I google like this
Tempo Calendar Alternatives.
First hit is http://appcrawlr.com/app/related/1193795
Calendaring tends to be full of love and hate. I've seen folk love one and someone hate the same title. As such I've come to the conclusion I may never find a replacement for folk. but I can share how I search.
Tempo calendar app has been sold. Loved the app. They are shutting down as of 6/29. Your advice on next best app to replace it.

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