Is there a reason you chose iOS? I use lots of Apple products but even I’ll admit they are less hardy and repairable than other options, which makes me believe the prepper audience would prefer alternatives.
So I built this in react-native with plan to release on both iOS and Android but focused on the iOS launch first. The plan was that if people liked it/used it/there were some paying users to offset the costs of hosting/APIs, then I would release the Android version as well.
I will update you if the Android version is launched!