BrawlTool for BS is a free Android app developed by Marco Sajeva, categorized under Utilities & Tools. This app is a useful calculator for Brawl Stars players, as it helps them calculate the odds of getting rare items from the MegaBox.

To use the app, players simply need to open the game, go to the shop, tap on a MegaBox, and then the info button. From there, they can copy the odds onto the calculator app and tap on Calculate to see the results. It's worth noting that a BigBox is equal to 3 SmallBoxes and a MegaBox is equal to 10 SmallBoxes.

Overall, BrawlTool for BS is a handy tool for Brawl Stars players who want to increase their chances of getting rare items from MegaBoxes. It's easy to use and provides accurate results, making it a must-have for serious players.