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75
BU Score
Strong

BusyCal: Kalender & To-Dos

4.7 ✍️ Editor
✍️ bumetric analysis

BusyCal: Kalender & To-Dos is an iOS app from Busy Apps FZE in the Productivity category, currently rated 4.7★ across 4,355 ratings. Initial signal reads as mixed reviews: supporters praise core features while critics cite stability and value gaps.

Our BU Score puts it at 75: Strong (healthy traction). For a Productivity app, that means healthy traction.

Track changes month-over-month in the Performance section below: live snapshot history and revenue forecast included.

📊 Performance Tracking LIVE

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Reviews
Forecast Revenue / mo
Snapshots tracked
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💰 Forecast Revenue / mo

MODEL
Revenue forecast computed from BU's 234 trigger model on each snapshot. Calibrated against ground-truth from 58 verified-revenue apps.
🔬Forecast Breakdown — Why This Estimate?Top 12 of 12 triggers
Our ML model uses 200+ signals from public data. These are the most influential for this app:
Paid app ($0.00)METRIC
+$2,800
Excellent rating (4.7★)METRIC
+$2,200
worth every pennyREVIEW
+$2,000
bugsREVIEW
−$1,800
5 starREVIEW
+$1,800
excellent appREVIEW
+$1,500
Low install base (4,355 ratings)METRIC
+$1,500
Mature app (9y old)METRIC
+$1,500
Multilingual (10 languages)METRIC
+$1,500
highly recommendREVIEW
+$1,400
slowREVIEW
−$1,200
support teamREVIEW
+$900
METRIC = structural app data · REVIEW = mined from user reviews · ✓ VERIFIED = Stripe-verified anchor (TrustMRR)

📈 Reviews Growth

LIVE
Cumulative review count from first BU snapshot. Each point = a tracked update.
💚Sentiment Over Time↑ green = positive · ↓ red = negative
Apr 25
May 25
Jun 25
Jul 25
Aug 25
Sep 25
Oct 25
Nov 25
Dec 25
Jan 26
Feb 26
Mar 26

⭐ Rating Trend

LIVE
Average rating evolution. Updates with each new review batch.

🗓️ Snapshot Timeline

HISTORY
Each bar shows a tracked update and the metric delta from the previous snapshot.
App Specs
🔐 Own this app? Claim & verify MRR →
💾 108 MB🔞 4+📱 iOS 15.6+🔖 v6.6.1🔄 updated 2w ago🌐 NL, EN, FR, DE, IT +5📂 Productivity💰 Paid🚀 Launched 2016 (9y old)

📝 About this app

BusyCal is a powerful, flexible and an extremely customizable calendar app for managing busy schedules, events and tasks.

BusyCal's unique features include natural language input, customizable calendar views, an integrated to do list, meeting scheduling, travel time, maps integration, tags, alarms, search, weather, moons, birthdays, anniversaries, graphics and more.

BusyCal provides reliable support for iCloud, Google Calendar, Google Tasks, Exchange / Microsoft Outlook, Office 365, Todoist and other CalDAV servers, enabling you to sync and share calendars with other Mac and iOS devices running BusyCal or the built-in Calendar app.

CALENDAR VIEWS

• Display your calendar by Month, Week, Day, List or Year.
• Pinch and zoom to control the number of weeks shown per month, and days shown per week.
• Customize the calendar appearance including calendar colors, weather, moons, birthdays, anniversaries, event times, week numbers and more.

CALENDAR SETS

• Manage different, named collections of calendars
• Quickly switch between different Calendar Sets
• Assign different default calendars to different sets
• Create new sets based on existing collections

PASSWORD PROTECTION

• Enhanced privacy with the option to lock all your calendar sets or just the ones you choose

WIDGETS

So. Many. Widgets
• Upcoming
• Event List & Calendar
• Calendar & Heatmap
• Today's Date
• Next two days
• This week
• Next two weeks

EVENTS

• Create events manually or automatically using natural language.
• Choose from a wide range of attributes to display when viewing or editing events including travel time, time zones, attendees, contacts, tags, maps, last edit time, and more.
• Add tags to events to track projects and important events.

TASKS

• Tasks are displayed directly in the calendar and carry-forward until completed.
• Tasks can be undated, or scheduled to occur on a specific date or time.
• Tasks can be scheduled to repeat daily, weekly, monthly, etc.
• Tasks can be sorted and filtered by date, priority, calendar or title.

