1. "Formatear" appears multiple times. Possible synonyms: formatear, resetear, reiniciar; formatear, resetear, limpiar; etc. So, I can replace each occurrence of "formatear" with reiniciar.

"Utiliza un programa confiable: Utiliza un programa confiable y seguro para formatear tu tablet Android."

Recommendations section:

2. "Programa adecuado" might be expanded to software adecuado. Wait, the user might not want to change "programa" but maybe "adecuado" but that's an adjective. Hmm. Alternatively, "formatear" is the key verb here.