diff --git a/assets/translations/de.json b/assets/translations/de.json
index 7499014..f68da68 100644
--- a/assets/translations/de.json
+++ b/assets/translations/de.json
@@ -233,6 +233,7 @@
     "about": "Über",
     "requiresCredentialsInSettings": "Benötigt zusätzliche Anmeldedaten (in den Einstellungen)",
     "checkOnStart": "Überprüfe einmalig beim Start",
+    "tryInferAppIdFromCode": "Try inferring App ID from source code",
     "removeAppQuestion": {
         "one": "App entfernen?",
         "other": "Apps entfernen?"
diff --git a/assets/translations/en.json b/assets/translations/en.json
index 1f543ac..e9b4503 100644
--- a/assets/translations/en.json
+++ b/assets/translations/en.json
@@ -233,6 +233,7 @@
     "about": "About",
     "requiresCredentialsInSettings": "This needs additional credentials (in Settings)",
     "checkOnStart": "Check Once on Start",
+    "tryInferAppIdFromCode": "Try inferring App ID from source code",
     "removeAppQuestion": {
         "one": "Remove App?",
         "other": "Remove Apps?"
diff --git a/assets/translations/es.json b/assets/translations/es.json
index d3b6500..6c7cc05 100644
--- a/assets/translations/es.json
+++ b/assets/translations/es.json
@@ -233,6 +233,7 @@
     "about": "About",
     "requiresCredentialsInSettings": "This needs additional credentials (in Settings)",
     "checkOnStart": "Check Once on Start",
+    "tryInferAppIdFromCode": "Try inferring App ID from source code",
     "removeAppQuestion": {
         "one": "¿Eliminar Aplicación?",
         "other": "¿Eliminar Aplicaciones?"
diff --git a/assets/translations/fa.json b/assets/translations/fa.json
index d7eb778..0b4030a 100644
--- a/assets/translations/fa.json
+++ b/assets/translations/fa.json
@@ -233,6 +233,7 @@
     "about": "About",
     "requiresCredentialsInSettings": "This needs additional credentials (in Settings)",
     "checkOnStart": "Check Once on Start",
+    "tryInferAppIdFromCode": "Try inferring App ID from source code",
     "removeAppQuestion": {
         "one": "برنامه حذف شود؟",
         "other": "برنامه ها حذف شوند؟"
diff --git a/assets/translations/fr.json b/assets/translations/fr.json
index dfc8876..ea60088 100644
--- a/assets/translations/fr.json
+++ b/assets/translations/fr.json
@@ -233,6 +233,7 @@
     "about": "About",
     "requiresCredentialsInSettings": "This needs additional credentials (in Settings)",
     "checkOnStart": "Check Once on Start",
+    "tryInferAppIdFromCode": "Try inferring App ID from source code",
     "removeAppQuestion": {
         "one": "Supprimer l'application ?",
         "other": "Supprimer les applications ?"
diff --git a/assets/translations/hu.json b/assets/translations/hu.json
index 6d311b6..c3771af 100644
--- a/assets/translations/hu.json
+++ b/assets/translations/hu.json
@@ -232,6 +232,7 @@
     "about": "Rólunk",
     "requiresCredentialsInSettings": "Ehhez további hitelesítő adatokra van szükség (a Beállításokban)",
     "checkOnStart": "Egyszer az indításkor",
+    "tryInferAppIdFromCode": "Try inferring App ID from source code",
     "removeAppQuestion": {
         "one": "Eltávolítja az alkalmazást?",
         "other": "Eltávolítja az alkalmazást?"
diff --git a/assets/translations/it.json b/assets/translations/it.json
index 53b20c6..93c56e1 100644
--- a/assets/translations/it.json
+++ b/assets/translations/it.json
@@ -233,6 +233,7 @@
     "about": "About",
     "requiresCredentialsInSettings": "This needs additional credentials (in Settings)",
     "checkOnStart": "Check Once on Start",
+    "tryInferAppIdFromCode": "Try inferring App ID from source code",
     "removeAppQuestion": {
         "one": "Rimuovere l'App?",
         "other": "Rimuovere le App?"
diff --git a/assets/translations/ja.json b/assets/translations/ja.json
index 135a8ab..c0d9c22 100644
--- a/assets/translations/ja.json
+++ b/assets/translations/ja.json
@@ -233,6 +233,7 @@
     "about": "概要",
     "requiresCredentialsInSettings": "これには追加の認証が必要です (設定にて)",
     "checkOnStart": "Check Once on Start",
+    "tryInferAppIdFromCode": "Try inferring App ID from source code",
     "removeAppQuestion": {
         "one": "アプリを削除しますか？",
         "other": "アプリを削除しますか？"
diff --git a/assets/translations/zh.json b/assets/translations/zh.json
index 83c08b2..0b3837c 100644
--- a/assets/translations/zh.json
+++ b/assets/translations/zh.json
@@ -233,6 +233,7 @@
     "about": "相关文档",
     "requiresCredentialsInSettings": "此功能需要额外的凭据（在“设置”中添加）",
     "checkOnStart": "启动时进行一次检查",
+    "tryInferAppIdFromCode": "Try inferring App ID from source code",
     "removeAppQuestion": {
         "one": "是否删除应用？",
         "other": "是否删除应用？"
diff --git a/lib/app_sources/apkcombo.dart b/lib/app_sources/apkcombo.dart
index 16e21c5..c90b0cb 100644
--- a/lib/app_sources/apkcombo.dart
+++ b/lib/app_sources/apkcombo.dart
@@ -19,8 +19,8 @@ class APKCombo extends AppSource {
   }
 
