Gravitas Crunch is a reading, research, audiobook, and radio workspace for long-form material. Paste a link, read from the clipboard, import a file, follow feeds, open podcasts, and move from source to summary to listening without leaving the app.
Built for serious reading and repeat listening: grounded summaries, clickable source provenance, article audiobooks, podcast playback, and station-style radio generated from your feed library.
Long-form sources need structure. The app keeps articles, feeds, podcasts, videos, papers, and files in one place so you can stay inside the source instead of copying content into disconnected tools.
AI needs grounding. Research output is tied back to source offsets and inline citations so you can jump back into the original material.
Listening should be first-class. Any serious reading workflow eventually becomes an audio workflow, so Gravitas Crunch includes article audiobooks, podcast playback, and Gravitas Radio.
The result is a single workspace for reading, crunching, outlining, note-taking, playback, and feed-driven listening.
Bring in your sources
Gravitas Crunch supports fast intake from the surfaces people actually use every day.
Read from Clipboard: Copy a link or supported content, then open it directly.
Paste a link: Open articles, Substack posts, Medium posts, videos, Apple Podcasts links, Reddit threads, arXiv pages, PubMed entries, DOI links, and more.
Import files: Bring in PDF, EPUB, plain text, and Markdown files for full reading and listening workflows.
Follow feeds: Build a live source library from RSS feeds and use it in My Station or the Now channel.
Connect services: Optional service connections live in the Connect area alongside your feed library.
Supported source families in the app include Articles, Feeds and Catalogs, EPUBs, Medium, Substack, Videos, Podcasts, Reddit, PubMed, arXiv, and DOI-driven research sources.
How it works
Gravitas Crunch is built so you can move between deep reading and ambient listening without rebuilding the same context over and over.
Typical workflow
Open a source: Use Read from Clipboard, paste a link, import a file, open a feed item, or start from a podcast episode.
Read in the source view: Stay inside the article, paper, Reddit thread, feed item, or transcript while the app preserves structure and media.
Crunch it: Generate a grounded summary, pick a style such as Executive, Technical, or Study Guide, then ask follow-up questions.
Switch to listening: Turn the current article into an audiobook, or let Gravitas Radio build anchor-style narration from your stations and feeds.
Save your work: Add notes, revisit the item from History, and export research output as plain text, Markdown, or PDF.
Research Assistant
The Research Assistant is where Gravitas Crunch shifts from reader to working tool.
Crunch summaries: Generate a source-aware summary from the current article or document.
Choose the style: Switch between Executive, Technical, and Study Guide output depending on the job.
Ask follow-up questions: Continue the conversation after the initial Crunch instead of starting over in another tool.
Generate outlines: Turn the current summary state into an outline when you want the structure, not just the prose.
Use clickable provenance: Tap grounded bullets or citations to jump back to the exact place in the source.
Keep notes in context: Save notes against the active research conversation.
Export and share: Copy transcript text, share plain text, share Markdown, or export a PDF.
The app also includes a Radio Brief mode for anchor-ready summaries tied to the same underlying source.
Article audiobooks
When you want full playback instead of a summary, Gravitas Crunch turns the current article into a sectioned audiobook.
Section-based playback: Articles are prepared into navigable sections instead of one unbroken wall of audio.
Jump by section: Move to the previous or next section directly from the mini player.
Pick a voice: Use the active voice system for article playback and see the active voice badge in the player.
Stay tied to the article: The audiobook player keeps the title, byline, publication, artwork, and reading context visible.
Use lock screen controls: The media stack coordinates with playback ownership so the listening experience behaves like a proper media app.
Gravitas Radio
Gravitas Radio turns your feed library into a station-driven listening product instead of a pile of tabs.
Now channel: Pull the freshest available stories across your feed library and keep the session moving.
My Station: Build a station from the feeds you follow and order them the way you want.
Curated stations: Browse station categories such as News, Politics, Business and Markets, Technology, Science, Space, Gaming, Entertainment, Sports, and more.
Anchor-style narration: Radio stories are prepared as short spoken packages, not just read aloud raw articles.
Shuffle and queue controls: See what is up next, shuffle supported stations, and open the live article behind the currently speaking item.
Voice-aware playback: Radio uses the same speech system so station listening can match the voice setup you prefer.
Jump back into reading: Open the current source directly from the player when you want the full article behind the brief.
Feeds, podcasts, and connected workflows
Gravitas Crunch is not just a single-article app. It is built for repeat intake.
Feed library: Add and refresh feeds, browse feed items, and use them as direct reading inputs or radio inputs.
Podcast theater: Play podcast episodes with transport controls, episode browsing, and transcript loading when available.
Transcript-first listening: Podcast transcripts can be loaded on demand so playback and reading stay connected.
History and resume: Return to recently opened sources and resume research from prior sessions.
One workspace, multiple modes: Reader, research assistant, audiobook, and radio all sit on top of the same source graph instead of forcing separate imports.
Feature snapshot
Read from Clipboard for fast source intake.
Import PDF, EPUB, text, and Markdown from the local device.
Open web-native sources like articles, Substack, Medium, videos, podcasts, Reddit, PubMed, arXiv, and DOI links.
Generate grounded research output with summaries, citations, and follow-up chat.
Export research conversations as plain text, Markdown, or PDF.
Turn articles into audiobooks with sections and transport controls.
Listen through Gravitas Radio with Now, My Station, and curated stations.
Keep notes and context attached to research sessions and reading history.
Sharing and outputs
Gravitas Crunch is built for working sessions, but it also gives you portable outputs when you need them.
Copy transcript: Grab the current research conversation in plain text.
Share plain text or Markdown: Move notes and summaries into your writing stack quickly.
Export PDF: Create a shareable research export from the current conversation.
Open the original source: Jump back out to the live article, post, or media page whenever you need the raw source.
Sora hooks where configured: The UI preserves a path for Sora-related export flows when available in your setup.
FAQ + Troubleshooting
Quick help
Open a source: Read from Clipboard, paste a link, import a file, or select a feed item
Generate a summary: Open Research Assistant and press Crunch
Ask a follow-up: Use the composer under the research conversation
Start article audio: Open the audiobook player from the active article
Start radio: Open Gravitas Radio and choose Now, My Station, or a curated station
Resume work: Open History
FAQ
What kinds of sources can I use? Articles, feeds, EPUBs, PDFs, videos, podcasts, Reddit threads, and research-oriented links like PubMed, arXiv, and DOI pages.
Is it private? The app is built around private, on-device research where supported. Core reading still works even when on-device FoundationModels features are unavailable.
What is the difference between My Station and Now? My Station follows your chosen feed mix. Now pulls the freshest eligible stories from the active feed library for a live session feel.
Can I listen to full articles? Yes. Gravitas Crunch supports sectioned article audiobooks in addition to shorter radio-style narration.
Can I read podcasts too? Podcast playback includes transcript loading when transcripts are available for the current episode.
Troubleshooting
Research Assistant unavailable: Your current device or runtime may not support Apple FoundationModels. Reading, source browsing, and other non-assisted workflows still work.
Crunch is still running: Watch the status card for progress, elapsed time, and chunk counters while the summary is being prepared.
No transcript in podcast view: The current episode may not publish transcripts, or the transcript has not been loaded yet.
No items in a feed: Refresh the feed or confirm the source is still publishing a valid RSS stream.
