What Is the Real World Accuracy of Phone Accelerometers When Used for Positioning

What is the real world accuracy of phone accelerometers when used for positioning?

If you integrate the accelerometer values twice you get position but the error is horrible. It is useless in practice.

Here is an explanation why (Google Tech Talk) at 23:20.

I answered a similar question.

Accuracy of Accelerometer sensor provided by Android

No, the accelerometer is not accurate enough, see my previous answer at Android accelerometer accuracy (Inertial navigation).

This question pops up surprisingly often, see for example Distance moved by Accelerometer for a collection of similar questions.

Android accelerometer accuracy (Inertial navigation)

You get position by integrating the linear acceleration twice but the error is horrible. It is useless in practice.

Here is an explanation why (Google Tech Talk) at 23:20. I highly recommend this video.

It is not the accelerometer noise that causes the problem but the gyro white noise, see subsection 6.2.3 Propagation of Errors. (By the way, you will need the gyroscopes too.)

As for indoor positioning, I have found these useful:

RSSI-Based Indoor Localization and Tracking Using Sigma-Point Kalman Smoothers

Pedestrian Tracking with Shoe-Mounted Inertial Sensors

Enhancing the Performance of Pedometers Using a Single Accelerometer

I have no idea how these methods would perform in real-life applications or how to turn them into a nice Android app.

A similar question is this.

UPDATE:

Apparently there is a newer version than the above Oliver J. Woodman, "An introduction to inertial navigation", his PhD thesis:

Pedestrian Localisation for Indoor Environments

Distance moved by Accelerometer

You get position by integrating the linear acceleration twice but the error is horrible. It is useless in practice.

Here is an explanation why (Google Tech Talk) at 23:20. I highly recommend this video.

However the gyro mouse might work for your application, see between 37:00-38:25 in the video.

Does we have possibility to get current speed in android without GPS?

Accurate speed measurements require some form of distance/time calculation, unless you want to play some hairy games with the accelerometer and don't mind being completely wrong.

See e.g., http://www.chrobotics.com/library/accel-position-velocity

Indoor Positioning System based on Gyroscope and Accelerometer

Gyros and accelerometers are not enough.

You get position by integrating the linear acceleration twice but the error is horrible. It is useless in practice.

Here is an explanation by (Google Tech Talk) at 23:20. I highly recommend this video.

As for indoor positioning, I have found these useful:

RSSI-Based Indoor Localization and Tracking Using Sigma-Point Kalman Smoothers
Pedestrian Tracking with Shoe-Mounted Inertial Sensors
Enhancing the Performance of Pedometers Using a Single Accelerometer

I have no idea how these methods would perform in real-life applications or how to turn them into a nice Android app.

A similar question is Calculating distance within a building.

Android accelerometer detect height?

Assuming you mean you want to detect the height the phone was raised from its staring point, yes. The android accelerometer measures force, more info on how to use it can be found here. Keep in mind that the accelerometer isn't a perfect device, and so your results will be approximations of how much the phone was really moved.

track small movements of iphone with no GPS

If you integrate the acceleration twice you get position but the error is horrible. It is useless in practice.

Here is an explanation why (Google Tech Talk) at 23:20. I highly recommend this video.

I answered a similar question here and here.

What Is the Real World Accuracy of Phone Accelerometers When Used for Positioning