Screenshots
See It in Action
Week View — Seven-day grid with color-coded events from multiple calendars, current time indicator, and calendar set switcher
Features
Calendar Without Compromise
A web-first calendar inspired by Fantastical. Natural language event creation, multi-provider sync, calendar sets for context switching, scheduling links, task integration, and weather overlays. Everything you need, nothing you don't.
Input & Parsing
Type It Like You Think It
Natural Language Input
Type "lunch with Sarah Thursday at noon" and watch it parse into a fully formed event. Handles dates, times, locations, durations, and recurrence patterns in plain English.
Multi-Provider Sync
Connect Google Calendar, Microsoft 365, iCloud, Fastmail, and any CalDAV-compatible server. Bi-directional sync keeps all providers in lockstep.
Calendar Sets
Switch between "Work," "Personal," and "Travel" contexts instantly. Each set controls which calendars are visible, which notifications fire, and which availability windows apply.
Scheduling & Tasks
Meetings That Book Themselves
Scheduling
Share availability booking links, send time proposals, and manage RSVPs. Recipients pick a slot that works; the event creates itself. No back-and-forth emails.
Task Integration
Syncs with Google Tasks and Todoist. Tasks appear on your calendar alongside events, so deadlines and time blocks live in the same view.
Weather & Travel
Weather overlay on day views so you can plan accordingly. Travel time estimates between events. Multi-timezone support for distributed teams and international travel.
Accessibility
Built for Everyone
WCAG 2.1 AA Compliance
4.5:1 contrast for body text, 3:1 for large text and UI components, in both light and dark themes.
Keyboard Navigation
Every interaction reachable via keyboard. Logical tab order, visible focus indicators, Escape-to-dismiss for modals.
Screen Reader Support
VoiceOver, NVDA, and JAWS tested. Semantic HTML, ARIA labels, live regions for dynamic updates.
Reduced Motion
Respects
prefers-reduced-motion. Usable at 200% zoom. Touch targets meet 44x44 minimum.
How It Works
From Account to Autopilot
Step 1: Connect
Link your Google, Microsoft, iCloud, or CalDAV accounts. OAuth handles authentication; calendars appear within seconds.
Step 2: View
See all calendars unified in day, week, or month views. Color-coded by provider and calendar. Switch layouts with a single click.
Step 3: Schedule
Create events with natural language or find open times with scheduling links. Share a booking page and let invitees pick their slot.
Step 4: Automate
Calendar sets switch context automatically based on time or location. Tasks surface at the right time. Travel alerts fire before you need to leave.
Technical Specifications
Under the Hood
Backend
- FastAPI (Python 3.12+)
- PostgreSQL + SQLAlchemy 2.0
- Alembic migrations
- Redis/Valkey caching
- CalDAV and OAuth2 integrations
Frontend
- React 19 + TypeScript
- Vite build system
- Geist font (internal tool)
- CSS Modules with AVIAN design system
- Light and dark mode
Real-Time
- WebSocket for live calendar updates
- Bi-directional provider sync
- Instant event creation feedback
- Live RSVP status updates
Infrastructure
- PostgreSQL (shared RDS)
- Redis/Valkey cache layer
Development
100% Built by Claude
Every tool in the Renkara fleet was built by Claude (Anthropic) working alongside a single human supervisor. Every line of code, every test, every deployment: AI-authored with human direction. The leverage factor across the fleet runs in the 20x–50x range, with individual sessions regularly exceeding 100x.
See the daily leverage records for per-task numbers across the full build history.