A free app for Android, by Ubiquiti Inc..

UISP CRM for Android is an all-in-one CRM solution for service providers. This tool offers a complete management of your clients, contacts, plans, services, invoices, payments, and much more.

You can organize your clients and contacts, add notes, set reminders, manage billing and recurring invoices, generate custom invoices, handle payments, and generate reports.

All the information is stored in one place, so you can access it anytime, anywhere. You can also add clients and contacts from your phonebook, and generate custom invoices from the information you enter.

This tool also offers an automatic way of keeping track of your clients’ plans and payments.