← All Apple listings

Acceleration

by Kevin Power more by this developer →

View in the Apple store ↗

Compare with another extension

Category: Lifestyle

Description

'Acceleration' is special in two ways.

First, it processes the readings from your built-in accelerometers in real time to show only horizontal acceleration.

Second, it takes data directly from your built-in accelerometers, sidestepping built-in smoothing.

Created originally to help EV drivers who were concerned that their brake lights were coming on inappropriately during regenerative braking, it can also be used to display braking and acceleration performance.

It's a small app that's easy to use. You don't have to sign-in, there aren't any ads and an internet connection isn't needed.

To use the app, set your device in one fixed place. Tap 'Calibrate' to let the app find the size and direction of gravity.

Horizontal acceleration is now displayed.

When 'Record' is tapped, for the next 13 seconds a scatter graph of calculated readings is displayed. Two green arrows let you increase or decrease the vertical scale of the graph.

By default, unsmoothed data from your accelerometers is used. Tapping the 'Smooth' button continuously averages the last last ten readings. This helps to manage results.

To help check the correct function of brake lights during regeneration, the 'Lamp' button displays a panel that changes from blue to yellow at 0.7m/s/s, and to red at 1.3m/s/s.

Upgrading will let you save your sets of data to look at later. You can also export full-sized pictures of graphs into your camera roll. However, apart from this, the free version of this app is fully functional.

This app takes raw data from the accelerometers - not the processed data provided by the operating system. When 'Calibrate' is pressed, the magnitude and direction of gravity is measured, relative to the device. The app then continues to collect data from the accelerometers, mathematically projecting it onto the plane perpendicular to the original gravity vector.

It reports the magnitude of this projected vector.

This process produces a reliable result for horizontal acceleration, whilst making you aware of jitter and sensitivity.

Alternatives to Acceleration

Name	Ratings	Rating
Acceleration Church by KINGDOM ACCELERATION INC	5	5.0	compare
Zillow Real Estate & Rentals by Zillow, Inc.	7,235,511	4.8	compare
Amazon Alexa by AMZN Mobile LLC	5,886,580	4.5	compare
Pinterest by Pinterest, Inc.	5,771,380	4.8	compare
Nest by Nest Labs, Inc	2,565,037	4.6	compare
myQ Garage & Access Control by The Chamberlain Group, Inc.	2,405,246	4.8	compare
Ring - Always Home by Bot Home Automation, INC	1,847,426	4.7	compare
Bumble Dating App: Meet & Date by Bumble Holding Limited	1,762,381	4.3	compare
Tinder Dating App: Date & Chat by Tinder LLC	1,748,960	4.2	compare
Redfin: Buy, Sell & Rent Homes by Redfin Corporation	1,635,858	4.8	compare

Growth

Change in ratings, scaled to each window from the real gap between crawls. A window needs a full period of history before it reports anything.

History

Tracking since 09/05/2026. History accumulates as changes are observed — check back soon.