If you're looking for a free educational app to help your fifth-grader learn science, "Learn Fifth Grade Science" is worth checking out. Developed by Mohamed Aly El-Sayed, this app is exclusively available on Android.

With an easy-to-use interface, the app covers various topics of science such as the human body, plants, animals, energy, and more. The app includes interactive quizzes and games to help children understand the concepts better. The content is presented in a simple and accessible way, making it easy for children to follow and learn at their own pace.

The app is free to download and use, and there are no hidden fees or in-app purchases. Although it lacks advanced features, it's a great tool for parents and teachers looking for a basic science learning app for their fifth-graders. Please note that the app will soon add the new 2023 science curriculum as soon as it is released.