Download Android App Android App Clinometer, Spirit Level, Protractor, Bubble Level is .apk ❤️. If You Want To Download Android App Clinometer, Spirit Level, Protractor, Bubble Level is for your Android device, you should do easy instruction. You need go to the Settings menu and allow, installing .apk files from Unknown Resources. After that, you could calmly download all .apk files from APK4K, and confidently install it on your AndroidOS Device.