Utility app using phone sensors

Who it is for

People who need a simple measurement at home, offline and without an account.

What it solves

A measurement should work straight away, offline and without signing up.

Our role

The whole product: app, native plugin and website

What was built

• Our own Flutter plugin with native code in Kotlin and Swift
• Accelerometer, gyroscope and gravity sensor readings
• Calibration, a custom reference point and reading hold
• A view chosen automatically from the phone’s position
• Native unit tests and tests on a real device
• No ads, analytics or account, with screen reader labels

Technologies

Flutter, Kotlin, Swift, TypeScript

What it is

A utility app that turns the phone’s motion sensors into a measuring tool. It works offline and without an account.

Native plugin

Readings come from our own plugin, written in Kotlin for Android and in Swift for iOS. It uses the accelerometer, gyroscope and gravity sensor. The interface between Flutter and the native code is generated, so both sides share the same types.

Accuracy and tests

The result depends on the phone’s sensors, so the app offers calibration from two readings. The native code has unit tests, and tests on a real device check the whole app. The app collects no data: it has no ads, analytics or account.