Built on what's known
We don't train models. The best ones have already read the library, so our time goes to the part they're missing: your day.
Independent AI app studio
Knowledge, zipped. Life, unfolded.
A brain folds a lifetime into its cortex. Language models folded everything we have ever written into weights. CortexZip unfolds that knowledge into small apps for everyday life.
scroll to zip
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knowledge footprint
1,000 TB of text
1× condensed
01 Every book, paper, recipe and line of code we have ever written.
02 Training zips it together, seam by seam of meaning.
03 It falls inward, past the point of no return.
04 What remains is a singularity: all of it, in a few hundred gigabytes.
Principles
We don't start from zero.
We start from everything.
Small, not shallow
One app, one job, done in seconds. Behind a simple screen sits a model that knows more than any manual.
Yours stays yours
Your life isn't training data. What can stay on your phone stays there; what leaves is only what a feature needs, and we say so plainly.
AI with manners
It runs when you tap, not in the background. Where a plain button does the job better, you get a plain button.
How we build
Unzipped,
one app at a time.
- → notice
Find a small, daily friction
Receipts, renewals, forms, lists: the repeated little jobs that quietly eat a week. That's where we start.
- → unzip
Borrow what the models already know
We build on existing cloud and on-device models, picked per feature for speed, cost and privacy. No training of our own, so every hour goes into the app.
- → unfold
Ship something calm
A clear job, done in seconds. AI when you ask for it, and a sensible fallback when the network doesn't answer.
05 Then the core ignites, and knowledge streams back out.
06 Where it cools, small bright things condense. Apps you can hold.
07 One core.
A galaxy of apps.
apps in orbit
00 launching +8 forming
one shared core
- Pennydance: launching, the first app to condense
- Eight more apps: still forming
First light
Pennydance
Every penny, remembered.
Our first app is a private spending tracker for Android and iPhone. Type or say what you bought and it's logged in seconds. Snap a receipt and AI turns it into line items. No ads, no bank login, no account: the ledger stays on your phone.
- 0 ads
- 0 bank logins
- 0 accounts
- 1 phone
Coming to Google Play first, then the App Store.
Commissions
Something worth unzipping?
We mostly build our own apps. Now and then we take on a commission: an AI feature for an everyday tool, built with the same care.
support@cortexzip.com
Plain answers
In plain words.
What is CortexZip?
CortexZip LLC is an independent software studio that builds small AI apps for everyday life. We don't train our own models: we build on existing cloud and on-device models and put the work into the app itself.
What is Pennydance?
Pennydance is CortexZip's first app: a private spending tracker for Android and iPhone. Type or say what you bought and it's logged in seconds; with Premium, AI turns a receipt photo into line items. No ads, no bank login, no account. Learn more at pennydance.com.
Is Pennydance free?
Yes. The Free plan costs nothing, and no plan shows ads. Paid plans add unlimited entries, renewal reminders and AI receipt scanning; current prices are on pennydance.com.
Where does Pennydance keep my data?
On your phone. There is no account and no bank login, and our servers don't keep your ledger. AI runs only when you tap it, through a relay that keeps nothing.
When can I download Pennydance?
Pennydance is coming to Google Play first, then the App Store. Launch news is on pennydance.com.
Does CortexZip build apps for other companies?
Sometimes. We mostly build our own apps, but now and then we take on a commission: an AI feature for an everyday tool. Write to support@cortexzip.com.