First, Add Google Tag Manager to your website by following the steps below:
Copy the following code:
<style>.download-app-wrapper{position:fixed;left:0%;top:auto;right:0%;bottom:0%;z-index:9999999;height:80px;padding-top:14px;background-color:#fff;box-shadow:0 -3px 10px 0 rgba(0,0,0,0.2)}.cont{margin-left:auto;margin-right:auto;max-width:940px;display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;-webkit-box-orient:horizontal;-webkit-box-direction:normal;-webkit-flex-direction:row;-ms-flex-direction:row;flex-direction:row;-webkit-box-pack:justify;-webkit-justify-content:space-between;-ms-flex-pack:justify;justify-content:space-between;-webkit-box-align:center;-webkit-align-items:center;-ms-flex-align:center;align-items:center}.appstore-btn{margin-left:14px}.text-block{-webkit-box-flex:1;-webkit-flex:1;-ms-flex:1;flex:1}.heading-2{margin-top:auto;margin-bottom:auto;font-size:26px}.paragraph{margin-bottom:auto;color:#8d8d8d}@media screen and (max-width: 767px){.download-app-wrapper{height:100px;padding-top:6px}.cont{-webkit-box-orient:vertical;-webkit-box-direction:normal;-webkit-flex-direction:column;-ms-flex-direction:column;flex-direction:column}.appstore-btn{margin-left:7px;padding-right:7px}.heading-2{font-size:20px;text-align:center}.paragraph{display:none;margin-bottom:8px;font-size:12px;text-align:center}}@media screen and (max-width: 479px){.cont{text-align:center}}</style><div class="download-app-wrapper"><div class="cont"><div class="text-block"><h2 class="heading-2">Disply Text</h2><p class="paragraph">Available on Apple App Store & Google Play Store</p></div><div class="appstore-btns-block"> <a href="Google Play App Link" target="_blank" class="w-inline-block"><img src="https://wuilt.com/blog/wp-content/uploads/2020/11/Google-Play-Button.svg" height="40" alt="" class="appstore-btn"></a> <a href="AppStore Link Here" target="_blank" class="w-inline-block"><img src="https://wuilt.com/blog/wp-content/uploads/2020/11/Apple-app-store-Button.svg" height="40" alt="" class="appstore-btn"></a></div></div></div>
Visit tagmanager.google.com and click on New Tag

Click on Tag Configuration

Click on Custom HTML

Paste your code and change "Display text" to the name of your app, "Google play app link" to the app link on Google play, and "App store link here" to the app link on App store

Click on Triggering
Select All Pages and click Add

Rename the Tag Name and click Save
Click on Submit, Publish then Continue



Login to your Wuilt account and publish your website

Open your website, and you will find your app link as a widget