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Here is the app: http://www.knocktounlock.com/

Which leads me to believe the prior threads on this topic(CoreMotion updates in background state) are no longer accurate because it does indeed work reliably even when your phone is in sleep mode and locked.

Community
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ChuckKelly
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1 Answers1

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Based on their webpage, this is how it works. There is an app on the Mac. When you wake up the Mac screen, before unlocking, the Map app sends a BLE notification to the unlock app on the phone. BLE notifications can start iphone apps in the background. The iPhone app starts monitoring the accelerometer and send a BLE notification back to the Mac when you knock.

progrmr
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  • My client has a app that imports your gcal and auto schedules your to-do list in the gaps of your schedule. Our vision for giving our app a edge was to add a feature that enables users to knock on their device even if its sleeping or they have another app open and they would get a push notification telling them what they are suppose to be doing right now.Is this possible? – ChuckKelly Apr 20 '16 at 04:06
  • that sounds like a brand new question, not a comment. but the answer is no. – progrmr Apr 20 '16 at 05:51