Notations is a free Android app developed by Junior Designs in the category of Utilities & Tools. It is a helpful tool for performing mathematical operations with scientific notations and converting decimal numbers to scientific notations and vice-versa.

The app has a simple and user-friendly interface, making it easy for users to navigate and perform their desired operations. Notations is especially useful for students, researchers, and professionals who frequently work with numbers in scientific notation. The app also allows users to copy and paste their results, making it easy to transfer their calculations to other documents or applications.

Overall, Notations is a convenient tool for anyone who needs to work with scientific notations on a regular basis. Its ease of use and functionality make it a valuable addition to any user's toolbox.