Lakhmir Singh & Manjit Kaur 9 is a free android app developed by App For Student under the Education & Reference category. This app provides a complete solution to the NCERT Class 9th textbook. It includes all subjects in PDF format along with their respective solutions. The app is user-friendly and easy to navigate.

The Physics section of the app includes solutions to chapters such as Motion, Force and Laws of Motion, Gravitation, Work and Energy, and Sound. The Chemistry section includes solutions to chapters such as Matter in Our Surroundings, Is Matter Around Us Pure?, Atoms and Molecules, and Structure of the Atom. The Biology section includes solutions to chapters such as Improvement in Food Resource, Fundamental Unit of Life-Cell, Tissues, Diversity in Living Organisms, Why Do We Fall III, and Natural Resource. The app is a great tool for students who want to enhance their learning experience and improve their understanding of the subject matter.