I am learning Greek at the moment, with codex I was able to produce a microsite and a prompt that can generate a lesson per day. It's pretty cool as it does both TTS and speach to text so I can actually practice generated conversations with myself.

Calorie Tracking:

Now I just send a picture or text into a Telgram channel, agent pics it up classifies it as "food info" sends to another agent for calculating calories either a best effort guess or if I've sent nutritional information in the pic reads it and follows up asking for portion size.

Workout Tracking:

Same telegraph channel, again just free text of what I've lifted/exercises I've done and it all gets stored. There's then an agent that uses this and the calories submitted to see if I am on track to reach my goals or offers tweaks as I go.

Reminders:

Same telegraph channel ( there's a theme here ) send reminders in, it's stored and a scheduler runs that sends me a push notification when the even is due. It's simple but just way better than googles offering

Then there's some other personal assistant stuff, for example I get a lot of emails from my kids school that contains important dates/requests for money, before this was a PITA to extract, now I just have an agent that reads the emails/extracts the documents and scans them for relevant information and adds to my calendar, or sends me payment reminder requests until I've paid them.

I'm pretty early days but I can just see this list expanding.