(Most apps are for both the iPhone and Android phones, but some are for just one system).
Most apps designed for a phone work well, but take advantage of the extra screen real estate.
The Jolla phone - pronounced Yol-la - is powered by open-source operating system Sailfish, but can run most apps designed for Google's Android platform.
Most apps are for children aged three to five, though SmarTots' target age range is as wide as two to seven.
Because of its position as the mobile-app leader, most apps are made for the iPhone first.
While most apps are meant for iPhones and Android phones, owners of Windows phones also have access to services like Yelp and Zagat to Go.
Most apps are available for free, but may also include the app name in the photo unless you paid for it.
That has effectively meant that voice interfaces for most apps would have been too cost-prohibitive and time-prohibitive for most app publishers.
At the moment, for most apps that means running a little faster.
For most apps, there is a skip button, which can be used if you're serious about which photos you like, and which ones you don't.
