When you start a focus session, you stake a small deposit from your Costly balance. As long as you stay off your blocked apps and remain active within your timer, your deposit remains untouched and continues to grow in value inside your account.

If you break focus by opening a distraction, pausing your session, or tampering with settings, Costly instantly issues a small penalty charge via Stripe. These penalties accumulate into your in-app balance, which you can only withdraw once you've achieved specific personal goals, such as a set number of clean hours or streak days.

Costly uses a secure, cloud-synced architecture powered by Convex for real-time data synchronization across all your devices. Cross-device syncing ensures your focus sessions, penalties, and progress are instantly updated whether you're on your phone, tablet, or computer.

Financial transactions are handled through Stripe and Plaid integration, providing bank-level security for deposits and penalty charges. Alpaca Markets integration enables your deposits to grow through low-risk investments, turning your focus sessions into a genuine wealth-building mechanism.

App blocking is handled natively through Apple's FamilyControls and ManagedSettings frameworks, meaning blocked apps are truly restricted during active sessions—no workarounds, no exceptions.

The app's interface follows a Liquid Glass design language: a monochrome interface with subtle colors and a dark, reflective silver aesthetic inspired by composure and clarity. Every element is built for quiet immersion: rounded cards, subtle blurs, ambient reflections, and smooth transitions that make the UI feel alive but not distracting.

The minimal design philosophy extends to every interaction—no unnecessary animations, no distracting colors, no visual noise. Just clean, purposeful interfaces that fade into the background while you focus on what matters most.

The future of focus includes multiplayer accountability with friends and family. Share focus sessions, create group challenges, and build supportive communities around productivity. When you're struggling to stay focused, your accountability partners can provide gentle encouragement or even help cover penalty costs.

Family members can create shared focus goals, track each other's progress, and celebrate milestones together. Friends can form focus groups for study sessions, work sprints, or creative projects. The social element transforms individual discipline into collective achievement.

Additional features in development include advanced analytics, custom penalty structures, integration with productivity tools, and AI-powered focus coaching based on your behavioral patterns.