The phrase "a cellphone application" is correct and usable in written English.
You can use it when referring to a software application designed for use on mobile phones.
Example: "I just downloaded a cellphone application that helps me track my fitness goals."
Alternatives: "a mobile app" or "a smartphone application".
A cellphone application is in the works.
Best Buy is giving away a cellphone application intended to get audiences to use their phones during movies.
Uber, a start-up based in San Francisco, offers a cellphone application that is aimed at making using a car service quick and painless.
The peer-to-peer world of the Internet is taking a step onto the nation's freeways in a cellphone application that aims to offer up-to-the-second traffic information through global positioning satellite receivers.
To reduce the number of fatalities among border crossers, a University of San Diego professor, Ricardo Dominguez, has been developing a cellphone application to help guide illegal immigrants to water stations and other points of safety.
When the New York start-up Foursquare Labs made its debut in 2009, it quickly began popularizing the idea of "checking in," or using a cellphone application to tell friends that you are at a particular restaurant, bar or park.
With a new cellphone application called ShopSavvy, for instance, a shopper can use the phone's camera to scan an item's bar code in a store to see if it is available for less online.
GetMobio is a cellphone based application platform that brings a lot of advanced applications to non-smart phones.
Yelp, the popular site that compiles reviews of restaurants and other businesses, recently added a check-in feature to its cellphone application.
Investigators say evidence suggests Shook and Wilson met through a cellphone messaging application.
SAN FRANCISCO — Sure, Shazam, the popular music-spotting cellphone application, can identify that Rihanna track.
