diff --git a/apps/90sclk/metadata.json b/apps/90sclk/metadata.json
index bfbb6b080..b4b320a1b 100644
--- a/apps/90sclk/metadata.json
+++ b/apps/90sclk/metadata.json
@@ -14,5 +14,6 @@
     {"name":"90sclk.app.js","url":"app.js"},
     {"name":"90sclk.img","url":"app-icon.js","evaluate":true},
     {"name":"90sclk.settings.js","url":"settings.js"}
-  ]
+  ],
+  "data": [{"name":"90sclk.setting.json"}]
 }
diff --git a/apps/activepedom/metadata.json b/apps/activepedom/metadata.json
index 81bafb573..fa1044d85 100644
--- a/apps/activepedom/metadata.json
+++ b/apps/activepedom/metadata.json
@@ -14,5 +14,6 @@
     {"name":"activepedom.settings.js","url":"settings.js"},
     {"name":"activepedom.img","url":"app-icon.js","evaluate":true},
     {"name":"activepedom.app.js","url":"app.js"}
-  ]
+  ],
+  "data":[{"name":"activepedom.settings.json"}]
 }
diff --git a/apps/bthrm/metadata.json b/apps/bthrm/metadata.json
index fea274ff3..6c31759c9 100644
--- a/apps/bthrm/metadata.json
+++ b/apps/bthrm/metadata.json
@@ -18,5 +18,6 @@
     {"name":"bthrm.settings.js","url":"settings.js"},
     {"name":"bthrm","url":"lib.js"},
     {"name":"bthrm.default.json","url":"default.json"}
-  ]
+  ],
+  "data": [{"name":"bthrm.json"}]
 }
diff --git a/apps/bwclk/metadata.json b/apps/bwclk/metadata.json
index fba759bf0..d4091c2fe 100644
--- a/apps/bwclk/metadata.json
+++ b/apps/bwclk/metadata.json
@@ -15,5 +15,6 @@
     {"name":"bwclk.app.js","url":"app.js"},
     {"name":"bwclk.img","url":"app-icon.js","evaluate":true},
     {"name":"bwclk.settings.js","url":"settings.js"}
-  ]
+  ],
+  "data":[{"name":"bwclk.setting.json"}]
 }
diff --git a/apps/bwclklite/metadata.json b/apps/bwclklite/metadata.json
index b073f985e..f8dffdca9 100644
--- a/apps/bwclklite/metadata.json
+++ b/apps/bwclklite/metadata.json
@@ -39,5 +39,10 @@
       "name": "bwclklite.settings.js",
       "url": "settings.js"
     }
+  ],
+  "data": [
+    {
+      "name": "bwclklite.setting.json"
+    }
   ]
 }
diff --git a/apps/cassioWatch/metadata.json b/apps/cassioWatch/metadata.json
index 4b9985c82..fb7dfd401 100644
--- a/apps/cassioWatch/metadata.json
+++ b/apps/cassioWatch/metadata.json
@@ -12,7 +12,10 @@
   "readme": "README.md",
   "storage": [
     { "name": "cassioWatch.app.js", "url": "app.js" },
-    {"name":"cassioWatch.settings.js","url":"settings.js"},
+    { "name": "cassioWatch.settings.js","url": "settings.js" },
     { "name": "cassioWatch.img", "url": "icon.js", "evaluate": true }
+  ],
+  "data": [
+    { "name": "cassioWatch.settings.json" }
   ]
 }
diff --git a/apps/chargerot/metadata.json b/apps/chargerot/metadata.json
index 99c97070e..1b13403d7 100644
--- a/apps/chargerot/metadata.json
+++ b/apps/chargerot/metadata.json
@@ -11,5 +11,6 @@
   "storage": [
     {"name":"chargerot.boot.js","url":"boot.js"},
     {"name":"chargerot.settings.js","url":"settings.js"}
-  ]
+  ],
+  "data":[{"name":"chargerot.settings.json"}]
 }
diff --git a/apps/clkinfostopw/settings.ts b/apps/clkinfostopw/settings.ts
deleted file mode 100644
index a7bfce1e5..000000000
--- a/apps/clkinfostopw/settings.ts
+++ /dev/null
