Answer: An incidental beneficiary
Explanation:
An incident beneficiary is one of the type of concept that helps in providing the indirect benefits from the specific contract and it is basically known as the third party benefits from the specific contract in an organization.
According to the given question, the App developer Inc., is dealing the contract with the Carmen who is the chief executive officer of one of the sales corporation for the purpose of creating the latest app for an organization.
The App developer Inc., contract is basically refers to Max as an incident beneficiary as it provide the App to the corporation. Therefore, An incident beneficiary is the correct answer.