Which way to monetize an android application?

Question

Android

Hello, when developing the application, we encountered the problem of choosing a solution, now we hope for your opinion.
The bottom line is this - in the android application, one of the sections with the information provided will be paid. The potential audience uses both smartphones and tablets.
2 solutions come to mind:
1. Sending SMS when you click on the login button with a notification that this is a paid service implemented through an aggregator. Here the cons are some users on tablets via wi-fi.
2. Connecting mobile payments to qiwi with a response SMS. Minus - some additional complexity for the end user.
Please let me know if there are other solutions for this functionality.

Answer 1

In App Purchase

Answer 2

Probably payment via SMS will be optimal. Yes, many sit through wifi, but everyone has phones. And this is probably the shortest way for the user