Each month, free TunnelBear users will have their available data reset to 500MB to use for the remainder of the month.
It's important to note that the data resets on the anniversary of your account creation and not the first of the month. If you're not actively using TunnelBear, the data will reset the first time you log into the app after your monthly anniversary has passed.
For example: If you created your account on the 4th of January, your monthly data will reset on the 4th of each month following, or the next time you log into the app after the 4th.