Sentio turns the microphone, cameras, torch, vibration motor and accelerometer you already carry into measurement instruments — tap tests, sound spectra, color and light readings, all analyzed on the device. The Android app is finished enough to use and is now in closed testing on Google Play.
A Google account and two clicks. Free, no ads, nothing to buy, no data leaves your phone unless you sign in.
The order matters: Google Play only lets you in once you are in the tester group.
Open the Sentio testers group and join it with the Google account your phone uses. That account is what Google Play checks.
Open the opt-in link and accept. If it says you are not a tester, you joined the group with a different account, or Play has not caught up yet — wait a few minutes and reload.
The same page then offers a Play Store link. Install from there, open the app, and measure something. Actually opening it matters — a test nobody uses does not count.
Every capture is analyzed on your phone, in under a second, offline.
Knock on a melon, a wall, a wine glass, a wooden table. The app listens to how the sound decays and reads resonance and damping out of it.
A running fridge, a laptop fan, a room's hum. The same tool that runs in the web app, at raw 48kHz on the phone's unprocessed microphone.
Paint, produce, a desk at three times of day, a plant's corner of the room — with the camera's exposure and white balance locked so two readings can be compared.
Sound insulation through a door, transparency of a pane of glass, polarization of sunglasses: measure with the sample and without, and read the ratio.
Anything that broke, anything that confused you, and anything your phone did that ours did not — with the phone model, if you can. Write to info@sntio.org. On iPhone there is nothing to opt into — the iOS app is on the App Store — and the web app works in any browser today.