Note: This project is no longer actively maintained and has been removed from the Chrome Web Store. It was originally published as a Chrome extension from 2016–2024 with 1000+ daily active users. The source code is preserved here for reference. You can still run it locally by loading it as an unpacked extension. See
potential_features.mdfor ideas if you'd like to fork and extend this project
A Chrome extension that reminded users to stretch every 30, 60, or 120 minutes with office-friendly exercises. Built to help people take care of their bodies during long work sessions.
- Timed reminders — stretch notifications every 30 minutes, 1 hour, or 2 hours
- Targeted exercises — upper body, lower body, or full body stretches
- One-click toggle — enable or disable reminders from the popup
- Popup window — exercises open in a dedicated window so they don't disrupt your tabs
- Offline-ready — all exercise data is bundled locally, no external API calls
| Popup | Exercise Notification |
|---|---|
 |
 |
If you'd like to try it out, you can load the extension from source:
- Clone or download this repository
- Open
chrome://extensionsin Chrome - Enable Developer mode (toggle in the top right)
- Click Load unpacked and select the repository folder
- The Stretch Reminder icon will appear in your toolbar
Click the extension icon in your Chrome toolbar to open the popup, where you can:
- Get an exercise now — open a stretch exercise immediately
- Change exercise type — cycle through Upper Body, Lower Body, and Full Body
- Change frequency — cycle through Every 30 Minutes, Every 1 Hour, and Every 2 Hours
- Enable / disable — toggle the reminder on or off
When a reminder fires, a popup window opens with a random exercise, including the name, rep count, step-by-step instructions, and an illustration.
├── manifest.json # Extension manifest (Manifest V3)
├── popup.html # Toolbar popup UI
├── notification.html # Exercise notification page
├── js/
│ ├── background.js # Service worker — alarm & notification logic
│ ├── popup.js # Popup controls & settings
│ ├── notification.js # Exercise selection & display
├── css/
│ ├── popup.css # Popup styles
│ ├── notification.css # Notification styles
│ └── bootstrap.min.css # Bootstrap (notification layout)
├── exercises/ # Bundled exercise data (JSON)
├── logo/ # Icons & screenshots
└── docs/ # GitHub Pages redirect
| Version | Date | Highlights |
|---|---|---|
| 0.5.1 | Feb 2026 | Fixed alarm firing on Chrome restart; fixed alarm timing not respecting frequency setting; minor bug fixes |
| 0.5.0 | Feb 2026 | Migrated to Manifest V3, removed jQuery/Bootstrap JS, localized exercise data, optimized tab tracking |
| 0.4.0 | Apr 2020 | API bug fixes, added About link in popup |
| 0.3.0 | Sep 2018 | API bug fixes, re-published to Chrome Web Store |
| 0.2.x | Aug 2017 | Design overhaul |
| 0.1.0 | Jun 2017 | First published version — frequency selector, exercise types, bootstrap styling |
This extension does not collect any personal data. All exercise data is bundled locally — no network requests are made except to load exercise images. No data is shared with any third party.
Special thanks to Dan, Cam, Jonathan, Inna, and the rest of the Physera team (now part of Omada Health) for helping improve the design, functionality, and code of the application.
This project is open source. Exercise data and illustrations are property of Physera / Omada Health.