If a business is not yet generating revenue (or when the size of the user base is particularly important to the business model) the MoM MAU Growth can be a good measure of a company's growth rate.
This metric can also be calculated on the basis of User Count. If a company generates revenue MoM Revenue Growth should also be looked into.
MoM Revenue Growth
The difference between this month's MAU and last month's MAU divided by last month's MAU gives the monthly active user growth.
(MAU 2nd month - MAU 1st month)
÷ MAU 1st month
MoM MAU Growth
In January a business had 1.000 active users, in February its active user base had grown to 1.200