@@ -1,36 +0,0 @@
-const enum StopWatchFormat {
-  HMS,
-  Colon,
-}
-type StopWatchSettings = {
-  format: StopWatchFormat,
-};
-
-(back => {
-  const SETTINGS_FILE = "clkinfostopw.setting.json";
-
-  const storage = require("Storage");
-  const settings: StopWatchSettings = Object.assign(
-    { format: StopWatchFormat.HMS },
-    storage.readJSON(SETTINGS_FILE, true),
-  );
-
-  const save = () => {
-    storage.writeJSON(SETTINGS_FILE, settings)
-  };
-
-  E.showMenu({
-    "": { "title": "stopwatch" },
-    "< Back": back,
-    "Format": {
-      value: settings.format,
-      min: StopWatchFormat.HMS,
-      max: StopWatchFormat.Colon,
-      format: v => v === StopWatchFormat.HMS ? "12m34s" : "12:34",
-      onchange: v => {
-        settings.format = v;
-        save();
-      },
-    },
-  });
-}) satisfies SettingsFunc
diff --git a/apps/contourclock/metadata.json b/apps/contourclock/metadata.json
index d59999c04..ca5ee114f 100644
--- a/apps/contourclock/metadata.json
+++ b/apps/contourclock/metadata.json
@@ -15,5 +15,6 @@
     {"name":"contourclock.settings.js","url":"contourclock.settings.js"},
     {"name":"contourclock","url":"lib.js"},
     {"name":"contourclock.img","url":"app-icon.js","evaluate":true}
-    ]
+  ],
+  "data": [{"name":"contourclock.json"}]
 }
diff --git a/apps/cprassist/metadata.json b/apps/cprassist/metadata.json
index d832e98c5..94ba71d1b 100644
--- a/apps/cprassist/metadata.json
+++ b/apps/cprassist/metadata.json
@@ -13,5 +13,6 @@
     {"name":"cprassist.app.js","url":"cprassist.js"},
     {"name":"cprassist.img","url":"cprassist-icon.js","evaluate":true},
     {"name":"cprassist.settings.js","url":"settings.js"}
-  ]
+  ],
+  "data":[{"name":"cprassist.settings.json"}]
 }
diff --git a/apps/cscsensor/metadata.json b/apps/cscsensor/metadata.json
index 87eb5d12f..d7c3add53 100644
--- a/apps/cscsensor/metadata.json
+++ b/apps/cscsensor/metadata.json
@@ -12,5 +12,8 @@
     {"name":"cscsensor.app.js","url":"cscsensor.app.js"},
     {"name":"cscsensor.settings.js","url":"settings.js"},
     {"name":"cscsensor.img","url":"cscsensor-icon.js","evaluate":true}
+  ],
+  "data": [
+    {"name":"cscsensor.json"}
   ]
 }
diff --git a/apps/cycling/metadata.json b/apps/cycling/metadata.json
index cb4260bb2..caf93eda3 100644
--- a/apps/cycling/metadata.json
+++ b/apps/cycling/metadata.json
@@ -13,5 +13,8 @@
     {"name":"cycling.settings.js","url":"settings.js"},
     {"name":"blecsc","url":"blecsc.js"},
     {"name":"cycling.img","url":"cycling.icon.js","evaluate": true}
+  ],
+  "data": [
+    {"name":"cycling.json"}
   ]
 }
diff --git a/apps/dragboard/metadata.json b/apps/dragboard/metadata.json
index 964ace3a7..58de5153c 100644
--- a/apps/dragboard/metadata.json
+++ b/apps/dragboard/metadata.json
@@ -6,10 +6,13 @@
   "type":"textinput",
   "tags": "keyboard",
   "supports" : ["BANGLEJS2"],
-  "screenshots": [{"url":"screenshot.png"}],  
+  "screenshots": [{"url":"screenshot.png"}],
   "readme": "README.md",
   "storage": [
     {"name":"textinput","url":"lib.js"},
     {"name":"dragboard.settings.js","url":"settings.js"}
+  ],
+  "data": [
