An offline-first reader for iPhone
Read Substack anywhere.
Even nowhere.
Stacks downloads the newsletters and podcasts you follow, in full, ahead of time. On a plane, underground, or off the grid, your reading is already on your phone.
Everything, ahead of time
Posts sync in the background with their images and formatting intact, so opening one is instant and never depends on a signal.
Podcasts, offline too
Audio posts download alongside the text. Queue an episode in the terminal, listen at 35,000 feet.
Search your whole library
Full-text search across every cached post, instantly, while offline. Your archive is actually yours to search.
Any RSS feed welcome
Substack is the focus, but Stacks reads any standard RSS or Atom feed with the same offline treatment.
Discover new writing
Browse the recommendation graph of the publications you follow to find your next favorite, with one-tap links back to the original.
Storage you control
See exactly what is cached, set limits, and let old posts fall away automatically. Flight mode shows only what is fully saved.
The reader
Built for long reads, not link previews
Articles render in a clean, distraction-free reader with the original images, footnotes, and formatting preserved.
- Light and dark themes with adjustable type size
- Comments cached for offline reading, collapsible by thread
- Your scroll position survives app restarts
- Export any post to PDF, or open the original on the web in one tap
How it works
Add your publications
Paste a Substack address or RSS URL, or enter your Substack handle to pull in everything you already follow.
Stacks syncs ahead
New posts download automatically in the background: text, images, comments, and audio.
Read anywhere
Airplane mode, the subway, a cabin in the woods. Everything you synced is simply there.
Private by architecture, not by promise
Stacks has no backend. Your reading history, your library, and your habits live on your phone and nowhere else. There is nothing for us to collect, sell, or leak.
Read the full privacy policy