Please Read This As It Would Help You Make A Decision
-Easy to play/use
Brawl Stars is a completely free to play game (no in-app purchases required) and absolutely no issue at all. You start in a tutorial that tells you how to move and how to attack, it's pretty straight forward. (After completing the tutorial and playing a match there is a shop containing in-app purchases, make sure to read to Consumerism if you are concerned).
Brawl Stars has a trophy reward system that allows you to get rewards as you progress in the game, there is a Trophy Road and a Season Reset. The Trophy Road has a lot of rewards to collect, it can be some boxes/chests, brawlers, or just some things to boost your progression. Season Reset. In Season Reset you lose some trophies in exchange for a currency called Star Points (this only affects higher trophy players).
Brawl Pass. Brawl Pass contains a free pass and a paid pass, but the free and paid pass are completely equal. The only things that the paid side offers that the free one doesn't, is... Skins (changes characters/brawlers appearance), a character/brawler, and a Pin Pack. The developers have made it not as necessary to purchase, as other video games have (free to play friendly).
The game also contains a level system. The level system is very balanced, all you need is some coins and power points (coins and power points are completely free and are easy to obtain).
Level Costs (in-game currency)
Level 1 - All characters/brawlers start at this level
Level 2 - 20 Power Points + 20 Coins
Level 3 - 30 Power Points + 35 Coins
Level 4 - 50 Power Points + 75 Coins
Level 5 - 80 Power Points + 140 Coins
Level 6 - 130 Power Points + 290 Coins
Level 7 - 210 Power Points + 480 Coins (Gadgets are now available in boxes)
Level 8 - 340 Power Points + 800 Coins
Level 9 - 550 Power Points + 1250 Coins
Level 10 - After reaching Level 9 a thing called Star Powers are available from boxes, obtaining one will get your brawler to Level 10.
Total Costs - 1410 Power Points + 3090 Coins.
I see lots of reviews talking about consumerism...just saying, either you don't tell your kids a password that might help them find a way to buy things in-game, or go to the app settings and turn in-app purchases off (you can try pressing all over the shop and nothing will happen).
I also see some reviews talking about violence. The game is getting constant updates, and in those updates they remodel some characters (Brawlers) to look more cartoonish. The game has already been good visually and all they have done is make it better for kids, when Characters (Brawlers) get killed they don't leave blood, they instead leave something called elixir. I think parents have to pay more attention, take mine for example. they would look at the game and read some reviews that are sorted by most relevant. they would also take a look at total rating and if its good enough they go watch some game play. If the game play looked good enough in every way they can find they would let us play the game (me and my siblings).
Now for the people who say its not safe for privacy. The Brawl Stars developer team has implemented lots of ways to protect younger kids. Examples:
Team Chat. When you are playing with someone in a team that you don't know in real life, you can then go to the top right corner and click the button right beside the three bars. There should be two options that you can toggle On and Off one of which is a "Mute Text Chat" button (now when you play with a stranger they can't say anything that can offend or find out information about your kid).
Clubs/Clans. Inside of clubs the developer added a feature when someone starts the game. It ask for an age make sure your kid puts their real age! This way, your kid cant join any clubs that aren't marked as family friendly. Family friendly mode censors lots of words that can potentially be bad for your kid (trust me when I say lots of words get censored).
There is no form of swearing in the entire game