diff --git a/demo/viewer/viewer.html b/demo/viewer/viewer.html
index 41fac8bf..0c096a9a 100644
--- a/demo/viewer/viewer.html
+++ b/demo/viewer/viewer.html
@@ -53,9 +53,9 @@
       <script main="@empty"
               env="production"
               config="../package.json!npm"
-              src="../dist/bundles/app.js?v=1697489907734"
+              src="../dist/bundles/app.js?v=1724972361669"
               cache-key="v"
-              cache-version="1697489907734"
+              cache-version="1724972361669"
               base-url="../">
       </script>
     </body>
diff --git a/index.dev.html b/index.dev.html
index 6b57e8eb..d44500ab 100644
--- a/index.dev.html
+++ b/index.dev.html
@@ -59,6 +59,6 @@
           errRepURL: ''
         }));
       </script>
-      <script src="node_modules/steal/steal.production.js?v=1677170402416" cache-key="v" cache-version="1677170402416" main="@caliorg/a2jviewer/app"></script>
+      <script src="node_modules/steal/steal.production.js?v=1724971878013" cache-key="v" cache-version="1724971878013" main="@caliorg/a2jviewer/app"></script>
     </body>
   </html>
\ No newline at end of file
diff --git a/index.html b/index.html
index f93d3ae3..0a9ebbef 100644
--- a/index.html
+++ b/index.html
@@ -59,6 +59,6 @@
           errRepURL: ''
         }));
       </script>
-      <script src="node_modules/steal/steal.production.js?v=1697489872534" cache-key="v" cache-version="1697489872534" main="@caliorg/a2jviewer/app"></script>
+      <script src="node_modules/steal/steal.production.js?v=1724972332735" cache-key="v" cache-version="1724972332735" main="@caliorg/a2jviewer/app"></script>
     </body>
   </html>
\ No newline at end of file
diff --git a/package-lock.json b/package-lock.json
index bd236c94..363ce5fd 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@caliorg/a2jviewer",
-  "version": "8.1.6",
+  "version": "8.1.7-0",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "@caliorg/a2jviewer",
-      "version": "8.1.6",
+      "version": "8.1.7-0",
       "license": "GNU AGPL v3.0",
       "dependencies": {
         "@caliorg/a2jdeps": "^7.1.7",
diff --git a/package.json b/package.json
index 54c87260..c3716c70 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@caliorg/a2jviewer",
-  "version": "8.1.6",
+  "version": "8.1.7-0",
   "description": "A2J Viewer standalone and preview app.",
   "main": "a2jviewer/app",
   "scripts": {
diff --git a/src/mobile/pages/pages-vm.js b/src/mobile/pages/pages-vm.js
index ca96197a..88bc36e8 100644
--- a/src/mobile/pages/pages-vm.js
+++ b/src/mobile/pages/pages-vm.js
@@ -202,6 +202,86 @@ export default DefineMap.extend('PagesVM', {
     }
   },
 
+  /**
+   * @property {String} pages.ViewModel.prototype.validateAnswers answersString
+   * @parent pages.ViewModel
+   *
+   * XML version of the `answers` entered by the user.
+   *
+   * This is POSTed to `setDataURL` when user finishes the interview,
+   * and populated when a user loads saved answers.
+   */
+  validatedAnswers (answers) {
+
+
+    /**
+   * @property {bool} pages.ViewModel.prototype.validateAnswers.isValidDate answersString
+   * @parent pages.ViewModel.validatedAnswers
+   *
+   * check is date is valid
+   */
+    function isValidDate(date){
+
+
+      let dmy = date.split('/')
+      // js wants mdy or ymd 
+      // while a2j dates are d/m/yyyy
+      // if date has bad format bail
+      if (dmy.length !== 3){
+        return false
+      }
+
+      // slash delimited is not guaranteed supported everywhere
+      // so convert to 
+      let dateval = new Date(
+        dmy[2] + '-' +
+        dmy[1] + '-' +
+        dmy[0]
+      )
+      return (date.toString() !== "Invalid Date")
+    }
+
+    /*
+      inspired by but does not use
+      https://stackoverflow.com/questions/20169217/how-to-write-isnumber-in-javascript
+    */
+    function isValidNumber(num){
+      return !isNaN(Number(num)) && isFinite(Number(num))
+    }
+
+    function sanitizeAnswerValues (answer) {
+
+      let validator = []
+
+      validator["Date"] = isValidDate
+      validator["Number"] = isValidNumber
+
+
+      for(i=1; i > answer.values.length; i++){
+        if (!validator[answer.type](answer.values[i])){
+          delete answer.values[i]
+        }
+      } 
+
+      answer.values[0] = answer.values.length
+
+      return answer
+    }
+
+    //answers = Object.values(answers).filter(isValidAnswer)
+    
+    Object.keys(answers).forEach(function filter(name){
+      sanitizedAnswer = sanitizeAnswerValues(answers[name])
+      if (sanitizedAnswer.values.length === 1){
+        delete answers[name]
+      } else {
+        answers[name] = sanitizedAnswer
+      }
+    })
+    
+    return answers
+  },
+
   /**
    * @property {String} pages.ViewModel.prototype.answersString answersString
    * @parent pages.ViewModel
@@ -213,6 +293,9 @@ export default DefineMap.extend('PagesVM', {
    */
   answersANX: {
     get () {
+      console.log(this.answers.serialize())
+      console.log(this.validatedAnswers(this.answers.serialize()))
+      //const parsed = Parser.parseANX(this.answers.serialize())
       const parsed = Parser.parseANX(this.answers.serialize())
       return parsed
     }