I've been eyeing the FitBit - either Alta HR or the Charge 2. Not sure I'm keen on the Ionic - smaller is better - but the blood sugar monitoring is a very attractive option.

re Dexcom G5
' Never make a decision regarding food, insulin or activity based on the Dexcom values. What it does is beep you to do a meter reading. Good if you're unaware especially of a low.... the kit it clearly states that this device should not be used in place of your standard blood sugar monitoring procedure'