diff --git a/packages/client/rollup.config.js b/packages/client/rollup.config.js
index 30064bde26..6a4144caf5 100644
--- a/packages/client/rollup.config.js
+++ b/packages/client/rollup.config.js
@@ -10,7 +10,7 @@ export default {
   output: [
     {
       sourcemap: true,
-      format: "esm",
+      format: "iife",
       file: `./dist/budibase-client.js`,
     },
   ],
diff --git a/packages/client/src/utils/getAppId.js b/packages/client/src/utils/getAppId.js
deleted file mode 100644
index 355dd55d6b..0000000000
--- a/packages/client/src/utils/getAppId.js
+++ /dev/null
@@ -1,47 +0,0 @@
-const COOKIE_SEPARATOR = ";"
-const APP_PREFIX = "app_"
-const KEY_VALUE_SPLIT = "="
-
-function confirmAppId(possibleAppId) {
-  return possibleAppId && possibleAppId.startsWith(APP_PREFIX)
-    ? possibleAppId
-    : undefined
-}
-
-function tryGetFromCookie({ cookies }) {
-  if (!cookies) {
-    return undefined
-  }
-  const cookie = cookies
-    .split(COOKIE_SEPARATOR)
-    .find(cookie => cookie.trim().startsWith("budibase:currentapp"))
-  let appId
-  if (cookie && cookie.split(KEY_VALUE_SPLIT).length === 2) {
-    appId = cookie.split("=")[1]
-  }
-  return confirmAppId(appId)
-}
-
-function tryGetFromPath() {
-  const appId = location.pathname.split("/")[1]
-  return confirmAppId(appId)
-}
-
-function tryGetFromSubdomain() {
-  const parts = window.location.host.split(".")
-  const appId = parts[1] ? parts[0] : undefined
-  return confirmAppId(appId)
-}
-
-export const getAppId = (cookies = window.document.cookie) => {
-  const functions = [tryGetFromSubdomain, tryGetFromPath, tryGetFromCookie]
-  // try getting the app Id in order
-  let appId
-  for (let func of functions) {
-    appId = func({ cookies })
-    if (appId) {
-      break
-    }
-  }
-  return appId
-}