   @override
-  String? tryInferringAppId(String standardUrl,
-      {Map<String, dynamic> additionalSettings = const {}}) {
+  Future<String?> tryInferringAppId(String standardUrl,
+      {Map<String, dynamic> additionalSettings = const {}}) async {
     return Uri.parse(standardUrl).pathSegments.last;
   }
 
@@ -83,7 +83,7 @@ class APKCombo extends AppSource {
     String standardUrl,
     Map<String, dynamic> additionalSettings,
   ) async {
-    String appId = tryInferringAppId(standardUrl)!;
+    String appId = (await tryInferringAppId(standardUrl))!;
     var preres = await sourceRequest(standardUrl);
     if (preres.statusCode != 200) {
       throw getObtainiumHttpError(preres);
diff --git a/lib/app_sources/apkpure.dart b/lib/app_sources/apkpure.dart
index 20028a4..f3cef4e 100644
--- a/lib/app_sources/apkpure.dart
+++ b/lib/app_sources/apkpure.dart
@@ -24,8 +24,8 @@ class APKPure extends AppSource {
   }
 
   @override
-  String? tryInferringAppId(String standardUrl,
-      {Map<String, dynamic> additionalSettings = const {}}) {
+  Future<String?> tryInferringAppId(String standardUrl,
+      {Map<String, dynamic> additionalSettings = const {}}) async {
     return Uri.parse(standardUrl).pathSegments.last;
   }
 
@@ -34,7 +34,7 @@ class APKPure extends AppSource {
     String standardUrl,
     Map<String, dynamic> additionalSettings,
   ) async {
-    String appId = tryInferringAppId(standardUrl)!;
+    String appId = (await tryInferringAppId(standardUrl))!;
     String host = Uri.parse(standardUrl).host;
     var res = await sourceRequest('$standardUrl/download');
     if (res.statusCode == 200) {
diff --git a/lib/app_sources/fdroid.dart b/lib/app_sources/fdroid.dart
index 28d45cc..0602f6d 100644
--- a/lib/app_sources/fdroid.dart
+++ b/lib/app_sources/fdroid.dart
@@ -31,8 +31,8 @@ class FDroid extends AppSource {
   }
 
