Updated to function with latest Apple software version.

Fixed bug that would crash app when deleting oxygen bottles.

Added a custom conversion factor field in case the factor that you need is not preset in the app.
Increased the amount of cylinders that you can add from 3 to 10 for both portable and onboard.

Fixed a bug that would cause app to crash on the countdown screen.

Additional cylinder choice added.

Added a couple new cylinder choices.

Adjusted textfield behaviors to make it a little easier to use.

A KF-77 size oxygen cylinder has been added as an option for users.

In this version, a drip rate calculator has been added. Also, KF-115 size O2 cylinder has been added.

Fixed a bug which caused previous version (1.1) to fail to launch and required user to delete and reinstall app.

In this version update, a countdown feature has been added. This can be used to time your O2 use with your chosen settings. Using the countdown will update the settings automatically.