diff --git a/Buildscripts/TactilitySDK/Tools/app.py b/Buildscripts/TactilitySDK/Tools/app.py
index 8be87e5c3..6994433b8 100755
--- a/Buildscripts/TactilitySDK/Tools/app.py
+++ b/Buildscripts/TactilitySDK/Tools/app.py
@@ -36,7 +36,7 @@ def print_help():
     print("")
     print("  build                          Build the app. Optionally specify a platform.")
     print("    Supported platforms are lower case. Example: esp32s3")
-    print("    Supported platforms are read from manifest.properties")
+    print("    Supported platforms are read from manifest.properties (target.platforms=all for every installed SDK platform)")
     print("    Parameters:")
     print("      (optional) --architecture [input], -a [input]")
     print("")
@@ -348,9 +348,19 @@ def get_binary_dirs(manifest):
     else:
         return [(manifest["app.id"], ".")]
 
+# "target.platforms=all" means every platform that an SDK is installed for
+def get_manifest_platforms(manifest):
+    platforms = [platform.strip() for platform in manifest["target.platforms"].split(",")]
+    if platforms != ["all"]:
+        return platforms
+    version_directory = os.path.join(sdk_root_path, "sdk", manifest["target.sdk"])
+    prefix = "platform-"
+    if not os.path.isdir(version_directory):
+        exit_with_error(f"No SDK {manifest['target.sdk']} installed, so 'all' platforms can't be determined")
+    return sorted(name[len(prefix):] for name in os.listdir(version_directory) if name.startswith(prefix))
+
 def is_valid_manifest_platform(manifest, platform):
-    manifest_platforms = manifest["target.platforms"].split(",")
-    return platform in manifest_platforms
+    return platform in get_manifest_platforms(manifest)
 
 def validate_manifest_platform(manifest, platform):
     if not is_valid_manifest_platform(manifest, platform):
@@ -358,7 +368,7 @@ def validate_manifest_platform(manifest, platform):
 
 def get_manifest_target_platforms(manifest, requested_platform):
     if requested_platform == "" or requested_platform is None:
-        return manifest["target.platforms"].split(",")
+        return get_manifest_platforms(manifest)
     else:
         validate_manifest_platform(manifest, requested_platform)
         return [requested_platform]
diff --git a/Documentation/ideas.md b/Documentation/ideas.md
index 3ffcdfb34..ee5280a25 100644
--- a/Documentation/ideas.md
+++ b/Documentation/ideas.md
@@ -13,7 +13,6 @@
 - Fix BT: an esp32 device connecting to a peripheral isn't working
 - "update all" functionality for app hub module, including commandline app. add button to app hub toolbar if there are 1 or more apps to update (does "update all").
 - Improve Wi-Fi mock so it actually works with connect/disconnect/scan list. It connects to literally anything from the scan list.
-- Fix posix Wi-Fi so it actually connects to something
 - Support http/https on posix
 - Use GPS time to set/update the current time: when enabled, at boot, when wifi is not enabled, start the gps device and wait until a lock is acquired, then get the time and sync it. Then stop the GPS device.
 - lvgl-module's spinner relies on hard-coded spinner asset from Tactility main project, should be sized based on DPI