@SobeiT Yes, NovoPen Echo is available in the US. I did the same thing due to 1/2 unit dosing, but decided a pump was in my future. The pen works with cartridges, so if you’re getting one, make sure the cartridges get ordered at the same time. I was disappointed with the split body of the pen for loading cartridges, seemed a little flimsy to me, relatively easy to break apart.
Ref your Apple Developer account, it sounds like you went further than necessary. To build Loop, iAPS, and Trio, you do need an account, but unless you’re developing and selling other apps, there’s no reason to submit tax documents and the like. All you need is the account that runs $99, do NOT “submit” the apps for Apple review for sale…they won’t pass them anyway!
Also, the reminder you advocate for insulin dosing: Couldn’t you use one of the Dexcom settings to set the alert level you want? It wouldn’t say, “Hey, you want to dose now!”, but would seem to serve the purpose. Alternately, using Loop, iAPS, or Trio, one of their alerts might serve the same purpose.
Lastly, yes I use Apple Pay for my developer account with auto-renewal.