Riff Calendar

About

Riff is an iPhone calendar that replaces separate month, week and day views with one continuous zoom from half a year down to a single day. Events are created by holding a free slot and rescheduled while other events stay visible. It works directly on calendars already on the phone, with no account or server. The author states it is free for three weeks, then $39.99 once or a subscription at $1.99 a month or $19.99 a year.