Does DROWZLE work on all versions of iPhones and Android phones? Does it work on all versions of iOS and Android OS?

Provides current compatibility coverage for phones and associated operating systems.

DROWZLE is intended to work on an iPhone 5s or later models running iOS v9.0 and beyond.

DROWZLE is intended to work on any Android-based phone running OS v4.2 or beyond.

However, it is recommended that you keep your phone on the latest distributed version of iOS or Android OS for best, overall performance.