The cost influencing parameters for developing an app like Venmo, which is a P2P payment application, are quite numerous. Major factors include the features of the app to be developed, complexity of design, whether it will be developed for iOS, Android, or both, and security aspects. Some other minor sub-functions like real-time payments, user verification, or the transaction history can also affect the costs. In addition to that, the expenses for app maintenance as well as updating are also there for making the app long-lived and satisfying for the users. The developers must have broad experience in this line so that a well-developed, secure application is delivered for users' satisfaction.