Substack is a publishing and social media app where writers, podcasters, and other creators share newsletters, posts, and media directly with subscribers, usually via email and an in‑app feed.

What is the Substack app?

The Substack app is the mobile side of the Substack platform, available on iOS and Android, that lets you read, listen, and interact with creators in one place. It combines elements of a newsletter reader, blog platform, and social network, with feeds, comments, chats, and subscriptions.

Core things it does

  • Shows a personal feed of posts, short notes, videos, and podcast episodes from creators you follow.
  • Lets you subscribe to writers and publications for free or via paid subscriptions, with content delivered in‑app and by email.
  • Supports newsletters, long‑form articles, podcasts, and some video or short‑form “clips.”
  • Offers comments, likes, live chats, and private group chats so communities can form around specific creators.
  • Includes a Discover tab and trending areas to find new publications and creators.

How Substack works (in simple terms)

You can think of Substack as “email newsletter + blog + social app” in one.

For readers (using the app):

  1. Download the app and create an account/handle.
  1. Follow or subscribe to creators you like (free or paid).
  1. Read posts in your feed, get emails if you want, and join comments or chats.

For creators:

  1. Open a publication, set a name, description, and basic branding.
  1. Write posts in a clean editor and publish them to the web, email, and app at once.
  1. Optionally turn on paid subscriptions to monetize, with Substack taking a 10% cut of paid revenue.

Key features of the Substack app

Reading & listening

  • Ad‑free reading experience for newsletters and articles.
  • Built‑in player for podcasts and some video content.
  • Short‑form feed (“Notes”) for quick updates and social‑style posts.

Community & social tools

  • Comments, likes, and “restacks” (similar to reposting/boosting).
  • Live group chats, DMs, and livestreams for closer creator–fan interaction.
  • Profiles and discovery tabs for browsing people and topics across the network.

Creator tools

  • Simple editor with headings, images, links, quotes, etc.
  • Scheduling posts, sending via email, or publishing only to the web/app.
  • Basic analytics plus ownership of your subscriber email list, which you can export.

Substack app vs other platforms

[5][3] [4][5] [10] [2][4]
Platform Main use How it feels Money model
Substack app Newsletters, blogs, podcasts, community Mix of email newsletter, blog, and social feed Paid subscriptions; Substack takes ~10% of paid revenue
Medium Articles and essays Magazine‑like reading experience Platform membership pool and partner program
Twitter/X Short posts and real‑time updates Fast, algorithm‑heavy social feed Ad‑based, plus some subscriptions and tips
Mailchimp Email marketing Marketing tool, not a social app SaaS pricing, no built‑in reader app like Substack

Why it’s a trending topic now

  • The app has shifted from “just newsletter delivery” toward being openly framed as a social media app with feeds, likes, DMs, and discovery.
  • Many independent journalists, niche experts, and creators now use Substack as their main publishing home, especially after changes on other social platforms in recent years.
  • Debates continue around content moderation, creator independence, and Substack’s role as an alternative to big ad‑driven networks.

Mini example: how someone might use the app

Imagine you follow a film critic on Substack who publishes a weekly long review, a mid‑week podcast, and short festival notes.

  • You subscribe in the app (free or paid), then you get the long review both in email and in your app feed.
  • You listen to the podcast in the app player while commuting, and join a live chat during big awards nights.
  • If you become a paid subscriber, you might unlock extra posts and access to a private group chat.

TL;DR: The Substack app is where you read, listen to, and interact with independent newsletters, blogs, and podcasts in a social, feed‑based interface, with optional paid subscriptions that directly support creators.

Information gathered from public forums or data available on the internet and portrayed here.