Guide

How to calibrate a watch barometer to a known reading

A barometer that is a few hPa off makes every trend and altitude estimate a little wrong. BaroGuard lets you line it up with a trusted reference in a minute.

1 min readWritten from play.google.com✓ Approved by the founder · 4 Nov 2026
On this page
  1. Step by step
  2. Questions

Step by step

  1. Find a trusted pressure reference, such as a nearby official weather station reading or a calibrated instrument.Screen: Calibration screen
  2. Open BaroGuard and pick the unit the reference uses, hPa/mbar, inHg or mmHg.Screen: Live pressure with unit setting
  3. Enter the reference value, or make a quick offset adjustment if you only need a small correction.Screen: Offset adjustment control
  4. For altitude, set your current position as zero or enter a known reference altitude.Screen: Altitude reference screen
  5. Watch the live reading for a minute to make sure it stays steady after the change.Screen: Trend indicator
  6. Recheck the calibration from time to time, because readings can vary with hardware and conditions.Screen: Live pressure screen

Questions

What can I put on a watch face complication?

Pressure, trend, delta, a gauge-style view or estimated altitude, on supported complication slots.

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Can I use it for paragliding or flying?

No. BaroGuard is not a certified variometer, professional altimeter or aviation instrument.

Source: play.google.com
Can I choose when a pressure alert fires?

Yes. You pick the threshold, the trend window, the direction and a cooldown.

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Can I set my altitude to a known value?

Yes. You can set your current position as zero or enter a known reference altitude.

Source: play.google.com
Which climb rates does it show?

Current, 5-second and 30-second rates, in m/s or ft/min.

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What happens if I leave the app during a climb session?

The session stops. Vertical-speed sessions only run while BaroGuard stays in the foreground.

Source: play.google.com

Tracks live atmospheric pressure, estimated altitude, and vertical speed for Wear OS smartwatch users.