VO Calendar is a Productivity app developed by Tom van Zummeren, available on the App Store. It was first released on Jan 31, 2013.

Is VO Calendar successful?

MRRBeam rates the success of VO Calendar 18/100 (early stage). The success score combines rating volume, chart position and average rating.

When was VO Calendar last updated?

VO Calendar was last updated on Nov 22, 2023 (version 1.2.5).

What are alternatives to VO Calendar?

Similar Productivity apps tracked by MRRBeam include ChatGPT, Muse from Meta, Google Gemini, Gmail - Email by Google and Grok AI.

Is there room to build a competitor to VO Calendar?

MRRBeam's opportunity score for VO Calendar is 10/100. Limited opening: an older app, little observable demand and a strong 4.6★ rating.

VO Calendar

Tom van Zummeren

Store data observed Oct 12, 2026 · From public App Store data · How we score apps

Productivity
App Store
United States
4.68 ratings
Paid $3.99
Updated 2 yr ago
Observed

App Store

Ratings

Observed

84.6★ average

Chart position

Observed

—Not on the top charts

90-day growth

—not enough history yet

Opportunity score

AI-derived

10/100Weak · low confidence

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About VO CalendarObserved

VO Calendar is a Productivity app by Tom van Zummeren on the United States App Store. Released Jan 31, 2013; last updated Nov 22, 2023 (version 1.2.5). VO Calendar costs $3.99 to download.

As of Oct 12, 2026, VO Calendar has a 4.6-star average rating from 8 ratings on the United States App Store. MRRBeam rates the success of VO Calendar 18/100 (early stage).

NOTE: Can only be used together with VoiceOver (for blind and partially sighted people). VO Calendar is a weekly calendar specifically designed to be used with VoiceOver. The result of this VoiceOver-only design is not only a smoother navigation through the app.

From the App Store listing

Success score: 18/100 Early stage
In Productivity: Outside the top 100
Chart position: Not on the top charts
Developer: Tom van Zummeren

App Store screenshotsObserved

VO Calendar: common questions

What is VO Calendar?: VO Calendar is a Productivity app developed by Tom van Zummeren, available on the App Store. It was first released on Jan 31, 2013.
How is VO Calendar rated?: VO Calendar has a 4.6-star average rating from 8 ratings on the United States App Store as of Oct 12, 2026.
How much does VO Calendar cost?: VO Calendar costs $3.99 to download.
Is VO Calendar successful?: MRRBeam rates the success of VO Calendar 18/100 (early stage). The success score combines rating volume, chart position and average rating.
When was VO Calendar last updated?: VO Calendar was last updated on Nov 22, 2023 (version 1.2.5).
What are alternatives to VO Calendar?: Similar Productivity apps tracked by MRRBeam include ChatGPT, Muse from Meta, Google Gemini, Gmail - Email by Google and Grok AI.
Is there room to build a competitor to VO Calendar?: MRRBeam's opportunity score for VO Calendar is 10/100. Limited opening: an older app, little observable demand and a strong 4.6★ rating.