How Can I Manage API Calls to Limit Currency Rate Requests in My iOS App?

Having a centralized server is key for what you're trying to achieve. Essentially, it helps you maintain a single source of truth for the currency rates, which is updated every 60 seconds. If you tried to manage it all directly within the app, users' experience would probably suffer, especially as the number of users increases. A server ensures that the app remains responsive and efficient.

You can't really manage API calls directly from multiple user devices without causing issues. The standard approach would be to set up a central server that handles the API request for you. Instead of each user making a call to the API, they would hit your server, which would fetch the data every 60 seconds and cache it. Then, when users need the latest rates, they can just pull it from your server instead. This way, you minimize the number of API requests and keep your app functional for everyone.

Yeah, you definitely need a server to handle this. You could implement a queuing system where all requests from your iOS app go to the server, which then makes the API call. There are different methods, like using a lock to ensure that calls are processed in accordance with the rate limit or caching data to improve performance. You might want to check out some solutions for queuing or caching as well.