An update is adding new and relevant aspects to the app to keep it fully functional. App update frequency depends entirely on: the type of technology or features or industry used by the owner or competitors. While some update apps every alternate day some take longer.
Either way, whether a year or often and there is no concrete evidence that suggests the best approach. It all depends on the app owner and type of industry operating in and the target audience. But if you still have doubts, our mobile app development services company is always here to help!