Timetree
TimeTree, Inc. is a Japanese software company that operates a group-based shared calendar mobile and web application for families, couples, and teams, serving 75M+ registered users globally via freemium subscriptions, in-app advertising, and B2B marketing solutions, with an AI-agent platform being co-developed with SK Telecom.
- Company typePrivate
- Founded2014
- HeadquartersTokyo, Japan
- Headcount11–50
- GTM typeB2C
- OfferingSoftware
What Timetree does
TimeTree, Inc. (株式会社TimeTree) is a Japanese mobile and web software company founded September 1, 2014 (originally as JUBILEE WORKS, Inc., renamed in 2019) that operates TimeTree, a group-based shared calendar application. The core product enables families, couples, friend groups, schools, workplaces, and other organizations to coordinate schedules across multiple shared calendars with built-in communication features (Calendar Chat historically, comments, emoji reactions, stickers) and is distributed globally via the Apple App Store and Google Play, with a web version at timetreeapp.com. TimeTree reports 75M+ registered users worldwide (June 2026), 10M active users with 40% YoY growth (April 2026), and approximately 14 billion accumulated schedule entries that form a proprietary data asset underpinning its AI features.
The platform is built on a multi-client architecture (iOS, Android, web) hosted across AWS and Google Cloud, with AI features powered by third-party large language models from OpenAI, Groq, and Anthropic (including the Android Event Scan Function launched November 2024) and an in-progress integration of SK Telecom's Agentic Workflow 'A.' platform announced September 5, 2025 to deliver 'schedule-centered AI agent' capabilities. TimeTree's business model is freemium: a free ad-supported tier, a paid TimeTree Premium subscription at USD 4.49/month or USD 44.99/year (prices vary by region and currency), in-app advertising served via Moloco and proprietary networks, a TimeTree Ads / Marketing Solutions B2B division, and a Public Calendar Store marketplace for digital content (stickers, icons). Premium subscriptions are billed via Apple and Google in-app purchase.
The company closed a Series F funding round of approximately ¥3.2 billion (JPY) in November 2025 led by SK Telecom (JPY 2.2 billion / KRW 20.7 billion) alongside Atinum Partners, K2 Investment Partners, Mirae Asset Venture Investment, and Spotlight — earmarked for AI feature development, marketing, and global expansion, with an explicit long-term user target of 500M via SK Telecom's global telco alliance. TimeTree has offices in Tokyo (Shinjuku headquarters) and Seoul (Yeoksam-dong, supporting Korea–Japan AI agent market initiatives), is led by co-founder and CEO Yasuto Fukagawa and co-founder/CSO Cha-jin Park, and has built out a full executive team across CTO, CPO, COSO, CHCO, CFO, CDO, and Head of Marketing Solutions roles through 2024–2025.
Timetree firmographics
Firmographics- Name
- Timetree
- Legal name
- TimeTree, Inc.
- Website
- https://timetreeapp.com
- Company type
- Private
- Founded year
- 2014
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- TimeTree, Inc. is a Japanese software company that operates a group-based shared calendar mobile and web application for families, couples, and teams, serving 75M+ registered users globally via freemium subscriptions, in-app advertising, and B2B marketing solutions, with an AI-agent platform being co-developed with SK Telecom.
- Ownership category
- akta.pro rank
Timetree industry classification
Industry- Product category
- Shared Calendar Apps
- NAICS
- Direct Mail Advertising (54186)
- SIC
- Services-Advertising (7310)
- akta.pro primary industry
- Email, Calendar & Scheduling (BPAMAMAC)
Keywords
Where Timetree is headquartered
LocationHeadquarters
- HQ city
- Tokyo
- HQ country
- Japan
- HQ region
- Asia
Offices2 records
Markets served
Timetree business model
Business model- GTM type
- B2C
- Offering type
- Software
- Cost components
- Technology or R&D, Personnel, Infrastructure, Marketing or Sales, Operations
Revenue model
- TimeTree Premium subscription: Recurring paid subscription billed via the App Store and Google Play at $4.49 USD per month or $44.99 USD per year, with prices varying by region and currency. Premium tier removes ads, adds file attachments to events, vertical calendar view, prioritized/pinned events, and dedicated support. Auto-renewing billing handled by Apple/Google.
