Privacy: HillFactor has no account or network connection. Its only permission writes the optional factor chart into your activity FIT file.
Add and configure it
- Install HillFactor, then open a compatible Hike, Trail Run, Run, Walk or similar activity.
- In Activity Settings, add HillFactor to a data screen. A one-field layout gives it the largest display.
- In Connect IQ settings, choose a target factor from 25% to 200%, whether to show the time delta, and the contrast mode.
Read the result
A lower factor means faster progress. At a 100% target, a negative delta means you are ahead of the classic Naismith estimate; a positive delta means behind. The field waits for at least 200 m and 120 seconds of estimated Naismith effort before assigning a status.
Limits
HillFactor uses elapsed time, distance and accumulated ascent supplied by the active Garmin profile. It is not navigation, a safety tool or a guaranteed finish-time predictor. The classic model does not account for descent, terrain, weather, fatigue or individual fitness.
Troubleshooting
- No value: wait for the activity to provide enough valid distance, ascent and time.
- Unexpected ascent: check the watch elevation source and activity profile; the app cannot repair incorrect elevation input.
- No chart after saving: confirm the Fitness & Sensor Data permission and look for the Connect IQ developer field in Garmin Connect.