Overview of the iAPS system components: smartphone running the client app, Dexcom G5/G6 CGM, and Tandem or Insulet insulin pumps. The app main screen provides access to pump, CGM, bolus, user, event, and activity pages along with graphical display of glucose and insulin history, current CGM and its trend, and IOB values. CGM, continuous glucose monitor; iAPS, interoperable artificial pancreas system; IOB, insulin-on-board.