Oximeter - Track Oxygen SpO2

I couldn’t figure out how to use it. It makes you pay for it without being clear. Not user friendly. Do not purchase this app.

App didnt tell me it was a charged subscription when downloaded until opened it, found out it wanted to charge me and i tried to quit and delete because it didnt suit my needs. It charged me for a subscription Apple refused to refund me for . They didnt care i didnt mean yo authorize payment, just quoted the terms of sale. Never knew all sales were final now, ive gotten refunds before, contract says if it doesn't work right. App people never followed up after asking why i cancelled, apple refected bbb complaint. Dont buy apple apps suprise charges are not refunded

It won’t do much without a paid subscription. I could t even tell if it would work with my oximeter