Second Heart

5-minute 145 BPM circulation cadence metronome and focus timer.

Activate your "Second Heart" while working, studying, or watching video streams. Sitting stationary for prolonged periods causes venous blood to pool in the lower legs. Second Heart delivers a rhythmic 145 BPM circulation cadence paired with a 25-minute focus cycle to keep blood moving via seated calf/soleus activation without disrupting your workflow. For even greater circulation, standing up for a gentle, slow jog-in-place to the 145 BPM beat works even better. Free vs. Pro Features: • Free Tier (Chrome Extension Toolbar Popup): 145 BPM Web Audio circulation metronome (Percussive Tick, Soft Sine, Silent Flash) 25-minute focus routine timer with auto-pause Quick-access toolbar popup window Integrated Protocol & Anatomy Guide • Pro Tier (Persistent Chrome Side Panel Docking): Chrome Side Panel Docking: Locks the metronome side-by-side with your active browser tab, YouTube stream, spreadsheet, or doc without the popup auto-closing when you click away. Dedicated side-panel session persistence across tab switches. One-Click Pro License Key activation directly inside the extension popup. What You Receive: Unique Pro License Key for instant in-extension activation. Lifetime access to Pro features and updates on the Chrome Web Store.