MonsterTrader is a fine inflation game that allows players to strengthen the Demon King Army using earned coins. This iPhone game offers an engaging experience where players can purchase and summon monsters to battle with heroes. The goal is to strengthen the Demon King Army by strategically selling and buying monsters according to the situation.

One of the selling points of MonsterTrader is its similarity to clicker games, where the more you play, the more efficient you become at earning coins. The game also offers a wide variety of unique monsters with different roles such as attack, assistance, and recovery, providing players with plenty of choices and strategies to explore.

Additionally, MonsterTrader supports online ranking, allowing players to compete for strategy through time attack. This adds a competitive element to the game, making it even more engaging for players.

Overall, MonsterTrader is a fun and addictive inflation game for iPhone, offering a unique gameplay experience with its monster summoning and strategic elements. It's a game that can keep players entertained for hours as they aim to strengthen the Demon King Army and reach the goal stage.