text: Mobile Twitter had mobile apps for iPhone, iPad, and Android. In April 2017, Twitter introduced Twitter Lite, a progressive web app designed for regions with unreliable and slow Internet connections, with a size of less than one megabyte, designed for devices with limited storage capacity.
  Twitter Blue
  On June 3, 2021, Twitter announced a paid subscription service called Twitter Blue. Following Twitter's ongoing "X" name change, the subscription was rebranded to X Blue (or simply Blue), and, on August 5, 2023, was rebranded to X Premium (or simply Premium). The subscription provides additional premium features to the service. In November 2023 a "Premium+" subscription was launched, with a higher monthly fee giving benefits such as the omission of adverts on For You and Following feeds.
  Verification of paid accounts
  In November 2022, Musk announced plans to add account verification and the ability to upload longer audio and video to Twitter Blue. A previous perk offering advertising-free news articles from participating publishers was dropped, but Musk stated that Twitter did want to work with publishers on a similar "paywall bypass" perk. Musk had pushed for a more expensive version of Twitter Blue following his takeover, arguing that it would be needed to offset a decline in advertising revenue. Twitter states that paid verification is required to help reduce fraudulent accounts.