TimeTree, Inc., the global shared-calendar platform, announced it has surpassed 70 million users worldwide. What began in 2015 as a tool for families, workplaces, and communities to coordinate plans is now in a period of great expansion: a schedule-centered AI that reads context and recommends action.
The foundation is a corpus of more than 14 billion registered events accumulated over nearly a decade. Time Tree entered a capital and business partnership with SK Telecom in September this year to strengthen data/AI capabilities. Based on this, the service will be advanced in the direction of implementing reservation automation, information and service connection, and next action proposals by using schedule as a natural trigger for AI.
TimeTree's AI vision centers on appropriate intervention. The system interprets calendar entries as context and intervenes only when it matters—a "quiet agent" approach rather than another notification layer.
TimeTree aims to build an agentic AI that understands user context and intent more deeply than general-purpose assistants. For example, if a user with a Singapore trip scheduled in two weeks searches for a bag, the agent recognizes the travel context and adjusts recommendations accordingly. With user consent, TimeTree is also pursuing interoperability with trusted third-party agents—ultimately shaping a standard protocol for inputs and outputs between calendars and external services. All personal data handling follows privacy-by-design principles, with user-controlled consent and straightforward opt-out.
"TimeTree's AI is not about saying more—it's about saying the right thing at the right time," said Chajin Park, CEO of TimeTree. "A schedule is the most trustworthy signal in everyday life and the starting point for action. Building on that signal, we will recommend optimal next steps, help people coordinate with one another, and connect them naturally to places and services." Park added, "With partners in Korea and globally, we intend to establish a new, schedule-centered user experience—an agentic AI that understands context and intent, and a protocol that links calendars with the wider service ecosystem."
TimeTree will direct resources from this milestone toward advancing core AI features, recruiting top talent, and expanding globally, with Korea and Japan as key hubs.
About TimeTree
Founded in 2014, TimeTree is a global shared-calendar platform that enables multiple calendars per purpose and real-time coordination across families, teams, and communities. The company is expanding its Public Calendar ecosystem, which distributes events from entertainment, sports, and municipalities in calendar format for effortless integration into personal schedules.
TimeTree Links
Usage: https://support.timetreeapp.com/hc/en-us
Android: https://play.google.com/store/search?q=timetree&c=apps
IOS: https://apps.apple.com/us/app/timetree-shared-calendar/id952578473
Company Information
Established: Sep 1st, 2014
Founder & CEO: Frodo (Chajin) Park, Fukagawa Yasuto
Address: Central Park Tower 18F, 6-18-1 Nishishinjuku,
Shinjuku-Ku, Tokyo, Japan
Business: Planning and management of the calendar sharing app "TimeTree"
Country: Japan
About the Calendar Sharing App TimeTree
The calendar sharing app 'TimeTree' is a calendar service premised on sharing and communication. It allows easy schedule sharing among multiple people—families, partners, clubs, workplaces, and more—and enables users to create multiple calendars tailored to different purposes. Since beginning service on March 24, 2015, it has surpassed 67 million registered users worldwide as of August 2024. It is widely used in users' daily lives as a "wall calendar inside your smartphone."
Media Contact
Company Name: TimeTree, Inc.
Contact Person: Leo Park
Email: Send Email
Country: Japan
Website: https://timetreeapp.com
