Next.js 15 + Supabase · full source code
A daily planner and time tracker with a timer that can't lose time.
Plan your day → work on tasks → track actual time → compare planned vs actual → review your week. Deploy it under your own brand in about 20 minutes, or use it as the foundation for your own product.
Demo account is pre-filled on the login page. Start a timer, close the tab, come back — it's still running.
Timestamp-based timer
Elapsed time is derived from started_at / ended_at stored in Postgres — never from a browser counter. Refresh, sleep, or close the browser and it's still right.
Enforced in the database
One running timer per user via a partial unique index. Start, stop and complete run inside atomic SQL functions on the database clock. Row Level Security on every table.
The whole workflow
Quick-add, inline edit, move to another day, planned / actual / remaining totals, weekly planned-vs-actual chart, unfinished-task carry-over. Desktop and mobile.
Closed the browser mid-timer? On return the app asks: stop at last activity, stop now, or keep running.
Weekly review: planned vs actual per day, completed and unfinished tasks, one-click carry-over.
What you get
- Full TypeScript source — Next.js 15 App Router, React 19, Tailwind 4
- One SQL migration: tables, indexes, triggers, RLS policies, timer functions
- Supabase Auth with cookie sessions and protected routes
- Daily planning screen, timer, weekly history, settings
- README with Supabase setup, local run, Vercel deploy, customisation
- Commercial license: unlimited projects, no resale of the kit