We have developed a new reminders feature that allows you to schedule times to be reminded about checking your budgets or categorizing your transactions.
You can choose to be reminded by email and/or a mobile notification.
This is only a beta release, as we continue testing this new feature. So in order to try it out, you need to have opted into the beta features as shown in this guide: Becoming a beta tester in PocketSmith. You can then create reminders by going to Settings > User preferences > Reminders.