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bpm
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Not connected
Tap Connect to pair your Fitbit Air
50%75%100% max

Interrupted session

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Settings

Max heart rate
Estimate from age
Target zone
Speak cues
Voice
Speed 0.94
Pitch 1.02
Update every

Workout builder

Alert above bpm
…held for sec

Press and hold a block to lift it (or drag ≡ right away) · drop onto a block to make a ×2 group · drag out of a group to split it

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Advanced — text format

Time in zone

ZoneEffortRangeTime

Developer — BPM simulator

Local testing only. Feeds the same intake as the real band, so zones, guards, plan advance and cues all behave identically.

Simulate heart rate
Source
Heart rate 70bpm
Run target bpm
Walk target bpm
Drift while running bpm/min
Clock speed

Log

Ready.
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Press and hold anywhere for 1.5s to unlock