sanity-check.app Get the app
Live on the App Store · iOS 17+

Your idea
probably sucks. Let's find out.

Sanity Check is the AI that delivers brutal, honest critiques of your ideas — no cheerleading, no participation trophies, no "great question!" Just the truth, delivered with style.

Download on the App Store See the receipts ↓
First critique free $4.99/mo Pro No fake encouragement
Receipts

Actual critiques.
Not screenshots of LinkedIn.

A few real examples of what Sanity Check has delivered. Your results will not be better.

1
Demolished
Startup Pitch
Blockchain-Based Restaurant Reviews
The Premise

You want to put restaurant reviews on a blockchain so nobody can tamper with them. Your pitch deck almost certainly contains the word "trustless."

The Problem

Yelp polices fake reviews with ML models and lawsuits, not cryptography. Your fake reviews are still fake — they're just now permanently fake, and you paid gas fees to make them that way.

The Math

A restaurant's marketing budget doesn't stretch to $14 of on-chain gas per verified review, so you'll need to subsidize writes. Which means you are now a payment processor, not a review platform, and your runway is…

Read the full critique in the app

"Nothing says 'I had a nice pasta' quite like an immutable ledger entry and $14 in gas fees."

2
Demolished
Business Idea
Uber for Dog Walking

"You've invented Wag, Rover, and every neighborhood kid's summer job, but with venture capital burn rate."

5
Shaky
Hot Take
AI Will Replace All Lawyers

"Bold claim from someone who clearly hasn't read a terms of service, let alone argued one in court."

6
Shaky
Creative Work
A Podcast Where I Interview My Cat

"Surprisingly, your cat's refusal to engage is more compelling content than most podcasts. The bar is that low."

8
Survived
Life Decision
Quit My Job to Open a Bookshop

"Against all odds, the math isn't terrible. You might actually pull this off — if you skip the cafe."

Sample critiques · your results may vary (they won't be better) Submit your own idea →
The Process

Type an idea.
Get the truth.

No "workflow." No onboarding sequence. Just you, your idea, and an AI with no regard for your feelings.

01

Describe your idea

A startup pitch, a career pivot, a bold take. Title, a paragraph, a category. Ninety seconds, tops.

02

Get absolutely roasted

A structured critique with a score out of 10, a verdict, and a one-liner you will immediately want to screenshot.

03

Decide what to do

Quit your job, pivot the pitch, or shelve it forever. At least now you know where you stand.

Pricing

First critique free. Pro is $4.99/mo for 30 critiques. Need more? $1.99 buys 15 extras that never expire.

Get the app →

Stop asking
your friends.

Your friends will tell you it's a great idea because they are nice and they want to go to brunch. Sanity Check has no such obligation.

Download on the App Store
First critique Free
Pro · 30 critiques/mo $4.99
Booster · 15 extras $1.99
Subscriptions to your self-esteem $0