I’d say a modified app, but I’m can’t say for certain.
My reasoning goes like this:
Situation one: I have one app using processing power watching for a specific condition. Then, when condition is met it sends out 4 text messages.
Situation two: I have four apps, each using the same processing power the one app above did, watching for a specific condition. Then, when the condition is met, each sends out one text message.
After the condition is met it’s very similar… but prior to the condition four different programs are running all watching for the same condition.