diff --git a/mobile_app/babel.config.js b/mobile_app/babel.config.js
new file mode 100644
index 0000000..f3c5f43
--- /dev/null
+++ b/mobile_app/babel.config.js
@@ -0,0 +1,13 @@
+module.exports = function (api) {
+  api.cache(true);
+  return {
+    presets: ['babel-preset-expo'],
+    plugins: [
+      // three.js (pulled in by the mesh-map renderer) uses ES2022 class
+      // static blocks. babel-preset-expo's default target list doesn't
+      // include the transform, so iOS bundling fails with "Static class
+      // blocks are not enabled" before the dev-client can fetch anything.
+      '@babel/plugin-transform-class-static-block',
+    ],
+  };
+};