+    {"name":"dragboard.json"}
   ]
 }
diff --git a/apps/draguboard/metadata.json b/apps/draguboard/metadata.json
index 926e36807..dc9b06254 100644
--- a/apps/draguboard/metadata.json
+++ b/apps/draguboard/metadata.json
@@ -6,10 +6,13 @@
   "type":"textinput",
   "tags": "keyboard",
   "supports" : ["BANGLEJS2"],
-  "screenshots": [{"url":"screenshot.png"}],  
+  "screenshots": [{"url":"screenshot.png"}],
   "readme": "README.md",
   "storage": [
     {"name":"textinput","url":"lib.js"},
     {"name":"draguboard.settings.js","url":"settings.js"}
+  ],
+  "data": [
+    {"name":"draguboard.json"}
   ]
 }
diff --git a/apps/f9lander/metadata.json b/apps/f9lander/metadata.json
index e53805ee0..5a3887c9e 100644
--- a/apps/f9lander/metadata.json
+++ b/apps/f9lander/metadata.json
@@ -12,5 +12,6 @@
     {"name":"f9lander.app.js","url":"app.js"},
     {"name":"f9lander.img","url":"app-icon.js","evaluate":true},
     {"name":"f9lander.settings.js", "url":"settings.js"}
-  ]
+  ],
+  "data":[{"name":"f9settings.json"}]
 }
diff --git a/apps/game1024/metadata.json b/apps/game1024/metadata.json
index f3b72aad3..45d6e3f61 100644
--- a/apps/game1024/metadata.json
+++ b/apps/game1024/metadata.json
@@ -14,5 +14,6 @@
       {"name":"game1024.app.js","url":"app.js"},
       {"name":"game1024.settings.js","url":"settings.js"},
       {"name":"game1024.img","url":"app-icon.js","evaluate":true}
-    ]
+    ],
+    "data":[{"name":"game1024.settings.json"}]
   }
diff --git a/apps/getup/metadata.json b/apps/getup/metadata.json
index 0c5a7cc5b..00bab40be 100644
--- a/apps/getup/metadata.json
+++ b/apps/getup/metadata.json
@@ -14,5 +14,6 @@
     {"name":"getup.app.js","url":"app.js"},
     {"name":"getup.settings.js","url":"settings.js"},
     {"name":"getup.img","url":"app-icon.js","evaluate":true}
-  ]
+  ],
+  "data":[{"name":"getup.settings.json"}]
 }
diff --git a/apps/happyclk/metadata.json b/apps/happyclk/metadata.json
index e5129b0f0..da7bdcd16 100644
--- a/apps/happyclk/metadata.json
+++ b/apps/happyclk/metadata.json
@@ -20,5 +20,6 @@
     {"name":"happyclk.app.js","url":"happyclk.app.js"},
     {"name":"happyclk.img","url":"happyclk.icon.js","evaluate":true},
     {"name":"happyclk.settings.js","url":"happyclk.settings.js"}
-  ]
+  ],
+  "data":[{"name":"happyclk.setting.json"}]
 }
diff --git a/apps/hralarm/metadata.json b/apps/hralarm/metadata.json
index 4c661b3fc..c99cb857f 100644
--- a/apps/hralarm/metadata.json
+++ b/apps/hralarm/metadata.json
@@ -4,7 +4,7 @@
   "shortName":"HR Alarm",
   "version":"0.02",
   "description": "This invisible widget vibrates whenever the heart rate gets close to the upper limit or goes over or under the configured limits",
-  "icon": "widget.png",  
+  "icon": "widget.png",
   "type": "widget",
   "tags": "widget",
   "supports" : ["BANGLEJS2"],
@@ -12,5 +12,8 @@
   "storage": [
     {"name":"hralarm.wid.js","url":"widget.js"},
     {"name":"hralarm.settings.js","url":"settings.js"}
+  ],
+  "data": [
+    {"name":"hralarm.json"}
   ]
 }
diff --git a/apps/imageclock/metadata.json b/apps/imageclock/metadata.json
index b291ab01e..f8a0aa61e 100644
