ONE Calendar — All in one
junichiro ono Productivity iPhoneiPadiPod touch
ONE Calendar — All in one is a free Productivity app for iPhone and iPad by junichiro ono. Requires iOS 15.0. Updated September 13, 2026.
- Price
- Free
- on the App Store
- Size
- 6 MB
- Age 4+
- Updated
- Sep 13
- 2026 · v1.0
Screenshots
About ONE Calendar — All in one
One calendar. Every commitment. ONE is a smart scheduling app built for people who manage multiple calendars across work, business, and personal life. Whether you're an entrepreneur, freelancer, consultant, or part of multiple teams, ONE gives you a single view of your availability by syncing your calendars from Google Calendar and Microsoft Outlook. Stop switching between calendars. Stop double-booking. Spend less time coordinating schedules and more time getting work done. Key Features • Sync multiple calendars Connect Google Calendar and Microsoft Outlook to manage all your schedules in one place. • See your true availability ONE automatically combines your calendars so you always know when you're actually free. • Schedule with confidence Share your availability and coordinate meetings without manually checking multiple calendars. • Built for multi-project professionals Perfect for entrepreneurs, freelancers, consultants, investors, creators, and anyone balancing multiple commitments. Why ONE? Modern work isn't tied to a single company or a single calendar anymore. ONE helps you stay organized across every project, team, and organization—so your time stays aligned wherever you work. Download ONE and make scheduling simple.
App privacy
The developer, junichiro ono, reported these privacy practices to Apple.
Data Linked to You
The following data, which may be collected and linked to your identity, may be used for the following purposes:
- Contact Info: Email Address, Name, Other User Contact Info
- User Content: Customer Support
- Identifiers: User ID, Device ID
Used for: App Functionality
Alternatives to ONE Calendar — All in one
Looking for apps like ONE Calendar — All in one? Here are 6 similar apps on the App Store. The highest rated is One Tasks (4.8/5), and all 6 are free to download.
-
Brainrot: Focus & Screen Time
2.0
-
OneCalendar: All in AI Planner
4.0
-
Black Hat MEA
1.5
-
Outreach.io
3.5
-
Pine Assistant
4.4
-
One Tasks
4.8
| App | Rating | Price | Last updated | Compare |
|---|---|---|---|---|
| ONE Calendar — All in one | – | Free | September 13, 2026 | |
| Brainrot: Focus & Screen Time | 2.0 / 5 (1) | Free | Sep 14, 2026 | Compare |
| OneCalendar: All in AI Planner | 4.0 / 5 (1) | Free | Sep 16, 2026 | Compare |
| Black Hat MEA | 1.5 / 5 (2) | Free | Oct 25, 2026 | Compare |
| Outreach.io | 3.5 / 5 (26) | Free | Oct 8, 2026 | Compare |
| Pine Assistant | 4.4 / 5 (148) | Free | Oct 30, 2026 | Compare |
| One Tasks | 4.8 / 5 (276) | Free | Nov 2, 2026 | Compare |