I might just be missing something, but is l there a way to send reminders to customers to pay late invoices from mobile? Would just be convenient.

Hello davin-theriault-,

Glad to have you connect with us here. I'll be happy to share more info and steer you in the right direction so you can achieve your QuickBooks goals with ease. 

In order to utilize the Reminder function in QuickBooks, you'll have to be using the web-browser version of QuickBooks instead of the mobile app. To do this, open your web-browser on a computer or phone and visit www.qbo.ca. From here you can sign into your account and follow the helpful steps in the following article: Send invoice reminders automatically or manually in QuickBooks Online. You're also more than welcome to send feedback to our engineers about features or improvements you'd like to see on the mobile app by clicking on the Gear icon and navigating to Feedback. 

Let me know if this info helps by leaving a comment below. I'll be a message away in case you need anything else.