To try to solve the problem caused by the known bug on Android 4.4.2, we borrowed Samsung S5 mini. Here’s the result:

The oximeter and the StressLocator application worked with the device without problems; most likely because it was fully patched and updated. So we recommend to update your S5’s firmware. Then the devices and application should work correctly.

Unfortunately we haven’t had an opportunity to try the oximeter with bluetooth-bugged-device. Due to that we are unable to offer any version of StressLocator running on the old firmware.