--- a/apps/imageclock/metadata.json
+++ b/apps/imageclock/metadata.json
@@ -15,5 +15,8 @@
     {"name":"imageclock.app.js","url":"app.js"},
     {"name":"imageclock.settings.js","url":"settings.js"},
     {"name":"imageclock.img","url":"app-icon.js","evaluate":true}
+  ],
+  "data": [
+    {"name":"imageclock.json"}
   ]
 }
diff --git a/apps/kbtouch/metadata.json b/apps/kbtouch/metadata.json
index 8d7434e44..31dc8c9a8 100644
--- a/apps/kbtouch/metadata.json
+++ b/apps/kbtouch/metadata.json
@@ -12,5 +12,6 @@
     {"name":"textinput","url":"lib.js"},
     {"name":"kbtouch.settings.js","url":"settings.js"}
   ],
-  "sortorder":-1
+  "sortorder":-1,
+  "data":[{"name":"kbtouch.settings.json"}]
 }
diff --git a/apps/lcars/metadata.json b/apps/lcars/metadata.json
index 65c59081f..2cefb544f 100644
--- a/apps/lcars/metadata.json
+++ b/apps/lcars/metadata.json
@@ -16,5 +16,6 @@
     {"name":"lcars.app.js","url":"lcars.app.js"},
     {"name":"lcars.img","url":"lcars.icon.js","evaluate":true},
     {"name":"lcars.settings.js","url":"lcars.settings.js"}
-  ]
+  ],
+  "data":[{"name":"lcars.setting.json"}]
 }
diff --git a/apps/limelight/metadata.json b/apps/limelight/metadata.json
index 0e5dfd565..5c6bcfd76 100644
--- a/apps/limelight/metadata.json
+++ b/apps/limelight/metadata.json
@@ -13,5 +13,8 @@
     {"name":"limelight.app.js","url":"limelight.app.js"},
     {"name":"limelight.settings.js","url":"limelight.settings.js"},
     {"name":"limelight.img","url":"limelight.icon.js","evaluate":true}
+  ],
+  "data": [
+    {"name":"limelight.json"}
   ]
 }
diff --git a/apps/linuxclock/metadata.json b/apps/linuxclock/metadata.json
index 2bfe1d51f..ccd9db5e7 100644
--- a/apps/linuxclock/metadata.json
+++ b/apps/linuxclock/metadata.json
@@ -14,5 +14,6 @@
     {"name":"linuxclock.app.js","url":"app.js"},
     {"name":"linuxclock.img","url":"app-icon.js","evaluate":true},
     {"name":"linuxclock.settings.js","url":"settings.js"}
-  ]
+  ],
+  "data":[{"name":"linuxclock.setting.json"}]
 }
diff --git a/apps/loadingscreen/metadata.json b/apps/loadingscreen/metadata.json
index 199f4a2b4..1815e4ce8 100644
--- a/apps/loadingscreen/metadata.json
+++ b/apps/loadingscreen/metadata.json
@@ -10,5 +10,6 @@
   "readme": "README.md",
   "storage": [
     {"name":"loadingscreen.settings.js","url":"settings.js"}
-  ]
+  ],
+  "data":[{"name":".loading"}]
 }
diff --git a/apps/metronome/metadata.json b/apps/metronome/metadata.json
index 7f8582ca5..8ada5d98c 100644
--- a/apps/metronome/metadata.json
+++ b/apps/metronome/metadata.json
@@ -13,5 +13,6 @@
     {"name":"metronome.app.js","url":"metronome.js"},
     {"name":"metronome.img","url":"metronome-icon.js","evaluate":true},
     {"name":"metronome.settings.js","url":"settings.js"}
-  ]
+  ],
+  "data":[{"name":"metronome.settings.json"}]
 }
diff --git a/apps/mysticclock/metadata.json b/apps/mysticclock/metadata.json
index bd2df2f8d..51f44b79b 100644
--- a/apps/mysticclock/metadata.json
+++ b/apps/mysticclock/metadata.json
@@ -14,5 +14,8 @@
     {"name":"mysticclock.app.js","url":"mystic-clock-app.js"},
