If you're looking for a small tutorial on programming in C language, Programar em C might be a good fit for you. This Android application developed by FCSA Softwares offers a brief introduction to programming in C through a series of texts in Portuguese. The tutorial covers basic concepts such as variables, loops, arrays, and functions, and promises to add more content such as chained structures and recursion in the future.

The interface of Programar em C is simple and easy to navigate, with a menu that allows you to access each text separately. The texts are well-written and clear, making it easy for beginners to understand the concepts presented. However, it's worth noting that the app is only available in Portuguese, so it might not be suitable for non-Portuguese speakers.

Overall, if you're a Portuguese speaker looking for a beginner-friendly tutorial on C programming, Programar em C is definitely worth checking out.