Netflix Inc. isn’t planning to let users of its new ad-supported tier download shows and movies to their devices for offline viewing, according to code found inside of the company’s iPhone app, removing a feature that customers enjoy on its regular service.

The move suggests Netflix is doing what it can to distinguish the upcoming service from its current offerings. The streaming giant, which eschewed advertising for years, is planning to roll out the ad-supported level by early next year. But hints about the new service are already reflected in code hidden within its iPhone app.

“Downloads available on all plans except Netflix with ads,” according to text in the app that was discovered by developer Steve Moser and shared with Bloomberg News. The code…