     {"name":"mysticclock.settings.js","url":"mystic-clock-settings.js"},
     {"name":"mysticclock.img","url":"mystic-clock-icon.js","evaluate":true}
+  ],
+  "data": [
+    {"name":"mysticclock.settings.json"}
   ]
 }
diff --git a/apps/mysticdock/metadata.json b/apps/mysticdock/metadata.json
index 2775b0b72..0ebff3b9b 100644
--- a/apps/mysticdock/metadata.json
+++ b/apps/mysticdock/metadata.json
@@ -13,5 +13,8 @@
     {"name":"mysticdock.boot.js","url":"mystic-dock-boot.js"},
     {"name":"mysticdock.settings.js","url":"mystic-dock-settings.js"},
     {"name":"mysticdock.img","url":"mystic-dock-icon.js","evaluate":true}
+  ],
+  "data": [
+    {"name":"mysticdock.settings.json"}
   ]
 }
diff --git a/apps/openwind/metadata.json b/apps/openwind/metadata.json
index 01d7ca124..5e0a60972 100644
--- a/apps/openwind/metadata.json
+++ b/apps/openwind/metadata.json
@@ -6,10 +6,11 @@
   "icon": "openwind.png",
   "readme": "README.md",
   "tags": "ble,outdoors,gps,sailing",
-  "supports" : ["BANGLEJS", "BANGLEJS2"],  
+  "supports" : ["BANGLEJS", "BANGLEJS2"],
   "storage": [
     {"name":"openwind.app.js","url":"app.js"},
     {"name":"openwind.img","url":"app-icon.js","evaluate":true},
     {"name":"openwind.settings.js", "url":"settings.js"}
-  ]
+  ],
+  "data":[{"name":"openwindsettings.json"}]
 }
diff --git a/apps/pebble/metadata.json b/apps/pebble/metadata.json
index 0ccb8e2af..49dbcd820 100644
--- a/apps/pebble/metadata.json
+++ b/apps/pebble/metadata.json
@@ -15,5 +15,8 @@
     {"name":"pebble.app.js","url":"pebble.app.js"},
     {"name":"pebble.settings.js","url":"pebble.settings.js"},
     {"name":"pebble.img","url":"pebble.icon.js","evaluate":true}
+  ],
+  "data": [
+    {"name":"pebble.settings.json"}
   ]
 }
diff --git a/apps/pebbled/metadata.json b/apps/pebbled/metadata.json
index 62fabc3e7..8924e600a 100644
--- a/apps/pebbled/metadata.json
+++ b/apps/pebbled/metadata.json
@@ -14,5 +14,6 @@
     {"name":"pebbled.app.js","url":"pebbled.app.js"},
     {"name":"pebbled.settings.js","url":"pebbled.settings.js"},
     {"name":"pebbled.img","url":"pebbled.icon.js","evaluate":true}
-  ]
+  ],
+  "data":[{"name":"pebbleDistance.json"}]
 }
diff --git a/apps/pebblepp/metadata.json b/apps/pebblepp/metadata.json
index 6821fdc50..88c1d8fd5 100644
--- a/apps/pebblepp/metadata.json
+++ b/apps/pebblepp/metadata.json
@@ -15,5 +15,8 @@
     {"name":"pebblepp.app.js","url":"app.js"},
     {"name":"pebblepp.settings.js","url":"settings.js"},
     {"name":"pebblepp.img","url":"icon.js","evaluate":true}
+  ],
+  "data": [
+    {"name":"pebblepp.settings.json"}
   ]
 }
diff --git a/apps/pomoplus/metadata.json b/apps/pomoplus/metadata.json
index 84a82c0e1..0db15ab4d 100644
--- a/apps/pomoplus/metadata.json
+++ b/apps/pomoplus/metadata.json
@@ -32,5 +32,8 @@
       "name": "pomoplus.settings.js",
       "url": "settings.js"
     }
+  ],
+  "data": [
+    {"name":"pomoplus.settings.json"}
   ]
 }
diff --git a/apps/rebble/metadata.json b/apps/rebble/metadata.json
index c380204a4..6242236c8 100644
--- a/apps/rebble/metadata.json
+++ b/apps/rebble/metadata.json
@@ -15,5 +15,8 @@
