Notebook is an Android app developed by gamonkityaz, available for free in the Education & Reference category. It is a must-have app for harp enthusiasts and beginners. The app offers a unique combination of old and new harp strings, including 56 pinnacles that are not available anywhere else.

With Notebook, you can practice playing the harp anytime and anywhere. The app features a harp that you can open and play with ease. It includes a range of harp strings, such as "Boom trip," "Do not back him up," "Dying to death in front of," and "He's so naughty." The app also provides free lessons for novice players to improve their skills.

Overall, Notebook is a great app for anyone who loves to play the harp. It is easy to use, and the variety of strings and lessons make it an excellent tool for practicing. Download it now and start strumming!