Contact person: Smart Wearable Respiratory Monitor

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Location: New Delhi, India

Budget: Recommended by industry experts

Time to start: As soon as possible

Project description:
"I want to build a small, comfortable wearable that tracks every phase of my breathing in real time. It must
• measure the volume of each inhalation and exhalation,
• time how long a breath is held,
• log overall breathing rate, and
• capture heart-rate variation alongside those metrics.

A bright, integrated display should show the live readings on the wrist or chest unit itself, while Bluetooth LE streams the same data to phones, tablets, or a desktop dashboard for deeper analysis. On-board storage is essential so nothing is lost when the companion app is closed or the phone is out of range, and the stored sessions should sync automatically once a connection is re-established.

I need a freelancer who can take the project from sensor selection through to a tested prototype, including firmware that collects and calibrates the data, the enclosure design that keeps the form factor lightweight, and a simple reference app or desktop viewer that proves the live-data feed works.

Acceptance criteria
• Accurate readings within standard spirometry tolerances for volume, ±5 % for heart rate.
• Continuous operation for at least eight hours on a single charge.
• Reliable Bluetooth connection with no data loss at 5 Hz sampling.
• CSV or JSON export of stored sessions.

If you have experience combining respiratory sensors with BLE micro-controllers and can demonstrate a working proof-of-concept rapidly, let’s talk about bringing this wearable to life.

should work with iOS and android and watch os and android watch operating system" (client-provided description)