FAQ
What exercises does BellSense track?
Eight exercises: hardstyle swing, snatch, clean, goblet squat, 1-arm row, overhead press, Turkish get-up, and windmill.
What workout modes are available?
BellSense supports Individual workouts (a single exercise per session), Complex workouts (a sequence of exercises performed in linked cycles), and Alternating workouts (ballistic and strength movements interleaved in the same session). All modes include real-time rep counting and post-session scoring.
Do I need a subscription?
No. BellSense is a one-time purchase. The sensor and iOS app are included with no recurring fees.
What kettlebells are compatible?
BellSense mounts beneath the kettlebell handle. No modifications required.
Does it work without the sensor?
No. The hardware sensor is required for rep counting and quality scoring.
What iPhone is required?
Any iPhone running iOS 16 or later with Bluetooth support.
How accurate is the rep counting?
BellSense uses a 208 Hz IMU with signal processing tuned to eliminate false positives. Expect sub-1% error on validated exercises.
Can I use it for heart rate monitoring?
The iOS app supports any Bluetooth heart rate monitor. The BellSense sensor itself does not include heart rate hardware.
How do I turn the sensor on?
Press the reset button — you'll see a blue pulsing LED. Open the BellSense app and the sensor connects automatically. The LED turns solid green when paired.
What do the LED colors mean?
Blue pulsing: ready to pair. Solid green: connected. Fast green blink: workout active. Yellow blink: calibrating — hold the bell still. Slow red blink: battery low. Fast red blink: error — press reset. No light: off or asleep.
How do I charge it?
Plug in via USB-C. The sensor works normally while charging and won't auto-sleep while plugged in.
How do I wake the sensor from sleep?
Press the reset button. The blue pulse will appear and it's ready to pair.
The app can't find my sensor — what do I do?
Make sure the LED is pulsing blue (if not, press reset to wake it). Then toggle Bluetooth off and on in your iPhone settings and try connecting again.
How do I contact support?
Email support@bellsense.app. We typically respond within 24 hours.