Does Lucky Patcher for Android ring a bell? It's an application capable of patching other apps and leapfrogging restrictions imposed by developers or the operating system itself. For the time being, we can't download Lucky Patcher for iPhone but there are quite a few decent alternatives, as is the case of Flex 3.
Hacking iPhone apps is a dream come true
That's basically what this application does: hack applications to introduce modifications, such as those that have to do with in-app purchases that allow us to buy items in different games or simply remove annoying adverts.
This tool offers us a list of the apps running on our iOS device and by clicking on them we'll be able to see which ones can be patched and how. There are two ways of getting hold of this app: through Cydia and typing in the URL of the corresponding repository (https://getdelta.co/) or by downloading the DEB file offered here at Malavida.
However, to be able to install Flex, you're going to need a device with a jailbreak, a 64-bit system, and the app itself.