   @override
-  String? tryInferringAppId(String standardUrl,
-      {Map<String, dynamic> additionalSettings = const {}}) {
+  Future<String?> tryInferringAppId(String standardUrl,
+      {Map<String, dynamic> additionalSettings = const {}}) async {
     return Uri.parse(standardUrl).pathSegments.last;
   }
 
@@ -63,7 +63,7 @@ class FDroid extends AppSource {
     String standardUrl,
     Map<String, dynamic> additionalSettings,
   ) async {
-    String? appId = tryInferringAppId(standardUrl);
+    String? appId = await tryInferringAppId(standardUrl);
     String host = Uri.parse(standardUrl).host;
     return getAPKUrlsFromFDroidPackagesAPIResponse(
         await sourceRequest('https://$host/api/v1/packages/$appId'),
diff --git a/lib/app_sources/github.dart b/lib/app_sources/github.dart
index a34bda2..d75beb2 100644
--- a/lib/app_sources/github.dart
+++ b/lib/app_sources/github.dart
@@ -6,6 +6,7 @@ import 'package:obtainium/app_sources/html.dart';
 import 'package:obtainium/components/generated_form.dart';
 import 'package:obtainium/custom_errors.dart';
 import 'package:obtainium/providers/apps_provider.dart';
+import 'package:obtainium/providers/logs_provider.dart';
 import 'package:obtainium/providers/settings_provider.dart';
 import 'package:obtainium/providers/source_provider.dart';
 import 'package:url_launcher/url_launcher_string.dart';
@@ -13,6 +14,7 @@ import 'package:url_launcher/url_launcher_string.dart';
 class GitHub extends AppSource {
   GitHub() {
     host = 'github.com';
+    appIdInferIsOptional = true;
 
     additionalSourceSpecificSettingFormItems = [
       GeneratedFormTextField('github-creds',
@@ -79,6 +81,44 @@ class GitHub extends AppSource {
     canSearch = true;
   }
 
+  @override
+  Future<String?> tryInferringAppId(String standardUrl,
+      {Map<String, dynamic> additionalSettings = const {}}) async {
+    const possibleBuildGradleLocations = [
+      '/app/build.gradle',
+      'android/app/build.gradle',
+      'src/app/build.gradle'
+    ];
+    for (var path in possibleBuildGradleLocations) {
+      try {
+        var res = await sourceRequest(
+            '${await convertStandardUrlToAPIUrl(standardUrl)}/contents/$path');
+        if (res.statusCode == 200) {
+          try {
+            var body = jsonDecode(res.body);
+            var appId = utf8
+                .decode(base64
+                    .decode(body['content'].toString().split('\n').join('')))
+                .split('\n')
+                .map((e) => e.trim())
+                .where((l) => l.startsWith('applicationId "'))
+                .first
+                .split('"')[1];
+            if (appId.isNotEmpty) {
+              return appId;
+            }
+          } catch (err) {
+            LogsProvider().add(
+                'Error parsing build.gradle from ${res.request!.url.toString()}: ${err.toString()}');
+          }
+        }
+      } catch (err) {
+        // Ignore - ID will be extracted from the APK
+      }
+    }
+    return null;
+  }
+
   @override
   String sourceSpecificStandardizeURL(String url) {
     RegExp standardUrlRegEx = RegExp('^https?://$host/[^/]+/[^/]+');
@@ -97,6 +137,12 @@ class GitHub extends AppSource {
     return creds != null && creds.isNotEmpty ? '$creds@' : '';
   }
 
