Cairn: Your Second Brain · Office #65,558

What it is

Calls itself “second brain”.

• Calls itself: second brain

“Not a journal. Not a notes app. A second brain”

What it costs

One-time purchase. A free tier, free forever. Trial: “14 days”. No monthly or yearly plan. Prices quoted: $14.99.

• One-time: yes
• Monthly: no
• Yearly: no
• Free plan: free forever
• Price: $14.99
• Trial: 14 days

“Cairn+ Lifetime $14.99”

“After that, Cairn+ is one payment, yours for good. No subscription.”

“After that, Cairn+ is one payment, yours for good.”

Who it sells to

Sells to consumers. In English.

• Sells to: consumers
• Languages: English

“Cairn is a second brain for every random thought.”

“Language EN English”

How it runs

A mobile app for iOS. Runs locally and works offline. Distributed through the App Store. AI is the core of the product.

• Kind: mobile
• Runs on: iOS
• Runs where: on the device, offline
• Distributed via: App Store
• AI role: core to the product

“Works on iPhone and iPad.”

“Requires iOS 18.0 or later. iPhone Requires iOS 18.0 or later. iPad Requires iPadOS 18.0 or later.”

What it works with

Integrates with Apple Intelligence, Face ID, Siri and 1 more. Names App Store on its pages.

• Integrates with: Apple Intelligence · Face ID · Siri · +1
• Names: App Store

“Cairn: Your Second Brain App - App Store”

“With Apple Intelligence, themes get names”

What it offers as proof

Live, no waitlist. Try it without signing up.

• Instant signup: yes
• Trial asks for: nothing

“Dump it into Cairn in seconds”

“Every new user gets all of Cairn+ free for 14 days, no card, nothing to cancel.”