If you have the impression that you dialing app doesn't have enough features, then you might want to pay attention to this one. Not that Mr. Number is a fiesta of tools and features, but it has one that is lacking in most phones: call blocking.
Mr. Number Call Block stops your phone from signaling you and rejects the call when coming from a blocked number, but also from reported fraudulent or spamming numbers, similar to an e-mail spam filter. I personally can't test this as I don't get spammed that often, luckily.
Moreover, you can use Mr. Number to search your contact list and dial yourself, making it a welcome change of scenery for those who like to make phone calls a lot.