The next morning, Leo set out. Deep in the heart of the forest, where the canopy swallowed the sun and his cell signal vanished, he pulled out his phone to check a fork in the trail. The screen was black. He pressed the power button, but only a red skull icon appeared, followed by a scrolling list of his own personal contacts. A message flashed: “Your data is our trail now. Pay 0.5 BTC to unlock.”

The free version of AllTrails is still incredibly powerful. While you won't get offline maps or wrong-turn alerts, you still have access to: