Any of you mamas use the owlet sock and if so do you have to have the base or can you just use it with your phone through bluetooth and the app? I've been looking into getting one because my son gave me a scare yesterday and just stopped breathing on me so I called an ambulance and rushed him to the hospital. They did bloodwork, chest xrays, and took a urine sample while he was at the hospital but couldn't find anything wrong so they couldn't explain why it happened so i think the sock will help give me a peace of mind while he sleeps at night. But I don't have $300 to buy everything but I found out I can get the sock and charger for about $55 but idk if it'll work without the base. Thank you in advance.

This is my baby boy in the hospital yesterday. It was very scary.