MountainRiver
PRIVATE BY NATURE
A journal that never
leaves your Mac.

MountainRiver reads across everything you’ve written and reflects your life back to you. This is the version where all of that happens on your own machine — your words read by a mind that never leaves your Mac. No cloud. No account. Nothing to leak.

On your device
A model small enough to run on Apple Silicon does the reflecting, right there on your Mac — the same recognition, kept close.
Nothing leaves
Your entries never touch a server, never reach me, never train anything. The most private thing you keep stays entirely yours.
Yours to keep
A journal you own outright — no subscription tether, no company between you and a lifetime of your own writing.
THE DEAL
If enough of you want it, I’ll build it.

A fully private, on-device version is a real piece of work, so I won’t build it into a void. Here’s the honest deal: leave your email below, and the moment 50 people have raised their hand, I start building — and you’ll be the first to know. No spam, no drip, just one message when it’s real.

0 of 50 builders
When we reach 50, it goes into development.
Which machine are you on?
What would you pay? (optional)
You’re in.
Thank you — that genuinely moves this forward. I’ll email you the moment we hit 50 and it goes into build. Until then, nothing in your inbox from me.

I’ve kept a journal for over a decade, and the thing I most want from software like this is the quiet certainty that no one is reading over my shoulder. A version that lives entirely on your own machine is the truest form of that promise. If it’s something you’d want too, put your name down — and let’s see if there are fifty of us.

— Tommy
MOUNTAINRIVER · 2026 PRIVACY PARTNERS PRICING