“Voy a” or Future Tense?

In Rosetta Stone it says “mañana te compraré unos jeans nuevos.” But, since I struggle with future tense, would it be correct to say “mañana te voy a comprar unos jeans nuevos”? What are some instances where you should use “voy a” and what are some instances where it’s better to use future tense? Or, can I just always use “voy a” because it’s easier? Thanks ☺️

submitted by /u/icantoteit136
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