Triangle Solver and Coach is a free Android app developed by Torben Hermansen, falling under the category of utilities & tools. The app solves general triangle problems and teaches the user how to solve them simultaneously. It provides step-by-step solutions to specific problems along with the option to save drawings of solutions to SD-card. The app also includes a small textbook on using Trigonometry.

The app has a user-friendly interface, making it accessible to all users. It is an excellent tool for students and professionals who need to solve triangle problems. The app provides a comprehensive solution, including the law of sines and the law of cosines. The feature of saving drawings of solutions to SD-card is a unique and handy feature. The small textbook on using Trigonometry is also useful and informative.

In conclusion, Triangle Solver and Coach is an excellent app that provides an efficient solution to general triangle problems. The app is easy to use and provides a step-by-step explanation of the solution. The ability to save drawings of solutions to SD-card is a unique and useful feature. The inclusion of a small textbook on using Trigonometry makes it more informative and practical.