Open Source Dart Calendar Software

Personal Planner is a free, open-source daily planner for Windows, macOS, Linux and Android. Plan your day in time blocks, time your tasks, and compare what you planned with what actually happened. I built it because I kept setting aside 30 minutes for a task, spending an hour on it, then making the same estimate the next day. Daily and weekly reviews keep your tasks, actual time and notes together, so you have something useful to look back on. Recurring tasks and templates help with regular plans. An inbox holds ideas for later, while experiments let you track a routine using time you've already recorded. It works offline without an account, with data stored on your device. Optional cross-device sync uses your own Supabase project and requires setup. Built with Flutter and SQLite, and released under the MIT license. No subscriptions or paid feature tiers.