VO Calendar
by Tom van Zummeren
- Productivity
- Paid
- Zombie
- Rating
- 4.6
- 5 ratings · UK storefront
- Last update
- Nov 22, 2023
- Version 1.2.5
- Size
- 1 MB
- Category
- Productivity
- Tracked since
- Oct 10, 2026
Estimated revenue
A model estimate with a likely range, not a reported figure.
No estimate. Apps outside the grossing charts, and some countries, have no reliable rank-to-revenue curve, so we show nothing rather than a guess.
How this estimate is made
Rank: we take the app's best Top Grossing rank on the latest chart day. Category ranks are converted into an equivalent overall rank, because a #10 in Finance earns far less than a #10 overall.
Curve: that equivalent rank is read off a rank-to-revenue curve anchored on public company revenue and market-data reports for the US iPhone App Store.
Country: the curve is scaled per country (Japan is roughly a third of the US, Türkiye under 1%). Where we have no scale, such as China, there is no estimate.
Range: the likely range widens with country, category and chart depth. It is a plausible span, not a statistical confidence interval.
Not included: ads, payments outside the App Store, and any difference between gross sales and what the developer keeps. Low confidence means indirect data; medium means several independent sources agree.
Full methodScreenshots
As shown on the App Store listing.
About this app
Text from the App Store listing.
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. It also makes it possible for the VoiceOver speech to give smart summaries depending on the context. This prevents you from having to go through each event
Individually.
Existing events are automatically synchronized. If you prefer not to type, you can record voice memos instead.
You can use VO Calendar with the VoiceOver gestures you are used to.
However, there is an even faster way. With the screen being split into two halves you can scan the right half of the screen with your right thumb. A single tap with your left thumb then is enough to activate the concerning function. After getting used to you will find out this helps you to browse through your calendar even quicker.
The left bottom always contains the ‘Return’ button so you can still reach it with your right thumb (being an L-shaped layout). At the top left you can always find a summary of the current screen content. In case you are left-handed you can swap left and right.
Note: If you have multiple calendars configured, VO Calendar will show all concerning events. New events will be assigned to your iPhone’s default calendar. Change the default calendar in: Settings > Mail, Contacts, Calendars > Default Calendar.
VO Calendar is developed in cooperation with Royal Dutch Visio, Centre of Expertise for blind and partially sighted people (www.visio.org).
We appreciate your opinion and are always interested in hearing from you. Feel free to leave your feedback in the form of a review or contact us at: [email protected]
In case you have problems recording a memo:
- Hold one finger on 'Record memo' button
- Use other finger to tap on screen
(instead of first focussing on the button and then double tap)
What’s new
Release notes for the latest version, as written by the developer.
Updated for iOS 17.
Rank history
Daily position in the Netherlands charts. #1 is at the top.
- Best rank
- #15
- Current rank
- #15
- Days charting
- 7 of 7
On the charts today
Small & simple score
How realistic it is for a small team to build something like this.
72/100
Not flagged as small & simple
- Developer size40% · 25
Developer: 3 apps on the charts
- Audience size100% · 20
Ratings: 5
- App size100% · 10
Size: 1 MB
- Price model100% · 15
Price model: paid
- Demand proof55% · 30
Best rank #15, 3 countries
An indicator, not a fact. We can't see team size. Calculated Oct 25, 2026 · method i2
How the score worksVersion history
- 1.2.5LatestReleased Nov 22, 2023