Whenever using a third party app, such as this, there are risks involved that that developers don't tell you regaurding your privacy. Of course, they don't tell you up front....I stumbled across this information by accident and wanted people to exactly what happens when you use apps like this. I copied and pasted the information below:
Third Party Keyboards provide an alternative way to input keyboard data. These keyboards can access all of the data you type, including bank account and credit card numbers, street addresses, as well as other personal and sensitive information. These keyboards may also access nearby text or data, which is useful for improving autocorrect functionality.
If you enable Full Access, developers are permitted to access, collect and transmit the data you type. In addition, if the third party application containing the keyboard has your permission to access location, photos, or other personal data, the keyboard can also collect and transmit that information to the keyboard developer’s servers. If you disable Full Access for a third party keyboard, and then re-enable it, the keyboard’s developer may be able to access, collect and transmit what was typed while the network access was disabled.