Most shiurim apps have one or two sources. **KolBo has 1,367+ speakers across every major English-language frum shiurim platform** — unified into a single, searchable, offline-capable library.
On a Kosher iPhone, the entire library is pre-installed and ready. No per-platform login. No app-switching to find the speaker you want.
What's in the library
TorahAnytime
The complete TorahAnytime catalog: Rav Pincus, Rav Reisman, Rav Gold, Rav Kahn, hundreds more.
YU Torah
The Rav, Rav Schachter, Rav Willig, Rav Twersky, the full YU roshei yeshiva catalog.
Kol Halashon
Rav Druckman, Rav Melamed, Rav Cherki, the Bnei Akiva and dati-leumi shiurim tradition.
Chabad.org
The complete Chabad catalog — Lubavitcher Rebbe archives, contemporary chassidishe shiurim, Tanya series.
OU Torah
Orthodox Union audio library — Shabbos shiurim, parsha, halacha.
Yeshiva Network
Rabbi YY Jacobson, Rabbi Paysach Krohn, Rabbi Zecharia Wallerstein archive, and more.
How it works on your Kosher iPhone
The shiurim library is pre-installed with your account signed in. From the first power-on, you can search by speaker, topic, parsha, masechet, or halachic area. Results span all 768,916 shiurim and 1,367+ speakers.
**Offline downloads**: tap any shiur to download it for later. It stays on your device for the flight, the car ride, the morning walk.
**Playlists**: create your own sequences — daily chavrusa, parsha prep, halachic deep-dives.
**Speed control**: 0.75x to 2.0x. Most customers settle at 1.25x–1.5x for English shiurim, 1.0x for Hebrew.
**Voice search**: "Play Rav Reisman on this week's parsha" — and it does.
Why this is the moat
**Nobody else ships a frum phone with 768,000 shiurim pre-loaded.** No competitor in the kosher-phone space comes close on the content side. Most ship a filtered phone plus whatever apps the user happens to install. We ship the phone plus the entire shiurim ecosystem — curated, unified, offline-capable, free for life.
This is what "bundled with KolBo" actually means.