Pillar · Stress & biofeedback
Your body in numbers
Biofeedback means seeing your own body signals in real time — pulse, heart rate variability, breathing or skin conductance — and trying out what helps you calm down.
We have worked with biofeedback since 2010, when we developed our first skin conductance sensor. In 2014 came the StressLocator app and Bluetooth oximeters that send the pulse wave to your phone.
Today we offer two lines of sensors: oximeters for pulse wave and heart rate variability, and the new wireless skin conductance sensor Emet Wireless. The data is shown in our StressLocator Pro and FairStream Pulse apps.
Devices
Sensors
Emet Wireless
A wireless skin conductance (EDA) sensor. It sends the signal to your phone over Bluetooth.
Emet Wireless
StressLocator oximeter BM1000C
A Bluetooth finger oximeter. It measures SpO2 and pulse and sends the pulse wave to the StressLocator Pro app.
BM1000C oximeter
Alert StressLocator oximeter BM2000B
A wrist oximeter with a finger sensor for longer measurements. Works with StressLocator Pro and Sleep as Android.
BM2000B oximeterApps
Where you see the signals
StressLocator Pro
Pulse wave and heart rate variability (HRV), a simple and an expert mode, breathing exercises with biofeedback and a measurement history. Without a sensor it gives a rough reading with the phone camera.
StressLocator ProFairStream Pulse
A video call in which both sides see the participant's live body signals — heart rate, HRV, breathing or skin conductance. For guides (coaches, breathing and relaxation instructors) and their clients.
Compatibility
What works with what
| Device | StressLocator Pro | FairStream Pulse | New Happy app |
|---|---|---|---|
| Emet Wireless | — | yes | yes |
| BM1000C oximeter | yes | yes | — |
| Bluetooth chest strap (e.g. Polar) | yes | yes | — |
| Phone only | camera (rough) | call without data | — |
We are preparing the new Happy app for Emet Wireless for the start of shipping in November 2026; we will announce its name. All listed apps run on Android, FairStream Pulse also in the browser.
For business: we also build biofeedback apps under a client's brand, including oximeters carrying their name. One reference is the Viktor Schiller breathing exercise app. Get in touch.
Frequently asked questions
What is skin conductance (EDA)?
Skin conducts electricity slightly better when it sweats a little. Skin conductance therefore changes within seconds depending on how tense or relaxed you are. It is one of the most widely used signals in biofeedback.
What is HRV?
Heart rate variability — how much the intervals between individual heartbeats differ. The app calculates it from the pulse wave of an oximeter or from a chest strap.
Does Emet Wireless work with StressLocator Pro?
No. Emet Wireless works with the FairStream Pulse app and with a new Happy app we are preparing for the start of shipping in November 2026.
Does it work on iPhone?
StressLocator Pro is Android only. FairStream Pulse has a web version. We are preparing the new Emet Wireless app for Android and iPhone.
Will the app tell me I am stressed?
The apps show how your signals change. They are for training and personal insight and do not diagnose or treat anything.
Get the sensors in our e-shop
Emet Wireless is on pre-order and ships in November 2026. The oximeters are available in the e-shop.