Walden is an open source, private mood tracker and journal that lives entirely on your device. No accounts. No cloud. No data collection. Just you and your thoughts. Track your mood daily, write freely in your journal, and reflect on patterns over time — all without signing up for anything or trusting a server with your most personal data. Free forever. Open source on GitHub. Export your data anytime — it's yours, not ours. Your Mind. Your Data. 🧠🌿