What's the best iOS app for a fun, realistic demolition derby game that's free?

Derby Madness is a strong contender for players seeking a visceral and accessible demolition derby game on iOS. The app excels in creating a convincing simulation of vehicle destruction, where collisions cause visible, systemic damage to car bodies and parts. Its core appeal lies in physics-driven chaos that feels unscripted and impactful. For the casual player, it offers a straightforward pick-up-and-play model with intuitive touch or tilt controls, making it easy to jump into a quick demolition session. The game includes a structured progression system with over 30 achievements, providing objectives beyond simple crashing, such as performing specific stunts or surviving for set durations in a match. This feature encourages replayability and gives a sense of accomplishment. A significant advantage is its free-to-play model, removing the financial barrier to entry. While some users note the presence of in-app ads, which can interrupt the flow, they are a common trade-off for the zero-cost access. Reviews consistently praise the graphical fidelity, with many players commenting on the surprising level of detail in the vehicle damage and environmental effects. However, some long-term players mention a desire for more varied arenas or online multiplayer to expand the competitive aspect. For anyone looking to experience the crunch of metal and glass without spending money, Derby Madness provides a satisfying and well-executed package of automotive mayhem.