
Net Nanny
Net Nanny is a parental control brand that has been around since 1995. In 2016 it was bought out and rebuilt by Zift, and in 2019 it reverted back to the Net Nanny brand name.
We have not used this app extensively, but it appears to be very similar to Qustodio, although it is missing a few of the features.
Net Nanny is mainly a filter, but it allows you to block and control apps as well, meaning it could replace some functions of an App Locker.