- In-app advertising: Free-tier users see in-app advertisements served through TimeTree's own and third-party ad networks (e.g., Moloco). The Premium tier's value proposition explicitly includes ad removal.
- TimeTree Ads / Marketing Solutions: B2B marketing solutions business operated by the Marketing Solutions Division (led by an executive officer), monetizing TimeTree's user assets and calendar advertising inventory for advertiser clients.
- Public Calendar Store digital content sales: Marketplace where users can purchase digital contents (images, icons, stickers) used within Public Calendars, on either a one-time or recurring-billing basis.
- Shared calendar app consumer market participation: TimeTree operates as a leading player in the broader Shared Calendar Apps for Couples market, which is projected to grow from US$75.97 million in 2025 to US$160 million by 2032 (11.4% CAGR).
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Subscription | Monthly | Free tier with ads and limited features; Premium tier at $4.49/month or $44.99/year |
| Subscription | Annual | Premium annual plan at $44.99/year (approximately 2 months free vs. monthly) |
| Freemium | Pay-as-you-go | Free tier (default for all users) |
| Other | Pay-as-you-go | Public Calendar Store digital content purchases (one-time or recurring) |
Go-to-market motion4 records
Distribution channels6 records
Marketing channels8 records
Timetree product offering
Product offeringCore offering
TimeTree is a group-based shared calendar mobile and web application that lets users create multiple calendars, invite other members, and coordinate schedules across families, couples, friends, schools, workplaces, and other groups. The core app is free to download with in-app advertising; a paid TimeTree Premium tier (USD 4.49 per month or USD 44.99 per year) removes ads and adds file attachments, a vertical hourly calendar view, pinned/prioritized events, and dedicated support. The company also operates a Public Calendar publishing service, a Public Calendar Store marketplace for digital content such as sticker packs, and a B2B TimeTree Ads / Marketing Solutions business.
Product overview
TimeTree is a unified calendar-sharing platform centered on its core TimeTree mobile and web app, which provides group-based shared calendars for families, couples, friends, teams, and other groups. The free core product is augmented by TimeTree Premium (the paid subscription tier offering ad-free usage, file attachments, vertical/weekly views, pin events, and dedicated support). Around this core, TimeTree operates the TimeTree Public Calendar (a sub-product for publishing calendars publicly on the web) and the TimeTree Public Calendar Store (a marketplace for purchasing digital contents such as sticker packs). Feature modules built on top include the TimeTree Album Feature (linking photos to events), the legacy Calendar Chat (terminated in December 2024), and the AI-assisted Event Scan Function for Android (released November 2024, powered by OpenAI/Groq/Anthropic LLMs). Separate business lines include TimeTree Ads (a marketing solutions business leveraging TimeTree's 70M+ user base) and the TimeTree Future Research Institute (the company's research arm). A strategic partnership with SK Telecom, signed in September 2025, is integrating "schedule-centered AI agents" built on SK Telecom's A. platform and Agentic Workflow technology to evolve TimeTree from a passive schedule manager into an active AI service with predictive, personalized scheduling capabilities.
Differentiator
Problem solved
Functional benefit
Brands
- TimeTree Premium: Subscription-based paid tier of the TimeTree calendar-sharing app, offering ad-free experience, file attachments, vertical (hourly) calendar view, pinned events, and dedicated customer support.
- TimeTree Ads
- TimeTree Future Research Institute (TimeTree未来総合研究所)
Products and services
- TimeTree Group-based shared calendar mobile and web application available on iOS, Android, and Web that lets users coordinate schedules across multiple shared calendars (family, hobbies, school, work) with invite links, comments, media, stickers, emoji reactions, virtual members, public calendar discovery, and notifications. Free to download with in-app advertising; 70M+ registered users worldwide.
