Local-First PsychologyTools

Psychology tools handle some of the most sensitive data imaginable — your fears, your relationships, your unfiltered thoughts. That data shouldn't live on a server in Virginia.

The Local-First Architecture

When you write in 4Angles, your data is stored in IndexedDB on your device. It never leaves your browser unless you explicitly sync it.

• Instant — No network latency. Writes happen in <10ms.
• Private — Data stays on your device by default.
• Offline — Works without internet. Sync when you're ready.
• Yours — Export everything. Delete everything. You're in control.

Sync is Optional

If you want to access your journal across devices, you can enable sync. But it's encrypted end-to-end. We can't read your entries even if we wanted to.

Most apps make the cloud the default and local an afterthought. We inverted that.