If you can't find what you're looking for in our Data Calculator, it's probably because it doesn't use a significant amount of data.
Using Siri, or Google assistant, for example uses very little data. Using Google maps or Maps uses very little too. This is because once you've input the journey, your phone downloads the map you need and 'caches' the information.
So if you can't see it on the list - you probably don't need to worry about it.
Please note: As apps become more sophisticated and cameras create higher resolution images and video, it is likely that your data consumption will increase. Don't forget to factor that in when you are choosing your plan.