I’ve completed a large new app earlier this week, pretty excited about it, trying now to get the app into BETA test, and looking forward to working with Shopify, but the app runs on an https, secure server and it cannot (very large third party will not sign off on this) run in an frame.
Development started in February, so this pre-dates the frame. I had emailed Shopify on February 12th I was going to work on this.
I’ve opened tickets with support on this issue (643277) and (642362) and looking forward to a response.