# Trackers pricing
<a name="trackers-pricing"></a>

For pricing information for tracking and geofencing APIs, see the [Amazon Location Service pricing page](https://aws.amazon.com/location/pricing/). 

**Position Written**

You can use `BatchUpdateDevicePosition` to upload position update data for one or more devices to a tracker resource (up to ten devices per batch). Price is based on the number of device positions in your API request. Unit price per device position update is based on the total monthly usage volume. See the [Amazon Location Service pricing page](https://aws.amazon.com/location/pricing/) for details on unit price and volume tiers.

You can optimize your Position Written cost by configuring the device position update frequency (also known as ping rate) from your tracking devices, and optionally use a local filter to only upload relevant device position updates to Amazon Location Service. 

**Position Read**

You can use `BatchGetDevicePosition` to lists the latest device positions for requested devices, up to 100 devices per request. You can also use `GetDevicePosition` to retrieve a device's most recent position according to its sample time. 

Price is based on the number of API requests.

**Position Delete**

You can use `BatchDeleteDevicePositionHistory` to delete the position history of one or more devices from a tracker resource, up to 100 devices per request. 

Price is based on the number of devices in your API request.

**Position Integrity Evaluation**

You can use `VerifyDevicePosition` to verify the integrity of the device's position by determining if it was reported behind a proxy, and by comparing it to an inferred position estimated based on the device's state. 

Price is based on the number of API requests.