Simple no frill barometer with up to 14 days recorded pressure trend.

Work in progress, there will be frequent updates coming in.

Features:
- Barometer reading in mBar from built in sensor
- Periodical reading of barometric pressure (every 15 minutes / 30 minutes / 1 hour)
- Shows pressure trend based on 1 hour / 2 hours / 3 hours pressure history
- Recorded pressure trend is presented in multiple charts (12 hours, 24 hours, 2 days, 4 days, 7 days, and 14 days)
- Export database to CSV file (up to 14 days worth of data)
- Pressure trend widget (2 x 1). Widget update frequency depends on pressure tracking interval setting.

Note:
- This app requires a device with a pressure sensor.
- Please enable pressure tracking from Settings

Permissions are:
- RECEIVE_BOOT_COMPLETED: Used to auto-start the barometer service for pressure measurement reading. Can be turned off (graph will not be updated / drawn)

- WRITE_EXTERNAL_STORAGE: Required to export the measurement history to a CSV file.