There are many operating systems on both platforms so you can check which platform is giving you the updated operating system on a usual basis. For example, the Android application is working nicely, and they are updating the operating system on monthly or yearly bases, thus, of course, this platform will be nice for you. You will be able to optimize the app according to your requirements and also according to the operating system you are using. If the same thing is happening on the iOS platform, then you need to go for that. Depending on the market demand and the cost it will ask you for making it you can decide which platform will work for you.