In general, it is not recommendable to adquire debt unless it is necessary.
I have seen some of those apps, specially I have seen Xiaomi's credit app called "Mi Credit", according what I have read it is popular in India (one's of Xiaomi's most important markets).

I am not familiarized with the interest of these apps and whether they are predatory or not, as a rule of thumb, credit is supposed to be a tool for emergency expenses but unfortunately I am aware that there are people in both developed and developing countries that put themselves in a position of increasing debt risking their credit scored and personal finances.