Rebecca Yarros revealed four new characters from the next Empyrean book this week, and the Fourth Wing corner of every reading Discord went sideways for two days. If you’re rereading Fourth Wing, Iron Flame, and Onyx Storm before the fourth book drops, or if you’re the person in your friend group who tracks Threshing Day theories, the seven Android apps below are what we run to keep the reread coherent. These are the best apps for Fourth Wing book companions on Android, ranked for tracking, community, and the note-taking depth a Basgiath rider deserves.
What to look for in a Fourth Wing companion
- BookTok-friendly discovery, because the Empyrean series lives on that platform
- Content warnings on titles, which the Fourth Wing audience explicitly asks for
- Buddy read and book club features, since Empyrean reads faster in a group
- Import from Goodreads, so a decade of reading history follows you
- Character and lore note-taking (dragons, riders, signets, wings)
- Audiobook sync, because Iron Flame is a 22-hour listen
- Ad-free reading logs
Quick comparison
| App | Best for | Free plan | Paid | Standout |
|---|---|---|---|---|
| Goodreads | Threshing Day theory threads | Full app, ads | None | Biggest reviewer base |
| Fable | Empyrean book clubs | Full features | Optional support | Chapter-gated clubs |
| The StoryGraph | Content warnings for spice | Full app | ~$5/month Plus | Community-sourced CWs |
| Hardcover | DRM-free reading log | Full app | Supporter tier | Modern clean design |
| Notion | Rider and dragon canon notes | Free personal | Around $10/month Plus | Custom databases |
| Audible | Iron Flame on the bus | Free trial | Around $16/month | Whispersync |
| Libby | Free library holds for Empyrean | Free | Free | Library-linked |
The apps
1. Goodreads, best for Threshing Day theory threads
Goodreads is where the Fourth Wing conversation actually happens. Every book in the Empyrean series has thousands of reviews, chapter-by-chapter discussion threads, and the biggest volume of “what happens next” theorizing anywhere online. It’s ugly by 2026 standards, but the density of people talking is why the Fourth Wing fandom still lands here first. The Android app finally let you scan a barcode without a phone-camera fight, and the reading challenge widget is a modest motivator.
Where it falls short: Amazon-owned so nothing sensitive stays private, ads on shelves, and the review comment threads still page slowly on older devices.
Pricing:
- Free: Full app, small ad load
- Paid: None
Download: Aptoide · Google Play
Bottom line: install this first if you want to be in the room where the Threshing Day theories happen.
2. Fable, best for Empyrean book clubs
Fable built its product around public book clubs. Fourth Wing has one of the most active club networks on the app, discussion threads are chapter-gated so nothing spoils a reread, and the algorithm pushes you toward clubs that match what you’ve been reading. It’s the closest anyone has come to a BookTok-in-an-app experience, and the video book-review layer is genuinely used.
Where it falls short: the statistics side is shallow compared to StoryGraph, and the video features are Wi-Fi hungry.
Pricing:
- Free: Full features
- Paid: Optional supporter tier
Download: Google Play
Bottom line: the pick if reading Empyrean with a group matters more than the analytics.
3. The StoryGraph, best for content warnings
The StoryGraph is the reading tracker that led the industry on content warnings, which is exactly what the Fourth Wing readership asks about. Every title carries community-sourced CWs, the mood tags let you plot Iron Flame’s genre swings against your reading calendar, and the pacing charts are legibly better than Goodreads’. Import from Goodreads takes minutes and doesn’t lose the shelves.
Where it falls short: the social layer is quiet compared to Fable or Goodreads, and the free tier hides some of the deeper stats.
Pricing:
- Free: Full app
- Paid: Around $5/month Plus
Download: Google Play
Bottom line: the pick when the reader wants to know the spice level before starting.
