Choosing the right database for a mobile app is crucial to meet user expectations and deliver a seamless experience. With numerous database types available, each with its strengths and weaknesses, selecting the correct one can be overwhelming. A unified set of criteria, including data structure, size, speed and scale, data modeling flexibility, security needs, supporting multiple app platforms, seamless data conflict resolution, accurate partition syncing, low latency, and compatible updates & changes, must be considered to ensure the chosen database fits the use case. An inventory of databases, including MySQL, PostgreSQL, MongoDB, Memcached, Cassandra, ArangoDB, CouchDB, and Redis, can narrow down the search and increase the probability of selecting the right database for the app. By following a structured approach and considering these criteria, developers can make an informed decision and choose a database that will make or break their mobile application.