And then there was Starz.

The hot and crowded market of subscription streaming services will get yet another entrant on Tuesday when Starz, the premium TV network, plans to introduce a stand-alone app available on Apple and Google devices.

Aimed at the 20 million homes that pay for broadband but not the full cable TV bundle, the new service, which costs $9 a month, will offer Starz original series like “Outlander” and “Power,” as well as thousands of TV episodes and movies, including Disney’s blockbuster “Star Wars: The Force Awakens” later this year.

The development puts a renewed spotlight on Starz, which has surpassed its rival Showtime to become the second-largest premium TV network in the country behind HBO. Now it is seeking to expand its footprint even more by making the network available outside the traditional pay TV model, as HBO has with HBO Now, and other media companies have with similar services.

At the same time, Starz has been the subject of on-again-off-again merger and acquisition chatter since 2013, when it spun off from the billionaire John C. Malone’s Liberty Media. Mr. Malone, known for his deal making, has spoken publicly about what he sees as the need for consolidation of what he calls “free radicals” in the media industry.