The phrase "biggest application" is correct and usable in written English.
For example, you could use it in a sentence such as, "The biggest application for this technology is in the medical field."
And AOL's biggest application -- letting its members send and receive instant messages on their phones -- now has 1 million users.
Even so, its biggest application is expected to come from printing plastic chips on consumer items such as T-shirts, drink cans and food cartons for displaying health messages or providing sales and restocking data.Plastic Logic, also located in Cambridge, England, is developing display drivers using plastic circuitry.
One of the biggest application areas of computing is the automation of decision-making processes and control.
One of the biggest application areas is in the aerospace industries, for instance, as static and rotating components in turbine engines.
To encourage developers to create content for bada, Samsung launched the 'bada Developer Challenge', the biggest application contest in 2010.
Arguably the biggest application for Bitcoin over the last few weeks has been as a tool for capital flight.
The two biggest applications are electronic payment terminals and fleet management.
In fact, I think social could become one of the biggest applications of VR.
"The two biggest applications we see is in the retail sector to measure foot traffic and motion throughout a store.
Medicine: Medicine is one of the biggest applications of public health, as many medical practitioners, firms, and groups work with the intention of expanding healthy outcomes and care for underserved populations, or to expand medical knowledge in general.
His team has attended similar events, and at each they are building small pieces of what they hope will come together as a big application.
