In this Brief, we begin with a mobile product that has generated both significant scale and a certain amount of controversy: the very small instant consumer loans that have ballooned from 11 deployments in 2011, to 52 in 2016, with a particular concentration in East Africa. In just a few years, through models such as M-Shwari, M-Pawa, Tala and Airtel Money, tens of millions of people have borrowed tiny amounts over their phones. These services represent an enormous increase in formal financial inclusion. They address a fundamental consumer need previously unavailable to lower income people from the formal financial system: the need for very short term money management tools to cope with income and expense volatility. While they are in many ways a boon, they also contain and in some cases heighten risks for their users.