- TimeTree Premium Paid subscription tier of the TimeTree app priced at USD 4.49 per month or USD 44.99 per year (region/currency dependent), offering an ad-free experience, file attachments to events (PDF, JPEG, PNG, HEIC, TXT, GIF, PPTX, DOCX, XLSX up to 10 MB each, max 3 files per event), vertical (hourly) calendar view, pinned/prioritized events, and dedicated premium support. Billing is auto-renewing via Apple App Store and Google Play, with a one-month free trial for first-time subscribers.
- TimeTree Public Calendar Publishing service that allows users and event organizers to release calendar content publicly on the web, invite third parties, edit and add detailed information, generate URLs and calendar images, and let other users follow or copy events into their own calendars. Governed by a dedicated Public Calendar Acceptable Use Policy and used by event organizers such as MUSIC AWARDS JAPAN to distribute official event schedules.
- TimeTree Public Calendar Store Marketplace within the TimeTree Public Calendar service where users can purchase digital content such as sticker images and icons from third-party sellers for use in Public Calendars, available on one-time or recurring billing bases.
- TimeTree Ads (Marketing Solutions) B2B marketing solutions business of TimeTree that leverages the platform's 70M+ user base to deliver calendar-based advertising and marketing services for partner brands and advertisers, including ad delivery via partners such as Moloco.
Quantifiable outcome
- 75+ million registered users worldwide (as of June 2026)
- +4 more outcomes
Companies that use Timetree
Customer profileNamed customers1 record
Segments6 records
Ideal customer profiles5 records
Timetree technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Integration4 records
AI capability11 records
Feature6 records
Timetree partnerships and signals
Strategic signalPartnerships
Six partnerships are on record, tiered core.
- MUSIC AWARDS JAPANcoreTimeTree, Inc. served as the Official Media Partner of MUSIC AWARDS JAPAN for the second consecutive year in 2026. As part of the partnership, TimeTree provided official event calendars in English and Japanese and promoted the event through in-app features to its 75+ million registered users worldwide during the festival held June 5–13 across Tokyo and Osaka, culminating at TOYOTA ARENA TOKYO.
- OpenAI, L.L.C.coreOpenAI is listed as a data processor for TimeTree, providing AI assistance functions such as scheduled scans. TimeTree shares user data with OpenAI under contractual obligations consistent with its Privacy Policy, with OpenAI processing personal data solely to provide the underlying model services.
- Groq, Inc.coreGroq is listed as a data processor for TimeTree, providing AI assistance functions such as scheduled scans under the same contractual framework as other AI model providers.
- Anthropic PBCcoreAnthropic is listed as a data processor for TimeTree, providing AI assistance functions such as scheduled scans under the same contractual framework as other AI model providers, supporting the schedule-centered AI agent vision described in the SK Telecom partnership.
- Amazon Web Services, Inc. (AWS)coreAWS is listed as a data processor for TimeTree, used to build the service system and operate the TimeTree platform infrastructure.
- Google Cloud (Google Cloud Japan LLC and Google Asia Pacific Pte. Ltd.)coreGoogle Cloud Japan LLC and Google Asia Pacific Pte. Ltd. are listed as data processors for TimeTree, used to build the service system; the TimeTree mobile apps are distributed via Google Play.
Scale indicators14 records
Recent moves4 records
Expansion highlights6 records
Timetree competitors and assessment
Company assessmentDirect peers
- FamCal: FamCal is a free shared family calendar app offering color-coded calendars, to-do lists, and family messaging. It targets the same family-organization use case as TimeTree and appears in the same third-party buying guides, making it a relevant direct peer.
- FamilyWall: FamilyWall is a shared family organizer app combining a shared calendar with shopping lists, meal planning, and family messaging. It directly competes with TimeTree in the same shared-calendar-for-families category and is frequently listed alongside TimeTree in 'best family calendar app' guides.
- Cozi: Cozi is a leading family organizer app that includes a shared family calendar, to-do lists, and meal planning. It is repeatedly grouped with TimeTree in industry buying guides for the best family calendar apps, making it the closest direct peer in shared calendar for families and couples.
