BTT Lah! includes: 1. Visual ergonomics - BTT Lah! uses minimal light required for readability and reduces eye strain and eye fatigue caused by smartphone screen glare whenever you practice for driving theory test. 2. Playback Algorithms - BTT Lah! eliminates information overload by controlling questions inflow and focusing only on questions that you actually need. This algorithms ensures your learning speed and you learn much faster than any other traditional question and answer system. 3.