With more than a million apps available for download and with smartphones essentially acting like computers, some analysts are expecting more businesses to create apps to serve the 15 percent of the world's population, estimated as more than a billion people, who have some form of a disability.
"Apps are an invaluable tool for people with communication disabilities — specifically speech, language and hearing disabilities," says Diane Paul, director at the American Speech-Language-Hearing Association. She said they can help improve spoken and written communication, and reduce the stigma of a disability.
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Brad Dicianno, associate professor at the University of Pittsburgh School of Medicine, tells CNBC that people with disabilities are "a rather tech-savvy group" and can use technology to a high extent if it is made accessible to those with disabilities.
One app on the market now is Five, a messaging tool for the deaf and hearing impaired that allows users to send personalized hand signals and sign language to each other. Mateusz Mach of Poland, the 18-year-old CEO of Five, calls the app the "first computer sign language messenger for the deaf." Five, however, wasn't born out of necessity — it was created by accident.
Mach, a lover of rap music, was inspired by popular hand signals that artists like Kanye West and Kendrick Lamar throw up in concerts. He originally wanted to create an app to send those gestures to friends. That idea did not catch on, but instead Mach found the app appealed to the hearing impaired.
"Their natural internal voice is reflected better in sign, and texting can feel like a foreign language," Mach told CNBC. "Currently the proper messenger doesn't exist. By using our app the deaf can communicate in almost the entire alphabet of American Sign Language."
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Since its release in mid-2015, Mach says around 10,000 people are using Five, and he hopes that number will continue to grow later this year when the next version is released.