A wearable that looks right on a bench but drains its battery in a day, or loses a Bluetooth connection every few minutes, never ships in volume. Embien's firmware development for smart rings and fitness trackers is built around the constraints that actually decide whether a wearable survives contact with real users: PPG signal processing on a coin-cell budget, wireless charging coil tuning, and BLE advertising intervals tuned for both battery life and a responsive companion app.
That same discipline carries into smart ring development with wireless charging specifically — ring-form-factor PCB and antenna design, PPG heart-rate sensor integration, and charging-case firmware — alongside custom wearable fitness tracker development for wrist-worn and clip-on form factors. Explore the full breadth of our wearable and IoT device work on the consumer electronics engineering hub
What custom wearable fitness tracker development and smart ring development with wireless charging actually require from an engineering partner, from sensor to shipped product.

Coil and charging-case design paired with ultra-low-power firmware so a smart ring or fitness tracker holds a useful battery life between charges.

Custom drivers and signal-processing firmware for PPG heart-rate, SpO2, and motion sensors, tuned for accuracy on a wearable's tight power and size budget.

GATT profile design and mobile app integration so fitness data reaches a phone reliably, without hammering the wearable's battery.

Structured smart watch testing across firmware, sensor accuracy, and BLE reliability before a wearable design moves to volume manufacturing.
From smart ring development with wireless charging to smart watch GUI work, see the real, delivered wearable engagements behind these capabilities.

PPG heart-rate sensing, wireless charging, and ring-form-factor hardware and firmware — see how we engineered it for a real production ring.

Bluetooth Low Energy hardware and firmware for a wearable device, engineered for reliable connectivity and long battery life.

GUI design and development for a smart watch using Sparklet, plus the firmware behind it — including the smart watch testing that validated it.
Tell us about your smart ring development with wireless charging idea, or a custom wearable fitness tracker development project already underway. An engineer will help you scope hardware, firmware, and testing.

It spans ring-form-factor PCB and antenna design, PPG heart-rate sensor integration, wireless charging coil and case design, ultra-low-power firmware, and BLE connectivity to a companion app — see our smart ring case study for a real production example.
Tell us about your smart ring, fitness tracker, or smart watch project and let's plan the engineering.