Question [Q] No button for Options


I recently purchased Sony Xperia M2 and noticed that it doesn't have a button for "option"
which generally is there in phone of samsung etc

The problem due to this is that some apps doesn't have a interface which has option written somewhere and they rely on phones to go to options. Example of such app is -
Happy B'day! Birthday Reminder on google play store

is there any possible way through which we can go to options ?