Slowglass

Long exposures that build while you watch

Put the phone somewhere steady, tap once, and watch tail lights draw across the screen.

Get it on Google Play

Slowglass building light trails from a night street, 54 seconds into a one minute exposure

A waterfall turned to mist, saved to Pictures/Slowglass

Five ways to slow the glass

Trails: Headlights draw lines across the frame.
Water: Waterfalls and waves turn to mist.
Motion: Traffic smears while street lights stay sharp.
Stars: Bright stars and planets drawn into arcs over a long session.
Lightning: Each strike saved from the frames just before the flash.

It tells you what your phone can do

A five second camera check on first launch measures the stream size, the frame rate while stacking, and whether star settings work. Photos save at the size the camera streams to the app, often 1920 x 1080, and Slowglass never calls that full resolution.

The check runs on your own phone, so you know the result before you rely on it.

The camera check result: stream size, frame rate, precision and focus — The camera check on first launch.

Lightning mode saving its third strike — Lightning, third strike saved.

One-time purchase. No ads, no subscription, no account. Works fully offline.

USD 2.99 once, INR 149 in India. Everything is included.

Slowglass has no internet permission. Your photos are ordinary files in Pictures/Slowglass, and the session log exports to JSON or CSV whenever you want it.