Sometimes, newer app updates do not work well on older devices, which can lead to installation or performance issues. It is also possible that new versions of AppLock-Calculator may be faulty due to incompatibilities with some Android architectures. While the development team works on a solution, you may consider using an older version of AppLock-Calculator. For this purpose, Uptodown offers an extensive AppLock-Calculator version history, where you can find the previous files available. Download previous versions of AppLock-Calculator for Android from Uptodown, virus-free and free of charge.