If you have an issue with times showing differently in the mobile app to what was rostered, this is mostly likely caused by the timezone on your phone set differently to what is setup for your Branch in Brevity.
Check your timezone setting in Brevity
While logged in as an Administrator in Brevity, navigate to Administration > Branch Setup. Ensure the correct timezone is set here.
Check timezone on the mobile device
For Apple devices
Please refer to the guide of the following link https://support.apple.com/en-us/HT203483.
In short, you should ensure the correct timezone is set for your device in Settings > General > Date & Time > Time Zone.
For Android devices
Please refer to the guide of the following link https://support.google.com/android/answer/2841106?hl=en .
In short, you should ensure the correct timezone is set for your device in Settings > System > Date & Time > Automatic Time Zone.