     {"name":"rebble.app.js","url":"rebble.app.js"},
     {"name":"rebble.settings.js","url":"rebble.settings.js"},
     {"name":"rebble.img","url":"rebble.icon.js","evaluate":true}
+  ],
+  "data": [
+    {"name":"rebble.settings.json"}
   ]
 }
diff --git a/apps/sensortools/metadata.json b/apps/sensortools/metadata.json
index 48b146617..bffffd090 100644
--- a/apps/sensortools/metadata.json
+++ b/apps/sensortools/metadata.json
@@ -14,5 +14,8 @@
     {"name":"sensortools.settings.js","url":"settings.js"},
     {"name":"sensortools","url":"lib.js"},
     {"name":"sensortools.default.json","url":"default.json"}
+  ],
+  "data": [
+    {"name":"sensortools.settings.json"}
   ]
 }
diff --git a/apps/sleeplogalarm/metadata.json b/apps/sleeplogalarm/metadata.json
index 30d3dcda7..fd68ce376 100644
--- a/apps/sleeplogalarm/metadata.json
+++ b/apps/sleeplogalarm/metadata.json
@@ -17,5 +17,6 @@
     {"name": "sleeplogalarm", "url": "lib.js"},
     {"name": "sleeplogalarm.settings.js", "url": "settings.js"},
     {"name": "sleeplogalarm.wid.js", "url": "widget.js"}
-  ]
+  ],
+  "data":[{"name":"sleeplogalarm.settings.json"}]
 }
diff --git a/apps/speedalt/metadata.json b/apps/speedalt/metadata.json
index 89bfd4a57..1ecb2b562 100644
--- a/apps/speedalt/metadata.json
+++ b/apps/speedalt/metadata.json
@@ -15,5 +15,8 @@
     {"name":"speedalt.app.js","url":"app.js"},
     {"name":"speedalt.img","url":"app-icon.js","evaluate":true},
     {"name":"speedalt.settings.js","url":"settings.js"}
+  ],
+  "data": [
+    {"name":"speedalt.settings.json"}
   ]
 }
diff --git a/apps/timecal/metadata.json b/apps/timecal/metadata.json
index 287dce0ae..9175d92a3 100644
--- a/apps/timecal/metadata.json
+++ b/apps/timecal/metadata.json
@@ -12,5 +12,6 @@
   "storage": [
     {"name":"timecal.app.js","url":"timecal.app.js"},
     {"name":"timecal.settings.js","url":"timecal.settings.js"}
-  ]
+  ],
+  "data":[{"name":"timecal.settings.json"}]
 }
diff --git a/apps/torch/metadata.json b/apps/torch/metadata.json
index 6837dc904..414222587 100644
--- a/apps/torch/metadata.json
+++ b/apps/torch/metadata.json
@@ -13,5 +13,8 @@
     {"name":"torch.wid.js","url":"widget.js","supports": ["BANGLEJS"]},
     {"name":"torch.img","url":"app-icon.js","evaluate":true},
     {"name":"torch.settings.js","url":"settings.js"}
+  ],
+  "data": [
+    {"name":"torch.settings.json"}
   ]
 }
diff --git a/apps/widpedom/metadata.json b/apps/widpedom/metadata.json
index f49d3ba5b..480519a29 100644
--- a/apps/widpedom/metadata.json
+++ b/apps/widpedom/metadata.json
@@ -10,5 +10,6 @@
   "storage": [
     {"name":"widpedom.wid.js","url":"widget.js"},
     {"name":"widpedom.settings.js","url":"settings.js"}
-  ]
+  ],
+  "data":[{"name":"wpedom.json"}]
 }
diff --git a/apps/wohrm/metadata.json b/apps/wohrm/metadata.json
index 1e2ac2cb0..a5411c113 100644
--- a/apps/wohrm/metadata.json
+++ b/apps/wohrm/metadata.json
@@ -14,5 +14,6 @@
     {"name":"wohrm.app.js","url":"app.js"},
     {"name":"wohrm.settings.js","url":"settings.js"},
     {"name":"wohrm.img","url":"app-icon.js","evaluate":true}
-  ]
+  ],
+  "data":[{"name":"wohrm.setting.json"}]
