Not worth it

After comparing results with a clinical apparatus, my RHR was around 10 beats lower using this app, and saturation was at 99. Tried it on a TB patient who was also asthmatic the RHR was again about 10 beats lower but saturation was 7% higher(99% using app, and 92%) compared to clinical apparatus. Want my money back.

Mnatiq about Pulse Oximeter - Heart Rate and Oxygen Monitor App, v2.0.1