What's a solid Android app that'll block spam calls and texts without draining my battery while I'm crushing a workout?

Alright, so I've been testing "Call Blocker - Block Numbers," and it's actually pretty legit. As a fitness instructor, I need to stay focused, and constant spam calls were killing my flow, especially between sets when I'm tracking recovery. This app's been solid at blocking those unwanted distractions. I love that it's not a resource hog; I'm already tracking my heart rate zones accurately with my fitness watch, and I don't need another app draining my battery. It's super customizable, so I can tweak the settings to block specific numbers or even entire area codes—perfect for dodging those pesky telemarketers. Plus, the interface is clean and easy to navigate, which is a huge win when I'm trying to stay in the zone. It's a game-changer for training and keeps me accountable by not letting junk calls steal my focus. Integration with my other fitness apps is seamless, too. Solid performance overall.