Need some help with translation (Sorry for English)

Hello, my Spanish comrades!

I wrote an application (it is free) and try to translate it into different languages.

I made the description in Spanish via autotranslator and would like to ask you to check it.

Maybe something should be corrected.

If someone is willing to help, please advise what needs to be done to make it more native-like.

Thank you very much!

"Cribba is an application for iPhone, iPad and iPod touch, that can significantly improve your efficiency on exams.

Cribba is easy to use:

1) Open your educational materials in Cribba.

It opens images and PDF
(you can easy convert other file formats to PDF with third-party applications and tools).

2) Form the crib, selecting main theses using one finger.

3) Use this cribs as you wish (before the exam or on the exam).

Cribba allows you edit your cribs by scaling, adding and replacing pieces.

Cribba provides a navigation in your cribs via categories, folders, shortcuts and icons.

To get the educational materials, you can use iTunes File Sharing.

Furthermore, Cribba supports cloud services: Dropbox, Box and Google Drive."

--->

"Cribba es una aplicación para iPhone, iPad y iPod touch, que permite obtener mejores resultados en los exámenes.

Cribba es fácil de usar:
1) Abra material de estudio en Cribba.

El admite imágenes y PDF.

Usted puede facilmente convertir otros formatos a PDF con la ayuda de aplicaciones de terceros.

2) Cree la chuleta, con un gesto, destacando lo mas importante.

3) Utilice sus chuletas (antes del examen o durante el examen).

Cribba le permite cambiar las chuletas escalar, adicion y componentes en movimiento.

Cribba le permite modificar chuletas cambiando su tamaño, añadiendo nuevo contenido y reesrtucturándo lo los.

Cribba ofrece chuletas de navegacion utilizando categorías, carpetas, accesos directos e iconos.

Para acceder al material de estudios puede utilizar iTunes "archivos compartidos" caracteristica,
asi como servicios en la nube: Dropbox, Box y Google Drive."

ME parece una aplicaión muy interesante putas valencia