When I was programming in windows you could change stuff in textboxes ,labels ,listboxes using a API call that would target said textbox and label. This is how some earlier yahoo booters where made back in the day to target the correct text box and automatically fill the chat box with the script that would crash yahoo messenger. Nothing connected via internet in the code was needed, a simple program running in the background, modifying what is being displayed in a certain app instantly via disabling then relabeling a channel name, if it matches keywords, so I'm not talking out of my ass here, not saying they have done it or its possible on iOS Operating System might be a bit different to how Windows functions. Someone who understands how the iOS environment works might corroborate if doing this is plausible from iOS.
When I was programming in windows you could change stuff in textboxes ,labels ,listboxes using a API call that would target said textbox and label. This is how some earlier yahoo booters where made back in the day to target the correct text box and automatically fill the chat box with the script that would crash yahoo messenger.
Look up Pat or JKs API spy to see what I'm talking about.