4. Hardcover, best for a DRM-free reading log
Hardcover is the modern-designed reading log that treats its data as yours. Open API, exportable shelves, clean layouts, and a community that leans literary without excluding romantasy. The Empyrean series has a growing shelf here, and the reviews trend more considered than either Goodreads or Fable.
Where it falls short: smaller reviewer base means fewer reactions to your own reviews, and the buddy-read tooling is still catching up.
Pricing:
- Free: Full app
- Paid: Supporter tier
Download: Google Play
Bottom line: the pick if you want a reading log that will still be yours in five years.
5. Notion, best for rider and dragon canon notes
Notion turns a Fourth Wing reread into a proper canon tracker. A rider table with signets, dragons, and War Games standings, a Basgiath quadrants database, a spoiler-safe reread journal, and a shared workspace that a book club can populate together. The Android app is faster in 2026 than it used to be, the widget shows recent pages on the home screen, and the sharing extension takes any BookTok clip or blog post and drops it into your Fourth Wing page.
Where it falls short: the offline experience on the phone is still weaker than the desktop app, and the initial setup takes an evening.
Pricing:
- Free: Full personal workspace with page cap
- Paid: Around $10/month Plus
Download: Google Play
Bottom line: install this if your reread is going to produce a canon wiki you and your book club actually use.
6. Audible, best for Iron Flame on the bus
Audible carries the Empyrean series in the Rebecca Soler / Teddy Hamilton reads that most listeners consider the definitive audio version. The Android app supports Whispersync so you can hop from Kindle to audio and back without losing your place, and the download queue works over a mobile connection without fighting you.
Where it falls short: monthly credit accounting is frustrating, and the app auto-plays sample intros in a way you’ll want to turn off.
Pricing:
- Free: 30-day trial with one credit
- Paid: Around $16/month for one credit and unlimited Plus catalogue
Download: Google Play
Bottom line: the pick for the reread commute.
7. Libby, best for free library holds for Empyrean
Libby is the Overdrive library-linked reader, and it’s how a lot of the Fourth Wing audience actually reads the series for free. Every US and UK public library carries the Empyrean books, holds move fast, and the app supports both ebook and audiobook loans with a shared bookshelf between the two. Every card you hold works, and the Kindle handoff turns library ebooks into Kindle reads on your regular Kindle account.
Where it falls short: popular titles have long hold queues, and the app assumes you have a US or UK library card.
Pricing:
- Free: Everything
- Paid: None
Download: Google Play
Bottom line: the pick if you want to read the whole series without spending anything.
How to pick the right one
Start with Goodreads because that’s where the Empyrean threads run hottest. Add Fable if you want a book club, or The StoryGraph if you want content warnings and analytics. Hardcover is the pick if the shape of a “durable reading log” is what you’re building. Notion is the wiki you’ll be grateful for by book four, when a rider table with signets and dragons is genuinely how you’ll keep track. Audible is for the commute. Libby is for the wait.
If you’re just starting the Empyrean reread, Goodreads plus Libby is enough. If your reread is building toward a fandom project (fanart, fanfic, a TikTok theory series), add Notion on day one so the notes are in one place.
FAQ
What’s the best free Fourth Wing companion app on Android?
Goodreads and Libby together carry the largest share of the fandom. Both are free, both work on Android, and neither will ask for a subscription.
Which app has the best content warnings for romantasy?
The StoryGraph. Its community-sourced CWs are the reason romantasy readers migrate to it from Goodreads.
Can I sync my Fourth Wing reads between Kindle and Audible?
Yes. Whispersync for Voice, when both the ebook and audio are bought under the same Amazon account, moves your position between the Kindle app and Audible on the same device.
Which reading tracker imports from Goodreads?
The StoryGraph, Hardcover, Fable, and Bookly all import from a Goodreads CSV export. StoryGraph’s importer is the smoothest today.
Is there an official Fourth Wing companion app?
No official app. Entangled Publishing runs a mailing list and social channels but hasn’t shipped a dedicated companion app.
