Using any outsource to increase clash of clans gems, gold and Elixier is known as coctool. There are many Hacking apps and tools available that most clash of clan users are using. However, the use of any kind of hack is strictly prohibited by the clash of clans developer (Supercell).
There are a lot of videos available on Youtube about the clash of clans hack but most of them are fake but some methods work. These are some working methods that you can try.
- Clash of Clans Generator
- Mod Apps
- Private Server
For More Information and methods to use all there kind of hacks visit Clash of clans generator