For the best value on legitimate purchases, check the Dragon City Official Web Store , which often offers web-only bonuses of +10% on gems.
Official Fair Play Guidelines state that the use of third-party tools is a direct violation of their terms of service. Developers use automated systems to detect "impossible" resource spikes, which often lead to permanent bans. Pwnhack. Com Dragon
You can earn free gems by watching advertisements directly within the app. For the best value on legitimate purchases, check