Not all phones have a barometric sensor. If your phone is capable you can use this app to access it and record readings.

It has a manually set calibration factor, which you can change to adjust your readings.

It also can "zero" out the pressure for measuring relative differences if necessary.

This version has the ability to email/download your data files.

Feel free to contact us with any concerns or questions about the app.

Thank you,

The Angstrom Metrology Team