A product of TimeGround

A quiet space for your days.

Sundial is a calm, private diary. Write for any day — with no date lockout — add a mood, and keep it all on your device.

No account. No ads. Nothing leaves your phone.

Sundial home screen showing a diary timeline

Simple. Minimal. Yours.

Everything a diary should be — and nothing it shouldn't.

Thoughtful features that stay out of your way, so writing feels effortless.

Write for any day

Backfill yesterday or a moment from months ago. There's no date lockout and no streak to protect.

Gentle moods

Add an optional mood to any entry and see how your days have felt, at a glance.

Calendar view

A soft month calendar marks the days you've written, so you can wander back anytime.

Instant search

Find any memory by a word in its title or text — results appear as you type.

Four warm themes

Warm & cozy, Calm & minimal, Soft & elegant, or Classic ink — each in light and dark.

Private & offline

Everything stays on your device. Optional fingerprint/PIN lock, plus backup & export you control.

Make it yours

Four calm themes, light or dark.

Pick the mood that suits you. Each theme is hand-tuned to be easy on the eyes.

Warm & cozy

Amber on warm cream

Calm & minimal

Sage on off-white

Soft & elegant

Lavender on neutral

Classic ink

Ink on paper

Private by design.

Sundial has no accounts, no ads, and no tracking. Your entries live in a private database on your device — the app doesn't even ask for internet permission to write. Back up on your terms with export or your own Google Drive.

No account No ads or tracking On-device storage Optional app lock Export & backup

Start marking your days, gently.

Sundial is free. A product of TimeGround.

Get it on Google Play