An offline-first tool for conservation teams working across continents. See working hours, find meeting times, and respect everyone's boundaries.
Your team. Your time. Your space.
Get your team coordinated in three simple steps
Enter each team member's name, timezone, and working hours. Add notes about communication preferences.
Instantly view who's available now, who's sleeping, and who's almost done for the day.
Select participants and see overlapping hours. Schedule meetings that respect everyone's boundaries.
You've tried shared calendars. You've tried timezone converters. You've sent endless email chains trying to find a time that works. You've messaged back and forth: "what time works for you?"
But shared calendars demand everyone maintain synchronized schedules. Timezone converters make you do mental math every time. And coordinating via email or messages creates exhausting back-and-forth that still ends with someone joining at 3 AM.
Stone Circle is different. It provides persistent awareness without demanding constant updates. See your team's availability at a glance. Find meeting windows without asking. Respect boundaries without needing to remember who's where.
Built for teams that work asynchronously by default, with occasional synchronous coordination when needed.
Your field coordinator is in Costa Rica. Your research director is in New York. Your data analyst is in India. Your policy advisor is in Paris. How do you coordinate without overwhelming each other?
Most tools either oversimplify—just showing current times—or overcomplicate with enterprise calendar systems that require everyone to maintain synchronized schedules.
Stone Circle is different. It provides persistent awareness of your team's time zones and availability. Built for the way distributed teams actually work: asynchronous by default, with occasional synchronous coordination when needed.
Stone Circle is built for conservation teams, research collaborations, and distributed organizations where people work across field sites, universities, and partner organizations.
See your entire team at a glance. Current time, working hours, and availability status for everyone. Color-coded indicators show who's available right now.
Select participants and instantly see overlapping working hours. Visual timeline shows availability across all time zones with smart suggestions for times that work for everyone.
Team members traveling? Add temporary time zones for fieldwork, conferences, or research trips. Everyone can see where people are and plan accordingly.
Store communication preferences, working patterns, and notes. Know whether someone prefers WhatsApp for urgent matters or has limited connectivity in the field.
Tag team members by project, working group, or region. Filter and sort by any criteria. Star frequent collaborators for quick access via command palette.
Full functionality without internet connectivity. Perfect for remote field sites. Install as a Progressive Web App on any device.
See overlapping working hours across all time zones at a glance. The green zone shows when everyone is available.
Built different from traditional tools
Stone circles are ancient gathering places. They mark time and space, creating a shared reference point for communities separated by distance. They're patient, grounded, and permanent.
That's the kind of coordination tool we believe in. Not demanding instant responses or synchronized schedules. Just providing persistent awareness of when your teammates are available.
Stone Circle helps distributed teams stay connected without staying online. Know when to reach out. Find times that work. Respect everyone's boundaries.
Your team data never leaves your device. No accounts, no tracking, no servers.
All data lives on your device using your browser's IndexedDB. Nothing is ever transmitted to any server.
No analytics. No cookies. No surveillance. We don't track your usage or monitor your behavior.
No email required. No passwords. No personal information. Just open the app and start.
Export your data anytime as JSON or CSV. Import to another device. Your data belongs to you.
Stone Circle was created for distributed teams working across continents, especially conservation professionals who coordinate across field sites, research stations, and partner organizations.
We noticed that most tools either oversimplified time zone coordination or demanded that everyone maintain synchronized calendars. Neither works for teams that work asynchronously by default.
So we built something different. Something that provides awareness without demanding attention. Something that helps you coordinate thoughtfully across distance.
Stone Circle is a Progressive Web App. That means it works on any device, installs like a native app, and works completely offline.
No download required. Works on desktop and mobile.
Stone Circle is a Progressive Web App (PWA)—it installs directly from your browser, not the app store. This means instant updates, no tracking, and the same great experience across all your devices. Works best in Safari (iOS), Chrome (Android/Desktop), or Edge.
Ready to install? Open the app and follow the steps above.
Once installed, Stone Circle works completely offline and feels like a native app. You can uninstall it anytime from your device's app management settings.
Questions? Feedback? We'd love to hear from you.