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Developer Guide

Screen Resolution

When you're developing web content for Amazon Silk (or any other mobile browser), it's a good idea to be aware of devices' screen resolution and related specifications. The following table shows screen size, product model, resolution, and scale factor for Fire tablets and phone. For full device specs, see Device and Feature Specifications.

Device Screen size Product model Screen resolution (px) Scale factor
Fire HD 10 (5th Gen) 10.1-inch screen KFTBWI — Wi-Fi 1280 x 800 1.0 (mdpi)
Fire HD 8 (5th Gen) 8-inch screen KFMEWI — Wi-Fi 1280 x 800 1.3 (tvdpi)
Fire (5th Gen) 7-inch screen KFFOWI — Wi-Fi 1024 x 600 1 (mdpi)
Fire HDX 8.9 (4th Gen) 8.9-inch screen KFSAWI — Wi-Fi

KFSAWA — Wi-Fi + 4G LTE

2560 x 1600 2.0 (xhdpi)
Fire HD 7 (4th Gen) 7-inch screen KFASWI — Wi-Fi 1280 x 800 1.5 (hdpi)
Fire HD 6 (4th Gen) 6-inch screen KFARWI — Wi-Fi 1280 x 800 1.5 (hdpi)
Fire Phone 4.7-inch screen SD4930UR 1280 x 720 2.0 (xhdpi)
Kindle Fire HDX 8.9 (3rd Gen) 8.9-inch screen KFAPWI — Wi-Fi

KFAPWA — Wi-Fi + 4G LTE

2560 x 1600 2.0 (xhdpi)
Kindle Fire HDX 7 (3rd Gen) 7-inch screen KFTHWI — Wi-Fi

KFTHWA — Wi-Fi + 4G LTE

1920 x 1200 2.0 (xhdpi)
Kindle Fire HD 7 (3rd Gen) 7-inch screen KFSOWI — Wi-Fi 1280 x 800 1.5 (hdpi)
Kindle Fire HD 8.9 (2nd Gen) 8.9-inch screen KFJWI — Wi-Fi

KFJWA — Wi-Fi + 4G LTE

1920 x 1200 1.5 (hdpi)
Kindle Fire HD 7 (2nd Gen) 7-inch screen KFTT — Wi-Fi 1280 x 800 1.5 (hdpi)
Kindle Fire (2nd Gen) 7-inch screen KFOT — Wi-Fi 1024 x 600 1.0 (mdpi)
Kindle Fire (1st Gen) 7-inch screen KFOT — Wi-Fi 1024 x 600 1.0 (mdpi)

You can use the Silk user agent strings to detect a particular Fire device and target the user experience accordingly. For more information about the Silk user agent string, see User Agent Strings and Detection.

Keep in mind the following when developing web content for Silk and Fire devices:

  • The viewport is the portion of the browser dedicated to displaying the webpage. Viewport size and screen size for mobile devices are not necessarily identical. They differ because the browser uses up some screen real estate to show its chrome. You can use the viewport meta element to specify attributes of the viewport, including width and height.

  • With a mobile form factor, HTML forms can be challenging for users to complete. You can use HTML5 input types to make forms more responsive.

  • You can use media queries to style your site for a specific screen resolution.

For more information about Fire device specifications, see the Device and Feature Specifications (tablets) and Fire Phone Specifications pages on the Amazon Apps & Games Developer Portal. To learn more about scale factor, see Screen Layout and Resolution.