iGrammar - Spanish app for iPhone and iPad

Quick and simple basic Spanish grammar reference that includes a reference card for each of the following grammar rules:

*Los verbos
*Los pronombers personales
*Los artículos determinados
*Los artículos indeterminados
*Los adjetivos posesivos
*El verbo SER
*El verbo ESTAR
*El presente indicativo
*El pretérito perfecto simple
*El pretérito imperfecto
*El pretérito perfecto compuesto
*El pretérito pluscuamperfecto
*El futuro simple
*El condicional simple
*Imperativo
*Las preposiciones
*Los comparativos / Los superlativos irregulares
*Los pronombres personales de objeto

This application, the rules, as well as the example sentences for each of the rules are entirely in Spanish.