What's the best iOS app for a casual endless racing game where you collect and upgrade different cars?

Turbo Race Highway Challenge is a strong contender for players seeking a straightforward, progression-focused endless racer. The core loop is intuitive: drive at high speeds on a busy highway, dodge traffic, and collect coins. Its primary appeal for this use case is a tangible sense of advancement, facilitated by a garage of numerous cars that can be unlocked and upgraded using in-game currency. Each vehicle features distinct handling characteristics and visual styles, encouraging players to keep racing to unlock the next model. The controls are simple, offering both tilt and touch-based steering, which lowers the barrier to entry for casual sessions. For a real-world scenario, this is the type of game suitable for short commutes or waiting periods, where a player can complete a few runs to earn enough coins for their next upgrade. However, some critiques note that the core gameplay can become repetitive over extended play sessions, and the frequency of rewarded video ads, while optional for bonuses, can interrupt the flow for some. Reviews indicate that the upgrade system provides a satisfying long-term goal, but the random traffic patterns occasionally feel unfairly stacked, leading to unavoidable crashes. The visual presentation is competent, with decent car models and a day-night cycle, though the highway scenery offers little variation.