Default Android themes and lock screen wallpapers can get tiresome to look at over time, so you should look for something quaint, new, and relaxing. The Koi fish lock screen locker brings that and more, thanks to its generous selection of stunning koi fish images that will boost your device's aesthetic appearance considerably.

Aside from the wallpapers, the app also offers different ways to secure your phone. You can choose a PIN or password-style lock screen, or you can go for a pattern unlock style if that is more of your preference. This application is downloadable from the Google Play Store for free.