Oh My Tracker is a free online habit tracker that operates without requiring user accounts or sign-ups. Its primary function is to help individuals build and maintain habits by providing a simple interface for daily check-ins. The application is designed as a local-first tool, meaning all user data is stored directly in the browser rather than on external servers, enhancing privacy. It is accessible as a progressive web application (PWA), allowing it to work offline after the initial visit and enabling installation as a full-screen app on a device’s home screen. The main features include daily, weekly, and monthly trend analytics that display progress over time and highlight when a streak is at risk. Users can view a weekly overview where each checked day fills with color, providing a visual representation of consistency. Optional web push reminders can be set for specific times. Device synchronization is achieved through an end-to-end encrypted link, which can be generated from the app and opened on another device to share data without requiring an account. The application does not include advertisements, subscriptions, upsells, or social feeds, focusing solely on the tracking function. Typical use cases involve individuals tracking personal habits such as exercise, reading, or meditation. The workflow begins by opening the page and checking off completed habits each day. Users can review their progress through the analytics section to identify trends. If a day is missed, the streak resets, but the historical data remains visible. For users switching devices, the sync feature allows the full history to be transferred by generating a link on the old device and opening it on the new one. The application is free to use with no hidden limits, and no email or password is required at any point.