I downloaded Survival Nation Mobile and says I need to update the game first but I can't find out how to update it?

I hope they keep being generous..

After lots of hours in the game and getting pretty far into I feel I can give it a honest review. I'll be honest you are gonna see 4 types of reviews on this game 1:People who just love the manga /ln/ anime 100% can say worth it. 2: People who got amazing pulls back to back or gave in spent money have the dupes they need to progress. 3: people who have had no luck with draws which can make the game harder. 4: People who have had average luck with pulls and are able progress but if you don't get dupes it will be a hard time. That's one of the biggest problems in the game more hunter is not always better its more about getting correct dupes. After you get to ch 8 the challenge comes. If you don't have a strong enough team from pulls life will be hard. That's when the p2w comes in and will continue having to get over walls if luck is not on your side.

It is very cool game