The NTSA Driving School Book 2021 is a free Android application developed by aced tech that provides essential notes on driving and road signs in Kenya. This app is an excellent resource for anyone aspiring to obtain a driving license in Kenya or those who want to refresh their knowledge of driving and road signs.

The app includes notes on road signs, basic oral knowledge, the law of Kenya on drivers and charges, do's and don'ts on the road, how to drive a manual and automatic vehicle, the gears of a vehicle, NTSA approved speed governors 2020, signs found on a vehicle dashboard, and a share option. The app also includes a section for questions and answers, allowing users to test their knowledge and prepare for their driving test.

Overall, the NTSA Driving School Book 2021 is a well-organized and informative app that provides users with the necessary information to become safe and responsible drivers in Kenya.