Over a month, a free-to-play player can earn 15,000+ Gems legitimately. This is the slow, steady "cheat."
But here is the cold, hard truth:
When you use a speed-up, your phone sends a message: "Server, remove 1 hour speed-up from my inventory." The server verifies you actually own that item, subtracts it, and replies, "Timer reduced." Cheat Engine runs on your PC, but your PC never tells the server how many Gems you have. The server tells you . infinity kingdom cheat engine