Before tapping start, the time can be adjusted by tapping on the days, hours, minutes or seconds digital display at the bottom of the screen. This will open up a tab from which the new days/hours/minutes/seconds can be selected. Tap outside the tab to close it.
To pause the timer, tap anywhere on the timer once it is running. A continue and reset button will then appear. The remaining time can be adjusted at this point, as with setting it at the start.
The small icon in the top left will bring up a menu with four further options: toggle sound on/off, toggle accelerometer on/off, reset all timers and reset all defaults. Reseting all defaults will reset the timer times and their names to their original values.
If the accelerometer is on, turning the device upside down will cause the sand to start flowing backwards. It will take up to 5 seconds for the sand to return to the top half of the hourglass.
The current settings and times are stored on exiting the app. Therefore when the app is next run, the timers will be still be counting down. A notification will be shown in between running the app if the times up is reached. The notifications are cancelled on rebooting the device. Therefore this app is not meant to be a substitute for an alarm clock, no sand timer alarms are sounded when the app is not running.