Verbos is an excellent tool to obtain offline and from your iOS device all verb inflections from all the Spanish verbs admitted by The Spanish Royal Academy (RAE).
Currently, Verbos is the only app of its kind in the App Store that follows the terminology recommendations included in the RAE Nueva gramática de la lengua española (2009)- the so-called academic terminology. Verbos embraces as well the terminology used by Andrés Bello in his Gramática de la lengua castellana destinada al uso de los americanos (1847), which sets the standard in many Hispanic countries.