Don’t be misled by comments on videos or sites promoting hacking. These comments are typically created by fake accounts in order to encourage others to try the hack. [1] X Research source
Attempting to hack Clash of Clans by using a service is all but guaranteed to cause problems, whether it be because of malware or your account being reported for violating the Terms of Service. Best-case scenario, attempting to hack Clash of Clans just wastes your time.
Gems also shouldn’t be used to purchase resources or decrease building times. Again, patience is your friend when attempting to build up your gem inventory.
Simply connecting Clash of Clans to the Google Play Store will net you 50 gems. Once you’ve unlocked an achievement, tapping your current level in the top-left corner of the screen and then tapping Claim Rewards next to the achievement will add the reward gems to your inventory.
Some obstacles, such as trees, will respawn every 8 hours. Rocks do not respawn, so consider removing them after removing an obstacle for which you received 0 gems. This will almost always ensure that you receive at least 1 gem for removing the rocks.
You’ll need to retrieve your gems periodically depending on the Gem Mine’s level. For example, a level 1 Gem Mine can hold a maximum of 10 gems before it will stop producing them. Retrieving your gems will allow the Gem Mine to resume production. At its highest tier, the Gem Mine can store up to 18 gems. [4] X Research source
This isn’t a hack, but it’s a relatively quick way to earn a small, disposable amount of money with which you can feel comfortable buying gems. Google Opinion Rewards can be downloaded for free from the Google Play Store.