Rabbit Hole
Deep Dives
HBKL Labs LLC
Rabbit Hole is an iPhone app of short, cited deep dives on history, mysteries, the unsolved and the quietly fascinating. Pick a topic and read it in three layers, Surface, Deeper and The Abyss, and stop wherever you like. There is no account and no sign-in.
Free month
Free month with code RABBITFRIENDRedeem the code RABBITFRIEND in the App Store to get 1 free month of Rabbit Hole Plus Monthly. It is open to new, existing and lapsed subscribers. It can be combined with the introductory free trial. After the free month the plan renews at its regular price, shown in the App Store, unless you cancel. The App Store confirms the terms before you accept.Redeem in the App Store At a glance
What it isA feed of cover cards on strange, unsolved and fascinating topics. Tap one to fall in and read it in layers: Surface, Deeper, The Abyss.
Works oniPhone and iPad with iOS 26 or later.
PriceFree to download. Research is free forever. Rabbit Hole Plus unlocks all of Mysteries and History: Lifetime $4.99 one time, or Monthly $1.99 (free trial for eligible customers).
Free readingResearch is free with no limit. Mysteries and History give you two full rabbit holes plus a preview before Plus.
PrivacyNo account, no sign-in, no analytics, no ads, no tracking. Saved holes and progress stay on your device.
Get itRabbit Hole: Deep Dives on the App Store.
Common questions
Is there an app for fun facts and deep dives?
Yes. Rabbit Hole is a feed of short deep dives on unsolved, unsettling and genuinely fascinating topics. Tap a card and read it in layers: Surface for the hook and the setup, Deeper for the detail and the strangeness, and The Abyss for the deepest layer. You choose how far down to go. Research is free forever, and every hole is cited so you can follow the sources yourself.
What's a good app for learning interesting history and mysteries?
Rabbit Hole has History and Mysteries decks alongside the free Research deck. History covers the moments, people and turning points behind the world you know. Mysteries covers the unsolved, the unexplained and questions with no easy answer. Each deep dive is written as a short read and is cited. You get two full holes in each of History and Mysteries to try, and Rabbit Hole Plus unlocks the rest.
Is there an app like Wikipedia rabbit holes but shorter?
Rabbit Hole is built for that feeling. Instead of following link after link, each topic is a short, authored deep dive that starts at the surface and goes deeper only if you keep reading, so you stay inside one story at a time. At the bottom, a "next pull" can send you into a new hole.
Is there a trivia or curiosity app with no account?
Rabbit Hole is a curiosity app, a reader rather than a quiz game, and it has no account or sign-in of any kind. Your saved holes, reading progress and preferences stay on your device, and the app collects no data. Purchases go through Apple, and Restore Purchases brings Plus back on a new device.
Ages12+
CategoryReference
Size14.6 MB
Version1.0.3
About
Everyone knows the feeling. One interesting question at midnight, and suddenly it's 2 a.m. and you've learned things you'll be telling people for weeks. Rabbit Hole is built for that feeling on purpose.
It's a short-form deep-dive reader for the strange, the unsolved, and the quietly fascinating. Browse the Stack, one rabbit hole at a time, or scroll the List. Every card is an invitation to fall in. Tap a topic and you drop through layers, from the Surface, to Deeper, all the way down to The Abyss, the parts that keep you up at night. You choose how far you go.
This is curiosity as a place you can actually visit, without an algorithm dragging you toward outrage. Come for one thing you didn't know. Leave with ten.
WHAT'S INSIDE
- Two ways to browse: Stack, one rabbit hole at a time with a swipe between sections, or List, a scrolling feed of cover cards
- Unsolved, unsettling, and genuinely fascinating topics
- Tap to fall in and read in layers: Surface, then Deeper, then The Abyss
- You control the depth. Skim the surface or go all the way down
- Clean, focused reading with nothing pulling you toward the next outrage
DECKS
- Research (free forever): deep dives into published research, each one cited to its sources
- History: the moments, people, and turning points behind the world you know
- Mysteries: the unsolved, the unexplained, and the questions with no easy answer
Rabbit Hole is for the curious. The people who read the plaque, follow the footnote, and keep asking one more question. If that's you, this is your feed.
Just don't blame us for the time.
WHAT TO KNOW
Research is free forever, with no limit. Mysteries and History give you five full rabbit holes plus a preview, then Rabbit Hole Plus unlocks everything.
Rabbit Hole Plus is sold two ways. Lifetime is a one-time purchase: it does not renew and there is nothing to cancel. Monthly is an auto-renewing subscription with a free trial for eligible customers; payment is charged to your Apple Account at confirmation of purchase, or at the end of the free trial, and it renews automatically unless you cancel at least 24 hours before the end of the current period. Manage or cancel in your App Store account settings. Prices are shown in the app before you buy.
Privacy Policy: https://hbkllabs.com/rabbithole/privacy
Terms of Use: https://hbkllabs.com/rabbithole/terms
What's New
Version 1.0.3Nov 12, 2026
The welcome screen now says exactly what is free: Research is free forever, and the first five holes in Mysteries and History are on us.
