Keys are the premium currency. In a mod, you never wait 30 minutes to revive after a crash. Tap "Continue" as many times as you want.
Dedicated websites that archive various versions of the game, including the latest "World Tour" updates. How to Install Subway Surfers Mod on iOS (No Jailbreak) subway+surfers+mod+ios+ipa+verified
Modified versions of the game typically offer "infinite" resources to unlock characters like Jake, Tricky, and Fresh instantly. Common features include: Infinite Coins & Keys Keys are the premium currency
If you are determined to try, use (like iOSGods or r/sideloaded). Avoid any website that asks for your Apple ID password or promises "permanent verification." subway+surfers+mod+ios+ipa+verified