Share when you are free, without showing what you are doing
Alto Calendar builds one Busy/Free calendar out of the calendars you already keep. It carries only the blocks: when you are busy, and when you are not.
Only the times
No titles, no locations, no guests, no notes. Event details never leave your device: only the blocks are shared.
Shared the Apple way
Share that one calendar with your partner, your family or a friend, using Apple's own calendar sharing. They see when you are free.
When everyone is free
They can make one too, so you can both see when everyone is actually free.