1. For android users, Kiwi Browser is an open source browser based on Chromium, Google's open source version of Chrome. It is one of the very few browsers that fully support extensions on mobile.

* Note: Kiwi Browser is no longer available on the Google Play Store. While Kiwi's code is being integrated into the Microsoft Edge browser, you can download and install the last available version of Kiwi Browser from the Kiwi Browser GitHub download page. You will need to choose one of the first four .apk files depending on your device's architecture (arm, arm64, x64, or x86). You may need to enable "Install unknown apps" in your phone's settings to install it.

• Install: From the Kiwi Browser, follow the Desktop installation instruction from above to install Smooth Reader.
• Sign in: Once installed, you can quickly access the Smooth Reader options from the bottom of the main menu by tapping the three vertical dots at the top right corner of the browser window and scroll to the very bottom. From the Smooth Reader options screen, tap the white profile icon at the top right corner and sign in via Google or API key.

2. For  iOS  users, Orion Browser  from Kagi uses the same underlying technology as Safari but supports Chrome extensions.

• Allow Chrome extensions:  From your Orion browser, click the three dots in the bottom right corner, and select "Settings" from the menu. Scroll down to the bottom, find the "EXTENSIONS" section, and select "Chrome" to allow installation of Chrome extensions.
• Install: From the Orion browser, go to the Smooth Reader Chrome webstore page and click "Add to Orion".
• Sign in: First, go to your SRWaccount page , click "Get API Key" from the "API Key" section, and follow the instructions to generate and copy the API key. Then, open the Orion browser main menu, and tap the Smooth Reader link from the very top of the main menu. Tap the white profile icon at the top right corner and choose "Sign in via API Key", paste in the API key, and confirm.