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Snapchat executives faced tough questions from investors in New York on Tuesday. Most of all: why is user growth slowing?

So far, Snap Inc. has been quick to blame the slowdown on shaky Android performance.

Executives at the roadshow in New York on Tuesday said Android phone users had problems accessing the Snapchat app, particularly in the fourth quarter. They said the company hopes to alleviate issues by developing on Apple's iOS platform and on Android simultaneously.