+  Future<String> getAPIHost() async =>
+      'https://${await getCredentialPrefixIfAny()}api.$host';
+
+  Future<String> convertStandardUrlToAPIUrl(String standardUrl) async =>
+      '${await getAPIHost()}/repos${standardUrl.substring('https://$host'.length)}';
+
   @override
   String? changeLogPageFromStandardUrl(String standardUrl) =>
       '$standardUrl/releases';
@@ -239,7 +285,7 @@ class GitHub extends AppSource {
   ) async {
     return await getLatestAPKDetailsCommon2(standardUrl, additionalSettings,
         (bool useTagUrl) async {
-      return 'https://${await getCredentialPrefixIfAny()}api.$host/repos${standardUrl.substring('https://$host'.length)}/${useTagUrl ? 'tags' : 'releases'}?per_page=100';
+      return '${await convertStandardUrlToAPIUrl(standardUrl)}/${useTagUrl ? 'tags' : 'releases'}?per_page=100';
     }, (Response res) {
       rateLimitErrorCheck(res);
     });
@@ -281,7 +327,7 @@ class GitHub extends AppSource {
   Future<Map<String, List<String>>> search(String query) async {
     return searchCommon(
         query,
-        'https://${await getCredentialPrefixIfAny()}api.$host/search/repositories?q=${Uri.encodeQueryComponent(query)}&per_page=100',
+        '${await getAPIHost()}/search/repositories?q=${Uri.encodeQueryComponent(query)}&per_page=100',
         'items', onHttpErrorCode: (Response res) {
       rateLimitErrorCheck(res);
     });
diff --git a/lib/app_sources/izzyondroid.dart b/lib/app_sources/izzyondroid.dart
index 1773558..d0fcfe8 100644
--- a/lib/app_sources/izzyondroid.dart
+++ b/lib/app_sources/izzyondroid.dart
@@ -18,8 +18,8 @@ class IzzyOnDroid extends AppSource {
   }
 
   @override
-  String? tryInferringAppId(String standardUrl,
-      {Map<String, dynamic> additionalSettings = const {}}) {
+  Future<String?> tryInferringAppId(String standardUrl,
+      {Map<String, dynamic> additionalSettings = const {}}) async {
     return FDroid().tryInferringAppId(standardUrl);
   }
 
@@ -28,7 +28,7 @@ class IzzyOnDroid extends AppSource {
     String standardUrl,
     Map<String, dynamic> additionalSettings,
   ) async {
-    String? appId = tryInferringAppId(standardUrl);
+    String? appId = await tryInferringAppId(standardUrl);
     return FDroid().getAPKUrlsFromFDroidPackagesAPIResponse(
         await sourceRequest(
             'https://apt.izzysoft.de/fdroid/api/v1/packages/$appId'),
diff --git a/lib/main.dart b/lib/main.dart
index a1494bc..98d6d1f 100644
--- a/lib/main.dart
+++ b/lib/main.dart
@@ -21,7 +21,7 @@ import 'package:easy_localization/src/easy_localization_controller.dart';
 // ignore: implementation_imports
 import 'package:easy_localization/src/localization.dart';
 
-const String currentVersion = '0.13.5';
+const String currentVersion = '0.13.6';
 const String currentReleaseTag =
     'v$currentVersion-beta'; // KEEP THIS IN SYNC WITH GITHUB RELEASES
 
