Derin — Deep Work Timer

Derin is a focus timer built for people who do real work — developers, writers, freelancers, and anyone who needs uninterrupted time to think.

Pick a session, start focusing, and see your progress live — right on your Lock Screen and Dynamic Island. No need to unlock your phone or check a tab. Just glance and keep going.

WHY DERIN?

— Live Dynamic Island & Lock Screen countdown
See your remaining time and progress ring without leaving what you're doing. No other focus timer makes this as seamless.

— Fixed focus lengths
Choose 25 or 50 minutes free, or unlock 90-minute sessions with Derin Pro. No decision fatigue, no custom timers to configure — just start.

— Streaks that matter
Complete one session a day to keep your streak alive. Simple to understand, satisfying to maintain.

— Session history
See today's session for free. Unlock unlimited history and weekly/monthly focus analytics with Derin Pro.

— Calm, distraction-free design
Dark by default, minimal, no gamification, no notifications begging you back. Derin gets out of your way.

Start your first session today.

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/