sometimes singing the higher octave

how should I fix singing an octave high habit?

Hey, Aaron! You can check which octave you're singing in with a pitch app or chromatic tuner, and find the lower octave from there. 

You can use https://www.harpkit.com/online-tuner for reference pitches and https://tuner.ninja/ for a chromatic tuner. 

* Pitch apps: http://singtrue.co/ for a well thought out system; also check out https://www.guidingtech.com/55792/wonderful-ios-apps-musicians/


* Two similar apps (free to download and use most features - I wouldn't pay for the upgrade, though): https://apps.apple.com/us/app/learn-to-sing-perfect-pitch/id1409450884 & https://www.singsharpapp.com/

* For songs: use https://www.smule.com/ or a similar karaoke app that analyzes your pitch in real-time.

thank you!

You're welcome, Aaron! Best of luck!