Considering the basic functionality for an Android or iOS platform, real money rummy game development will cost around $5,000 to $15,000. Creating a rummy game with all the advanced features that runs across multiple platforms can cost up to $20,000. Apart from choosing the right gamming company, the price of Rummy game app also depends on various other factors.Rummy game development costs for small companies are $25 – $50 / hour. and Costs for rummy game development at an enterprise-level company range from $100 to $300 per hour.