One Calendar

One Calendar

By Code Spark

One Calendar is a cross-platform productivity tool that aggregates multiple calendar services into a single, unified interface. It supports a wide range of providers including Google, Outlook, iCloud, Exchange, and various self-hosted solutions like Nextcloud and Synology. The app is notable for its broad compatibility and focus on providing a centralized view for managing appointments, events, and birthdays.

Overview · Full Intel report in progress

The App DNA

What makes this app unique?

For Users who manage multiple personal and professional calendars across different platforms and require a consolidated overview.

What does it look like?

Key features

Multi-Service Integrationstandard

Aggregates calendars from Google, Live, Outlook, iCloud, Exchange, Office365, Yahoo, and more into one view.

Self-Hosted Supportstandard

Provides compatibility with Nextcloud, Synology, GMX, Mailbox.org, and ownCloud.

Unified Event Managementstandard

Allows users to view and manage appointments, events, and birthdays across all connected accounts.

Cross-Platform Availabilitystandard

The application is accessible across all major platforms to ensure consistent scheduling access.

How much does it cost?

free

Velocity

Steady developmentShow more...

5 versions in history. Development pace: steady.

See all version history

Who built it?

Code Spark

3 apps tracked · Productivity

One TaskOne TaskOne TasksOne Tasks
Explore the full publisher profile

User Sentiment

What do users think recently?

How are ratings & reviews evolving?

Google Play
4.71 · 64k
App Store
4.76 · 20k

Not enough recent reviews to extract reliable themes yet.

Read the full review analysis

Competition

Competitive landscape for One Calendar

How's the Productivity market?

The rivals identified

The Analyst's Read

Key takeaways for One Calendar

Where is it heading?

Bottom line

One Calendar serves as a comprehensive aggregator for users needing to sync and manage diverse calendar accounts in one location.

Report last updated

Disclosure: Independent intel to help mobile builders succeed.

AI-powered analysis with automated quality gates, built from publicly available sources. Marlvel.ai is not affiliated with, endorsed by, or sponsored by One Calendar, its developer, the app publisher, Apple, or Google Play. All trademarks, logos, and screenshots referenced remain the property of their respective owners.

Cite this report

Marlvel.ai. “One Calendar Intelligence Report.” Updated Apr 17, 2026. https://marlvel.ai/apps/one-calendar

Agent Markdown (.md)See methodologyContact support

Data licensed under CC-BY-NC 4.0