Quick note for anyone looking for a reliable Hill Climb Racing mod:

I recently tried the HILL CLIMB RACING MOD from a trustworthy source and was impressed by how smoothly the mods ran on my older Android phone — more stable than some other APKs I've tried. The mod includes unlimited coins and unlocked vehicles which made testing different upgrades much faster (great for trying out hill setups without grinding).

Installation was straightforward: download the APK, allow installs from unknown sources, install, then launch. If you get a security warning, re-check the APK file with your antivirus app before proceeding.

For the exact file I used (clean, updated build), check this link:
HILL CLIMB RACING MOD APK latest version

Tip: Back up your original game data before installing any mod so you can restore progress if needed. Hope this helps — happy climbing!

— A fellow player