diff --git a/lib/pages/add_app.dart b/lib/pages/add_app.dart
index c439f30..b31dc4d 100644
--- a/lib/pages/add_app.dart
+++ b/lib/pages/add_app.dart
@@ -33,6 +33,7 @@ class _AddAppPageState extends State<AddAppPage> {
   AppSource? pickedSource;
   Map<String, dynamic> additionalSettings = {};
   bool additionalSettingsValid = true;
+  bool inferAppIdIfOptional = true;
   List<String> pickedCategories = [];
   int searchnum = 0;
   SourceProvider sourceProvider = SourceProvider();
@@ -78,6 +79,7 @@ class _AddAppPageState extends State<AddAppPage> {
             additionalSettingsValid = source != null
                 ? !sourceProvider.ifRequiredAppSpecificSettingsExist(source)
                 : true;
+            inferAppIdIfOptional = true;
           }
         });
       }
@@ -147,7 +149,8 @@ class _AddAppPageState extends State<AddAppPage> {
           app = await sourceProvider.getApp(
               pickedSource!, userInput, additionalSettings,
               trackOnlyOverride: trackOnly,
-              overrideSource: pickedSourceOverride);
+              overrideSource: pickedSourceOverride,
+              inferAppIdIfOptional: inferAppIdIfOptional);
           // Only download the APK here if you need to for the package ID
           if (sourceProvider.isTempId(app) &&
               app.additionalSettings['trackOnly'] != true) {
@@ -428,6 +431,23 @@ class _AddAppPageState extends State<AddAppPage> {
                     }),
               ],
             ),
+            if (pickedSource != null && pickedSource!.appIdInferIsOptional)
+              GeneratedForm(
+                  key: const Key('inferAppIdIfOptional'),
+                  items: [
+                    [
+                      GeneratedFormSwitch('inferAppIdIfOptional',
+                          label: tr('tryInferAppIdFromCode'),
+                          defaultValue: inferAppIdIfOptional)
+                    ]
+                  ],
+                  onValueChanges: (values, valid, isBuilding) {
+                    if (!isBuilding) {
+                      setState(() {
+                        inferAppIdIfOptional = values['inferAppIdIfOptional'];
+                      });
+                    }
+                  }),
           ],
         );
 
diff --git a/lib/providers/source_provider.dart b/lib/providers/source_provider.dart
index d980e3c..41caa43 100644
--- a/lib/providers/source_provider.dart
+++ b/lib/providers/source_provider.dart
@@ -317,6 +317,7 @@ abstract class AppSource {
   late String name;
   bool enforceTrackOnly = false;
   bool changeLogIfAnyIsMarkDown = true;
+  bool appIdInferIsOptional = false;
 
   AppSource() {
     name = runtimeType.toString();
@@ -434,8 +435,8 @@ abstract class AppSource {
     throw NotImplementedError();
   }
 
-  String? tryInferringAppId(String standardUrl,
-      {Map<String, dynamic> additionalSettings = const {}}) {
+  Future<String?> tryInferringAppId(String standardUrl,
+      {Map<String, dynamic> additionalSettings = const {}}) async {
     return null;
   }
 }
@@ -552,7 +553,8 @@ class SourceProvider {
       AppSource source, String url, Map<String, dynamic> additionalSettings,
       {App? currentApp,
       bool trackOnlyOverride = false,
-      String? overrideSource}) async {
+      String? overrideSource,
+      bool inferAppIdIfOptional = false}) async {
     if (trackOnlyOverride || source.enforceTrackOnly) {
       additionalSettings['trackOnly'] = true;
     }
@@ -592,8 +594,11 @@ class SourceProvider {
         : apk.names.name[0].toUpperCase() + apk.names.name.substring(1);
     return App(
         currentApp?.id ??
-            source.tryInferringAppId(standardUrl,
-                additionalSettings: additionalSettings) ??
+            ((!source.appIdInferIsOptional ||
+                    (source.appIdInferIsOptional && inferAppIdIfOptional))
+                ? await source.tryInferringAppId(standardUrl,
+                    additionalSettings: additionalSettings)
+                : null) ??
             generateTempID(standardUrl, additionalSettings),
         standardUrl,
         apk.names.author[0].toUpperCase() + apk.names.author.substring(1),
diff --git a/pubspec.yaml b/pubspec.yaml
index 54acc82..8d57bd9 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -17,7 +17,7 @@ publish_to: 'none' # Remove this line if you wish to publish to pub.dev
 # https://developer.apple.com/library/archive/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html
 # In Windows, build-name is used as the major, minor, and patch parts
 # of the product and file versions while build-number is used as the build suffix.
-version: 0.13.5+169 # When changing this, update the tag in main() accordingly
+version: 0.13.6+170 # When changing this, update the tag in main() accordingly
 
 environment:
   sdk: '>=2.18.2 <3.0.0'