Barometer periodically checks the pressure values using barometer sensor on your device and shows the most recent pressure and altitude value on the screen in readable way. You can also use widget to monitor current pressure and altitude value. All readings are saved and may be presented as a graph. Collected data can be saved as CSV file.
It's free to get the installation package of Barometer, also, you can read users' reviews on Droid Informer. The app runs on Android 4.0 and above. The download of this application doesn't contain viruses or any kind of malware. Emparador is the official developer of the tool which can be found in the Weather category.
The latest update of Barometer was launched on Jan 15, 2016 and the app has been installed by over 100 users. People rated this application 4.6 on Google Play.