The best alternatives to Activa are FocusList, LaunchBar 6, and Radio Silence. If these 3 options don't work for you, we've listed a few more alternatives below.
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AssemblyAI— The most accurate API for conversational speech-to-text
FocusList is a productivity app that helps you get more DEEP work done. Plan your day with timeboxing, stay focused with Pomodoro technique and track your time with our advanced stats.
Reclaim your productivity by blocking distracting sites and applications, like Facebook and Fortnite. Stay on task and in flow to accomplish your best work!
adidas Running by Runtastic or formerly named Runtastic is an Austrian mobile fitness company that combines traditional fitness with mobile applications, social networking and elements of gamification as a logical reaction to the Quantified Self movement.