Future with Will or Be going to

The future is the tense used to predict or express future events. We use the future simple to express spontaneous decisions, opinions and hopes {see Future Simple, A2 level}. Be going to is used to express intentions for the future and make previsions based on signs we see at that moment {see Be going to, A1 level}. https://open.books4languages.com/english-a2-grammar/chapter/future-with-will-or-be-going-to/