The whole bookshelf
A whole bookshelf in the weight of one sefer — preloaded on the device and working without a connection.
Talmud Bavli
The entire Shas, with the original Vilna daf layout — 5,406 pages
Talmud Yerushalmi
38 tractates, with Penei Moshe, Korban HaEdah and Mareh HaPanim
Mishnah
63 tractates, with Bartenura, Rambam's commentary, Tosafot Yom Tov and more
Tanakh
39 books, with 14 commentaries — Rashi, Ramban, Ibn Ezra, Radak, Sforno and more
Rambam
Mishneh Torah with the Ra'avad, and some 50,000 linked source references
Tur and Shulchan Arukh
All four sections, with 35 commentaries
Mishnah Berurah
In the original printed layout, including Shaar HaTziyun — volumes 1-2
Rif
23 tractates
Midrash
25 works, 17,808 sections — Midrash Rabbah, Tanchuma, Pesikta, Mekhilta, Sifra and Sifrei
Everything links to everything
The seforim do not stand apart. From a daf of Gemara one tap reaches Rashi, Tosafot, the Rambam, the Tur, the Shulchan Arukh and its commentaries — and returns you to the exact same place. A reference in the Rambam opens its source in Gemara or Mishnah; a verse in Tanakh opens every sugya in Shas that discusses it.