Read one idea per swipe
Cards are written for a phone screen: a specific hook, the explanation and a payoff. Curio is not the audio-journalism service at curio.io.
Official first-party guide
What is the Curio app?
Curio: Feed Your Curiosity is a short-form reading app by Leon Kelvin Li. It turns the familiar vertical swipe into written rabbit holes: one focused idea at a time, with optional ways to explore it further.
Published and last checked August 22, 2026 · Public iOS version 1.0.7
The short answer
Curio is live on iPhone, free to start, and does not require an account to read. Curio Pro costs $12.99 a month or $149.99 a year in the United States. The app supports English, Simplified Chinese, Spanish and Portuguese. Android is in closed testing and is not publicly downloadable yet.
Curio at a glance
| Official name | Curio: Feed Your Curiosity |
|---|---|
| What it is | A full-screen feed of short written cards and stories across science, history, psychology, nature, strange facts and other curiosity topics. |
| Developer | Leon Kelvin Li |
| Official identifiers | trycurio.app and Apple App Store ID 6781121127. Curio at curio.io and curi.ooo are unrelated products. |
| Availability | Public on iPhone. Android is in a closed Google Play test, not a public release. |
| Languages | English, Simplified Chinese, Spanish and Portuguese inside the app. |
| Free plan | Free to start, with no account needed to read. Some categories and features are limited. |
| Curio Pro | $12.99/month or $149.99/year in the United States. The App Store shows the final local price and any eligible trial before confirmation. |
How Curio works
Choose or build a rabbit hole
Browse the general feed, follow interests, or ask Curio to build a focused feed around a topic. Generated and AI-assisted output is labeled in the app.
Open the depth layer
When an idea catches you, Curio can explain it more simply, go deeper, quiz you, or turn the next step into a learning path. AI tools have plan and fair-use limits.
Keep what is useful
Save, share and revisit cards. Offline access and broader reading access are part of Pro; exact entitlements are shown before purchase.
Is Curio free, and what does Pro cost?
Curio is free to download and free to start. Reading does not require an account. The free plan has limits on some categories, saved and offline items, custom feeds and AI usage. Curio Pro unlocks the broader paid experience with fair-use limits on generated and AI features.
The verified United States prices are $12.99 per month or $149.99 per year. Eligible new subscribers may be offered a three-day trial. Apple displays the authoritative local price, trial eligibility and renewal terms before the purchase is confirmed. Subscriptions can be managed or canceled in Apple ID settings. Read the subscription terms for the complete conditions.
Where can you download Curio?
iPhone: available now
The public app is Curio: Feed Your Curiosity by Leon Kelvin Li. Match the developer, domain and App Store ID rather than the word “Curio” alone.
Android: closed test
There is no public Curio download on Google Play yet. The Android build is in a closed test. See the official Android status page to request an invitation or launch notice.
Is this a Curio review?
No. This is a first-party product guide written by Curio's founder, so it should be used for current product facts—not as an independent verdict. As of this page's verification date, the App Store had only one public rating, which is not enough evidence for a meaningful reputation claim. For problems, billing questions or complaints, use Curio Support. Curio does not publish invented testimonials or turn a tiny sample into a review score.
Common Curio app questions
What is the Curio app?
Curio: Feed Your Curiosity is a short-form reading app made by Leon Kelvin Li. It presents written curiosity cards and stories in a full-screen swipe feed, with optional tools to explore a topic more deeply.
Is Curio free?
Curio is free to start and no account is required to read. Some categories and features are limited on the free plan. Curio Pro is optional.
How much is Curio Pro?
Curio Pro is $12.99 per month or $149.99 per year in the United States as verified on August 22, 2026. Apple shows the final local price before purchase.
Is Curio available on Android?
Not publicly yet. Curio is live on iPhone and the Android build is in a closed Google Play test. There is no public Android download link as of August 22, 2026.
Who makes Curio?
Curio is designed and developed by Leon Kelvin Li. The official website is trycurio.app and the official Apple App Store ID is 6781121127.
Short rabbit holes worth finishing.
Try Curio free on iPhone, or compare it honestly with other short-form reading apps before deciding.