How does the PIE connect to smartphone app? Bagel Labs May 14, 2018 09:54 Updated Follow PIE can be connected to smartphone via Bluetooth. To sync, please refer to Sync category to find out more. https://bagel-labs.zendesk.com/hc/en-us/articles/360004229893-How-do-I-connect-PIE-to-its-smartphone-app- Related articles How do I connect PIE to its smartphone app? Is PIE waterproof? How long does it take to fully charge PIE? PIE's display won't turn on I am getting different results whenever I take waist circumference measurements. Why is that? Comments 0 comments Please sign in to leave a comment.