that's good.