Echo is a media memory application for macOS that automatically records and indexes every piece of audio and video content played across a user's applications and web browser. Its primary function is to maintain a comprehensive, searchable history of all media playback, allowing users to resume any song, podcast, or video at the exact second they left off with a single keystroke. The application operates as a menu bar utility, capturing playback metadata from various sources and storing it locally on the device. It requires no user account and processes all data on device, with a one time purchase price of $9.99 that includes all future updates. The application offers a range of features for managing and revisiting media. It maintains a unified history across all applications and browser tabs, displaying each day's listening as a color coded waveform. Users can bookmark specific moments, including the ten seconds preceding the bookmark. A floating video player can be set to hover over other windows and become transparent for click through access. The app supports keyboard shortcuts for saving, filtering, navigating, and resuming content. It also provides a QR code feature for transferring playback to a mobile device at the exact second. Users can pin, rename, recategorize, and copy timestamped links to specific moments. The interface adapts its accent color based on the current media artwork, with an option to set a custom color. Typical use cases include resuming half watched videos or half heard podcasts across different applications and browser tabs. A user can press a single keystroke to return to the exact second they left off in any previously played media. The app captures a waveform of the day's listening, with each session displayed in its own color for visual navigation. Users can bookmark moments that resonate, including the ten seconds before the bookmark point. The workflow involves the app running quietly in the menu bar, automatically logging all playback, and allowing the user to summon, filter, navigate, and resume any item using keyboard commands. A QR code feature enables seamless transfer of playback to a mobile device at the exact second. Technical requirements include macOS version 13 or later. The license covers up to three Macs. The application processes all data on device and does not require an account or subscription. The purchase price of $9.99 is a one time payment that includes all future updates. The checkout process is handled through Polar. The app is designed to capture playback from both native applications and web browsers, presenting a single history view across all sources. It includes now playing widgets and history lists, with the ability to filter, rename, recategorize, and copy timestamped links using the command key shortcut.