Angie- Founder of YourApparelDifferent take in the pomodoro technique. It has different characters with different levels of strictness to focus on your task. Flip your phone to stay focused. The app will give a signal when it's time for a break. The app deducts points and reprimands you when you pick up your phone early. You can set blocks from 1-8 hours.
Nick Abouzeid- Words at Product Hunt ✌️Just downloaded it a few days ago - well designed, and I like the gamification portion. Worth trying out!