CategoryCal

This app allows to add multiple uniform non-repeating events and remove them with just a few taps, so use it cautiosly. It was originally created to make daily schedules for groups of consumers, but other use cases are possible. Events in this app start and end at exact hours.

The basic scenario is like this:
1. Setup a public calendar on one of the calendar platforms (e.g. Google Calendar).
2. Add your account on that platform to your iOS device in Settings->Calendar->Accounts->Add Account.
3. Select the calendar in this app and edit its events.
4. Publish ICS link to the calendar and instructions for your consumers on your website. Or use other communication channels.
5. Consumers will subscribe to your calendar and will be able to see its events (e.g. availability of your services). They can be also instructed on how to setup a calendar widget for convenience.