Download Smart Tool Box - Handy Carpenter Kit v17.1 Pro Requirements: Android 4.1+ Overview: Smart Tool Box is a handy tool box app with 40 smart DIY and metering tools like bubble level, ruler, compass, distance meter, unit converter, DB meter, protractor, stopwatch, NFC, bar and QR reader... Use device's in-built sensors in all in one tool box app, handy like a swiss army knife. DIY