For reference setting, I have a Dexcom 6 and use pens for insulin. My A1c is good but not great, meaning under 7.0 but not under 6.0, and about 70% time-in-range (TIR). If you want even tighter control, you might want others’ advice, but here is mine.
I use:
- Dexcom 6 app for direct information on my Samsung phone
- Dexcom Clarity for keeping an eye on my trends
- A Samsung Pro 5 watch (my mg/dl appears as a complication)
- Two additional apps to be able to see my numbers on the watch (linked below)
Seeing my numbers on my watch is essential, and during a transitional period when I bought the watch and was unable to see my numbers, my blood sugar control suffered.