JOURNALS

• Journal entries you create are displayed directly in the calendar as all-day events
• Journal can be scheduled to repeat daily, weekly, monthly, etc.

TRAVEL TIME, LOCATIONS & MAPS

• Create and use Favorite Time Zones
• Supports Location Services for adding locations to events.
• Supports both Apple Maps and Google Maps for driving directions.
• Travel time allows you to block out time to travel to an appointment.
• Alarms can warn you in advance of travel time when it's time to leave.

PERSONALIZATION

• Display Birthdays and Anniversaries, including birthday age and anniversary number.
• Display a live 10-day weather forecast.
• Display phases of the moon.
• Display graphics created in BusyCal for macOS.

SYNC & SHARE CALENDARS

• Sync and share calendars with iCloud, Google Calendar, Exchange, Outlook, Office 365, Todoist, Fruux, Yahoo, Kerio, Zimbra, Oracle, OwnCloud, Confluence, macOS Server, SabreDAV and other CalDAV servers.
• Sync with other Mac and iOS devices running BusyCal or the built-in Calendar app.
• Add Zoom, Webex, GoTo Meetings accounts to create meetings directly from the app

MORE

• Year Overview and Highlights
• Receive Inbox notifications of meetings and changes to events on shared calendars.
• Search your calendar for past and future events and tasks.
• Set default settings for events, tasks and alarms.
• Dark Mode

🆕 What's New · v6.6.1

· [NEW] Export your calendars as CSV from Settings Export as CSV, to be used in spreadsheets or other apps.
· [NEW] Travel time in blocking events. A new Advanced preference lets time-blocking events on other calendars start earlier to cover an event's travel time. See Settings Advanced.
· [NEW] Automatic time-blocking rules (per calendar) now sync across all copies of BusyCal on macOS and iOS. Editing rules is currently available on BusyCal's mac version only.
· Improved compatibility with third-party CalDAV servers
· Further improvements to automatically updating linked time-blocking events when the main event changes during sync
· Fixed a bug with Task regeneration style 'completion date'
· Fixed a bug with timed tasks would get excluded from the upcoming complication
· Ongoing stability and performance enhancements

Profile & Insights

Everything we know — and don't — about this app and its company.

Identification

App name
BusyCal: Kalender & To-Dos
Developer
Busy Apps FZE
Bundle ID
com.busymac.BusyCaliOS
App Store URL
Open in App Store
Category
Productivity
Content rating
4+
Languages
NL, EN, FR, DE, IT, JA, KO, PT, ZH, ES

Company

Website
www.busymac.com
Tagline
Not found
Description
Not found
Founded
Not found
HQ / Address
Not found
Employees
Not found
Logo
Not found

Revenue

Verified revenue / mo
Not found
AI revenue estimate / mo
Not found
AI annual estimate
Not found
ML model estimate / mo
$30.4K/mo
Top-grossing rank
Outside top 100 in US Productivity
All-time revenue
Not found
Pricing
Not found

Founder

Name
Not found
X / Twitter
Not found
LinkedIn
Not found
GitHub
Not found
X followers
Not found
Public statements
Not found

Funding

Total raised
Not found
Last round
Not found
Investors
Not found
Crunchbase
Not found
AngelList
Not found

Press & Links

Articles found
Not found
Listed on
Not found
Blog
Not found
Press / News
Not found

Contacts & Socials

Socials
Not found
Email
Not found
Phone
Not found
Contact page
Not found
About page
Not found
📈Ratings growth4,355 ratings+42% lifetimeShow 3-year history estimate ▾May 2023Jun 2025May 2026
Tracked (56 weeks) Pre-tracking estimate (35 weeks) · model-based, ±5% noise · anchored to release date and current value
🌍Geographic ReachNot ranked
This app is currently outside the top 100 grossing in all 9 countries we monitor (US, UK, DE, FR, JP, CA, AU, BR, IN). Niche or new apps often launch this way — popularity rankings appear once daily revenue clears the regional threshold.
Profile is built from iTunes Lookup + developer site scrape + ML revenue model. Empty fields show "Not found" — additional sources (Crunchbase, X, IndieHackers, Acquire.com) coming.

Similar apps in Productivity

Full revenue analysis
Read the article-style breakdown for BusyCal: Kalender & To-Dos: category rank, percentile, growth signal, comparable apps, and how the forecast is calibrated against verified-MRR anchors in this niche.
Read deep-dive →