 }
diff --git a/bin/sanitycheck.js b/bin/sanitycheck.js
index ecba1876e..d5c755443 100755
--- a/bin/sanitycheck.js
+++ b/bin/sanitycheck.js
@@ -92,9 +92,12 @@ const INTERNAL_FILES_IN_APP_TYPE = { // list of app types and files they SHOULD
 };
 /* These are warnings we know about but don't want in our output */
 var KNOWN_WARNINGS = [
-"App gpsrec data file wildcard .gpsrc? does not include app ID",
-"App owmweather data file weather.json is also listed as data file for app weather",
+  "App gpsrec data file wildcard .gpsrc? does not include app ID",
+  "App owmweather data file weather.json is also listed as data file for app weather",
   "App messagegui storage file messagegui is also listed as storage file for app messagelist",
+  "App carcrazy has a setting file but no corresponding data entry (add `\"data\":[{\"name\":\"carcrazy.settings.json\"}]`)",
+  "App loadingscreen has a setting file but no corresponding data entry (add `\"data\":[{\"name\":\"loadingscreen.settings.json\"}]`)",
+  "App trex has a setting file but no corresponding data entry (add `\"data\":[{\"name\":\"trex.settings.json\"}]`)",
 ];
 
 function globToRegex(pattern) {
@@ -116,7 +119,7 @@ apps.forEach((app,appIdx) => {
   if (!app.id) ERROR(`App ${appIdx} has no id`);
   var appDirRelative = APPSDIR_RELATIVE+app.id+"/";
   var appDir = APPSDIR+app.id+"/";
-  var metadataFile = appDirRelative+"metadata.json";  
+  var metadataFile = appDirRelative+"metadata.json";
   if (existingApps.includes(app.id)) ERROR(`Duplicate app '${app.id}'`, {file:metadataFile});
   existingApps.push(app.id);
   //console.log(`Checking ${app.id}...`);
@@ -164,11 +167,11 @@ apps.forEach((app,appIdx) => {
     });
   }
   if (app.readme) {
-    if (!fs.existsSync(appDir+app.readme)) 
+    if (!fs.existsSync(appDir+app.readme))
       ERROR(`App ${app.id} README file doesn't exist`, {file:metadataFile});
   } else {
     let readme = fs.readdirSync(appDir).find(f => f.toLowerCase().includes("readme"));
-    if (readme) 
+    if (readme)
       ERROR(`App ${app.id} has a README in the directory (${readme}) but it's not linked`, {file:metadataFile});
   }
   if (app.custom && !fs.existsSync(appDir+app.custom)) ERROR(`App ${app.id} custom HTML doesn't exist`, {file:metadataFile});
@@ -253,6 +256,10 @@ apps.forEach((app,appIdx) => {
         if (a>=0 && b>=0 && a<b)
           WARN(`Clock ${app.id} file calls loadWidgets before setUI (clock widget/etc won't be aware a clock app is running)`, {file:appDirRelative+file.url, line : fileContents.substr(0,a).split("\n").length});
       }
+      // if settings, suggest adding to datafiles
+      if (/\.settings?\.js$/.test(file.name) && (!app.data || app.data.every(d => !d.name || !d.name.endsWith(".json")))) {
+        WARN(`App ${app.id} has a setting file but no corresponding data entry (add \`"data":[{"name":"${app.id}.settings.json"}]\`)`, {file:appDirRelative+file.url});
+      }
     }
     for (const key in file) {
       if (!STORAGE_KEYS.includes(key)) ERROR(`App ${app.id} file ${file.name} has unknown key ${key}`, {file:appDirRelative+file.url});