What calendars does theSkimm App integrate with? December 11, 2019 19:17 Updated Glad you asked. theSkimm App is compatible with iCal and Google Cal. But we have a lot more up our sleeves. Stay tuned. Related articles How do I get the Calendar? What does “The Big Stuff” mean? Can I customize my calendar? Can I invite my friends? What will happen to my subscription to theSkimm App on Android after August 31st?