Comedy Central has at last launched its app for Apple iOS devices, which has been years in the works, stocked with nearly 200 episodes and stand-up specials including “South Park,” “The Daily Show with Jon Stewart” and “The Colbert Report.”

But while some of the app’s content is free for anyone to watch, most of the lineup — including the entire run of “Chappelle’s Show” from Dave Chappelle — is behind a paywall, available only to subscribers of participating pay-TV partners. Dish Network subs, for example, don’t have access to the full bouquet of shows.

Another thing: The app requires iOS 7, the latest operating system update from Apple. Also, the app currently does not support AirPlay, which lets users stream media to an Apple TV set-top. (UPDATE: Comedy Central said it is developing an Android version of the app, to be available this summer.)

In any case, it’s the first time Comedy Central is making its programming available through a mobile app. The TV shows include the most recent season of “South Park” and next-day availability of Comedy Central’s latenight lineup of “The Daily Show with Jon Stewart,” “The Colbert Report” and “@midnight.” In addition, all app users will be able to preview two yet-to-premiere new series: the animated “Trip Tank” and uncensored stand-up series “Comedy Underground with Dave Attell.”

Subscribers of participating “TV Everywhere” partners will get a whole lot more, including: advance episodes of the new season of “Inside Amy Schumer,” premiering exclusively in the app one week prior to their premiere on Comedy Central, as well as full seasons of “Tosh.0,” “Broad City,” “Workaholics,” “Kroll Show,” “Futurama,” “Review,” “Trip Tank,” “Chappelle’s Show,” Comedy Central stand-up series and specials and more.

Pay-TV providers that have signed on to Viacom’s “TV Everywhere” service include Comcast, DirecTV, Time Warner Cable, Verizon FiOS, AT&T U-verse, Cox, Cablevision, Bright House Networks, Suddenlink, RCN and 12 smaller providers. Dish is the biggest pay-TV provider that isn’t yet participating in Viacom’s program.

“The Comedy Central app is a seamless extension of the brand that gives fans access to their favorite Comedy Central content instantly and anywhere,” network president Michele Ganeless said. “It is homescreen-worthy and an incredible platform for viewing and sharing our programming.”

The full episodes will carry ads, but the load will be lower than on TV, with typically one ad per break in the Comedy Central app. The cabler will continue to offer the CC:Stand-Up app, which provides free access to a library of routines from Kevin Hart, Louis C.K., Amy Schumer, Aziz Ansari and others.

Comedy Central worked with mobile-development shop Isobar to design and build the app, the same firm that worked on the Comedy Central Stand-Up app last year. The cabler’s launch of the app follows other Viacom networks’ rollout of TV Everywhere apps, including MTV, Nickelodeon and VH1.

Unilever’s Axe Peace and Corona Extra are the launch sponsors of the Comedy Central app. The app for iPhone, iPad and iPod touch is available free to download on the iTunes App Store.