- Do your planned features bring extra value for the customer? - Will they bring extra revenue for you?

- Does the platform take a cut from your ad-revenue?

- Are you able to find and coordinate a developer (android + iOS) by yourself?

- Are the revenues high enough to sustain regular development efforts on both platforms (pay your dev) + pay yourself a fair share for the effort?

That would be the questions I'd ask myself before re-building the apps. Just keep in mind re-building them is not a one-time effort but a regular expense... especially if you add more complexity with new features.