- GroupCal: GroupCal is a shared calendar app designed for groups, teams, and communities to coordinate schedules together. It competes directly with TimeTree's core group-based calendar sharing feature set and appears in the same family/group calendar buying guides.
- Skylight Calendar: Skylight Calendar is a shared family calendar offered both as a touchscreen device and as a mobile app. It targets the same shared-calendar-for-families use case as TimeTree Premium, frequently appearing alongside TimeTree in family calendar app rankings.
Broad incumbents
- Google Calendar: Google Calendar is the dominant free calendar app, bundled with Gmail and Android. It competes broadly with TimeTree for any calendar use case but does not focus on social/shared-group scheduling as a differentiator; serves as the incumbent that TimeTree must differentiate against.
- Microsoft Outlook Calendar: Outlook Calendar is the calendar component of Microsoft 365, widely used in workplace and education settings. It overlaps with TimeTree's workplace and schools user segment but is a broad productivity-suite incumbent rather than a social/group-sharing specialist.
- Apple Calendar (iCal): Apple Calendar is the default calendar app shipped with every iPhone, iPad, and Mac. It is a broad incumbent that benefits from zero-cost OS bundling and competes with TimeTree for individual and family scheduling on iOS.
Emerging players
- Notion Calendar: Notion Calendar (formerly Cron) is a Notion-owned calendar app focused on productivity and time blocking. It overlaps with TimeTree on calendar UX but is positioned for individual productivity rather than group sharing, making it a partial-overlap emerging player.
- Calendly: Calendly is a leading scheduling and meeting-booking platform focused on appointment scheduling for sales and customer-facing teams. It overlaps with TimeTree in the broader scheduling category but targets a distinct professional use case rather than family/group sharing.
Market position
Strengths1 record
Weaknesses1 record
Competitive moat5 records
Key risks7 records
Key highlights7 records
Customer concentration
Timetree social profiles
Digital presenceTimetree compliance and trust
Trust signalCompliance2 records
Timetree financial estimates
Financial estimateRevenue estimate
Valuation estimate
Timetree leadership team
Management profileNumber of profiles
Profiles9 records
Timetree subsidiaries and ownership
Company hierarchySubsidiaries1 record
Timetree funding detail
Funding detailFunding overview
Funding rounds7 records
Investors20 records
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Timetree M&A and investment
M&A and investmentM&A1 record
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Timetree
What does Timetree do?
TimeTree is a group-based shared calendar mobile and web application that lets users create multiple calendars, invite other members, and coordinate schedules across families, couples, friends, schools, workplaces, and other groups. The core app is free to download with in-app advertising; a paid TimeTree Premium tier (USD 4.49 per month or USD 44.99 per year) removes ads and adds file attachments, a vertical hourly calendar view, pinned/prioritized events, and dedicated support. The company also operates a Public Calendar publishing service, a Public Calendar Store marketplace for digital content such as sticker packs, and a B2B TimeTree Ads / Marketing Solutions business.
Is Timetree a public or private company?
Timetree is a private company. It is classified as venture growth investor backed and is currently operating.
When was Timetree founded?
Timetree was founded in 2014. It employs 11 to 50 people.
Where is Timetree based?
Timetree is headquartered in Tokyo, Japan, in the Asia region.
How does Timetree make money?
Five revenue lines are on record. TimeTree Premium subscription is the primary driver. The others are in-app advertising, timeTree Ads / Marketing Solutions, public Calendar Store digital content sales and shared calendar app consumer market participation.
Who are Timetree's main competitors?
Direct peers on record are FamCal, FamilyWall, Cozi, GroupCal and Skylight Calendar. Broad incumbents are Google Calendar, Microsoft Outlook Calendar and Apple Calendar (iCal). Emerging players are Notion Calendar and Calendly.
Does Timetree have an API?
No public API is recorded for Timetree.
What industry is Timetree in?
Timetree's product category is Shared Calendar Apps. Its primary akta.pro industry code is BPAMAMAC, Email, Calendar & Scheduling. Its NAICS code is 54186 and its SIC code is 7310.