When you are in a Clan, you can help your clanmates to speed up their crates or be helped!
This is simple: your clanmates (or yourself) will ask for help to open a Crate or Toolbox they are waiting to unlock. Each member that taps on it will reduce the timer by 3 minutes! So, the more Clan members helping, the quicker you can open it!
Also, for every speed-up you do (keep in mind that it's only one per crate/toolbox), you'll get 5 coins. This way, not only will you help your friends but also get yourself some currency! Isn't that cool?
To ask for help, tap on the crate you want to open and then on "Ask for Help".
And to help others, go to your clan and tap on "clanmates to help".
You can do it all at once by tapping on the "Help All" button or by helping individually.
And it's done! Have fun!