4 types of sensors for short or long recordings:

• IOS Camera sensor (short records)

• Berry BM1000C (short records)

• KYTO HRM-2935 earclip (short records)

• Polar chest (short & long records)

All of these sensors can be used for short recording (less than 30 minutes):

mainly designed for coherence and breath training.

Long recording (up to 8 hours and a half), can only be done with the use of a Polar chest strap or a compatible Bluetooth chest strap device.

The pressure wave (related to the Mayer wave or Cranio-Sacral wave) can only be displayed with the Berry BM1000C finger sensor (best accuracy - available January 2017),

the iHealth finger sensor (less accuracy - much sensitive to movements)

or the Camera sensor (less accuracy - much sensitive to movements).

Short Recording options of the app has been designed for quite & calm recordings (as slow breath trainings, heart coherence, relaxing or meditating states). If you want to make a recording while moving, it is better to use a bluetooth Polar Chest Strap.

The light sensors devices (iHealth finger sensor, the earclip sensor and the ios camera)

are very sensitive to movements of the sensor:

they need a special care when used to achieve a good acquisition of data.

Mayer Wave acquisition can only be achieved in a quite & calm relaxing or meditating state.