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One Calendar icon

How much does One Calendar earn?

iOS app from Code Spark · Productivity

ML forecast ★ 4.8 · 20K Free

~1.4K/mo

ML revenue forecast. Calibrated against 2218 apps in this category.

Confidence band
±15%
High — many comparable apps with verified data

At a glance

What the app looks like

Live screenshots from the App Store, captured by our snapshot worker. Tap any image to enlarge.

One Calendar screenshot 1 One Calendar screenshot 2 One Calendar screenshot 3 One Calendar screenshot 4

One Calendar's revenue trajectory

Forecast revenue from snapshot history. Last 2 months.

Where One Calendar sits in Productivity

Revenue distribution of 2218 comparable apps. One Calendar highlighted.

One Calendar vs comparable apps

Revenue trajectory side-by-side. Bold = One Calendar, ghosted = peers.

App spec

Version
6.901.0
Last update
Dec 12, 2025
Launched
May 01, 2018
Min OS
14.2
Rating
12+
Price
Free
Monetization
Free
Languages
CA, CS, DA, NL +12

What One Calendar actually does (from App Store listing)

The most popular app to view all your calendars like Google, Live, Outlook, iCloud, Exchange, Office365, Yahoo, Nextcloud, Synology, GMX, Mailbox.org, ownCloud and more. OneCalendar integrates all your calendars into an easy-to-read overview. View and manage all your appointments, events and birthdays. OneCalendar is available on all platforms.

Comparable iOS apps

The five apps in Productivity with the closest revenue to One Calendar. Click any to see its detail page.

AppRevenueRatingRatings
IGES & STEP Viewer icon IGES & STEP Viewer 1.4K ★ 3.0 8
Google Keep – Notizen & Listen icon Google Keep – Notizen & Listen 1.4K ★ 4.6 29K
Voice Time - Говорящие часы icon Voice Time - Говорящие часы 1.4K ★ 5.0 3
The Magic Highlighter icon The Magic Highlighter 1.4K ★ 3.9 20
When — Tägliche Erinnerungen icon When — Tägliche Erinnerungen 1.4K ★ 4.3 7
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How we calculated this

Each forecast combines App Store rating, ratings count, monetisation model, pricing tier, IAP signals and ad-supported flag. The base estimate is then multiplied by a per-category scaling factor learned from apps with founder-verified MRR. Every number on this page comes from public APIs and bumetric's own snapshot history.

Full methodology covers input variables, accuracy bands per category and how we treat apps without comparable anchors. See also the live data on One Calendar's tracker page for current rating, reviews and snapshot timeline.

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