Great idea
Response from developer
thank you for finding the issue. working on it now.

Easily create a shared calendar that shows your availability as busy or free. Share this summary calendar with others to let them know when you're available, or view their availability to coordinate plans.
3.5
November 1, 2026
- Small improvements under the hood.
$2.99
A thank you
A thank you. Alto Calendar stays free.
thank you for finding the issue. working on it now.
alto.calendar creates a summary calendar showing your busy and free times, compiled from all your existing calendars. This allows you to easily share your availability with others or see theirs.
By sharing a consolidated busy/free calendar, you and your contacts can quickly see when everyone is available, simplifying the process of finding a time to meet or connect.
Currently, alto.calendar is available for iPhone devices.
Yes, alto.calendar is completely free to download and use, with no in-app purchases or advertisements.
The app was last updated on December 2, 2024, with version 1.13. This indicates active development and regular improvements.
alto.calendar has an age rating of 4+, making it suitable for a wide range of users.
Based on its rating of 5.0 stars from 2 reviews, users likely appreciate its straightforward functionality for sharing availability and its ease of use.
No, alto.calendar is ad-free, providing an uninterrupted user experience.