"I saved 800 tabs and never reopened one. So I built the opposite of a cloud notes app, a second brain that can't phone home. Your device is enough."Third Party Apps, a Third Party Services LLC studio
One private place for every link, note, and idea, stored in a database that lives only on your phone. No account. No cloud. No one else. Search it in a second, export it any time.
127 captures · on this device
Every other notes app asks you to trust a privacy policy. Braintrust removes the need to.
There's no account to log into, no server to sync to, and no networking code in the app at all. So there is physically nothing to leak, breach, subpoena, or sell. Its privacy isn't a promise a business model can revoke later. It's the way the app is built.
Built by a one-person studio that runs its whole AI operation on the same pattern: a local database and a handful of small processors, each doing one job. Braintrust is that idea, shrunk to fit your pocket and locked to your device.
No AI theater, no cloud, no learning curve. Just fast, private capture that works offline and hands your data back whenever you ask.
Type or paste a link, note, or idea. Braintrust detects whether it's a link, a social post, or plain text and files it, instantly and offline.
Everything you save, newest first. Filter by type, pull to refresh, long-press to archive or delete. No folders to maintain.
Instant search across titles, text, tags, and links, with your matches highlighted. Find something you saved 200 captures ago in a second.
Add your own tags, or take one-tap keyword suggestions generated on your device. Filter your whole library by any tag.
One tap sends your whole library to a JSON file you own, and imports it back just as easily. No lock-in, and export is always free.
Your captures live in a local SQLite database on your phone. No login, no sync, no network calls. Uninstall and it's gone; there's no copy anywhere else.
Type or paste anything worth keeping, a link, a thought, a snippet. It's saved instantly, without a connection.
Braintrust auto-detects the type and you tag it in a tap. It drops into your feed, ready to filter.
Search or filter across everything you've ever saved. Take the whole library with you as a file, whenever you want.
This is what the Play Store data-safety section shows for Braintrust. It isn't marketing language, it's the review outcome of an app that has no data to collect.
com.thirdpartyapps.braintrust
You don't want your saved thinking sitting in someone else's account. On-device is the whole point.
Links, snippets, and ideas pile up fast. Capture them offline and grep your own brain in a second.
Notes and article links in one private, searchable place. Free, offline, no account to make.
Tired of lock-in and price hikes? Import a JSON, keep it local, and own every byte.
No vaporware. Here's exactly where Braintrust is, so you know what you're getting on day one and where it's going.
Everything on this page works today, fully offline, on your phone.
Share a link or note straight from your browser or any app, into Braintrust, still 100% on-device.
Local auto-tag rules, quick-capture widgets, and optional sync where the server is yours, never ours.
Free at launch. Free forever for the core. If Braintrust ever offers more, it's a one-time unlock, never a subscription, and saving, searching, and exporting your data stays free.
"I saved 800 tabs and never reopened one. So I built the opposite of a cloud notes app, a second brain that can't phone home. Your device is enough."Third Party Apps, a Third Party Services LLC studio
Braintrust is in review at Google Play right now. Leave your email and we'll send one message the moment it's live.