# Detections (FAQ)

## Why is there no data for a specific timeline?

**I have installed the app less than 3 days ago**\
Our platform needs a certain amount of data before we can start identifying your events, moments & segments correctly. Please make sure you've been tracking with the permissions set correctly for at least a few days. Specific venues, like home and work, could take up to a week to detect correctly.

**I have installed the app more than 3 days ago**\
Make sure your device has the required specifications. The device must have an accelerometer at the least and it is best if it also has a gyroscope present.\
Make sure you've given the right [permissions](/a-complete-integration/android-sdk/permissions.md).

Also, specific android devices may require whitelisting.\
If none of this works or you need more information, contact <support@sentiance.com> for assistance.

## **Why is a trip incorrectly or not at all detected?**

When a trip is incorrectly detected or not detected at all, it might be because:

* The phone was in flight mode during the trip.
* The trip was very short in duration (< 3 min).
* The trip was very short in distance (< 2 km or 1.25 mi).
* The phone was in battery-saving mode during the trip.
* The app did not get the required permissions (always-on) during the trip.

## **Why was phone usage falsely detected during a trip?**

Our algorithm that detects phone usage while driving might sometimes detect phone usage when the phone is moving in the pocket while driving, or when it hits a sequence of speed bumps. We optimize for precision. i.e. it should happen less than 10% of the time. \\


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