Are there plans to add reminder notifications to phones? (so a notification pops up when something is due)
It looks like the only options are email and text messages.
Please try to use "Push notifications" in your Todoist's account Settings -> Reminders and then add a task with a due time, for example: tomorrow at 3pm.
Do the reminder text messages work outside the USA? I'm in Australia, will they work with Australian accriers??
The SMS reminder service is available worldwide. There are 3 outgoing hosts (one US host and two Canadian hosts) which you can choose in case one of them may not work.