If you are looking for a comprehensive book app for your Android device, look no further than بداية المجتهد ونهاية المقتصد by So Smart Apps. This educational and reference app is perfect for those interested in reading Ibn Rushd's "The grandson" book.

One of the standout features of this app is the ability to customize the font size, color, and shape within eight Arabic fonts. You can also choose from hundreds of colors and dozens of themes for the page background. The app also has a side list of all chapters for easy navigation, with arrows at the end of each chapter to move to the next and previous chapter easily.

The app also offers the ability to copy and share any chapter or section completely, as well as the ability to search for any word within all doors and chapters. Plus, you can save your notes and favorite doors for easy access. Overall, بداية المجتهد ونهاية المقتصد is a must-have app for anyone interested in reading Ibn Rushd's "The grandson" book on their Android device.