diff --git a/core/core.js b/core/core.js
index 01c4f84b..02bb9d47 100644
--- a/core/core.js
+++ b/core/core.js
@@ -74,12 +74,12 @@ const k_global_settings = {
 	},
 	blob_fetch_age_seconds: {
 		type: 'integer',
-		default_value: undefined,
+		default_value: (platform() == 'android' ? 0.5 * 365 * 24 * 60 * 60 : undefined),
 		description: 'Only blobs mentioned more recently than this age will be automatically fetched.',
 	},
 	blob_expire_age_seconds: {
 		type: 'integer',
-		default_value: undefined,
+		default_value: (platform() == 'android' ? 1.0 * 365 * 24 * 60 * 60 : undefined),
 		description: 'Blobs older than this will be automatically deleted.',
 	},
 };
diff --git a/src/task.c b/src/task.c
index 4c036378..e1f0a1b9 100644
--- a/src/task.c
+++ b/src/task.c
@@ -175,6 +175,7 @@ static bool _export_record_release(tf_task_t* task, export_record_t** export)
 }
 
 static JSValue _tf_task_version(JSContext* context, JSValueConst this_val, int argc, JSValueConst* argv);
+static JSValue _tf_task_platform(JSContext* context, JSValueConst this_val, int argc, JSValueConst* argv);
 static JSValue _tf_task_get_parent(JSContext* context, JSValueConst this_val, int argc, JSValueConst* argv);
 static JSValue _tf_task_exit(JSContext* context, JSValueConst this_val, int argc, JSValueConst* argv);
 static JSValue _tf_task_trace(JSContext* context, JSValueConst this_val, int argc, JSValueConst* argv);
@@ -694,6 +695,19 @@ static JSValue _tf_task_version(JSContext* context, JSValueConst this_val, int a
 	return version;
 }
 
+static JSValue _tf_task_platform(JSContext* context, JSValueConst this_val, int argc, JSValueConst* argv)
+{
+#if defined(_WIN32)
+	return JS_NewString(context, "windows");
+#elif defined(__ANDROID__)
+	return JS_NewString(context, "android");
+#elif defined(__linux__)
+	return JS_NewString(context, "linux");
+#else
+	return JS_NewString(context, "other");
+#endif
+}
+
 exportid_t tf_task_export_function(tf_task_t* task, tf_taskstub_t* to, JSValue function)
 {
 	export_record_t* export = NULL;
@@ -1725,6 +1739,7 @@ void tf_task_activate(tf_task_t* task)
 	tf_util_register(context);
 	JS_SetPropertyStr(context, global, "exit", JS_NewCFunction(context, _tf_task_exit, "exit", 1));
 	JS_SetPropertyStr(context, global, "version", JS_NewCFunction(context, _tf_task_version, "version", 0));
+	JS_SetPropertyStr(context, global, "platform", JS_NewCFunction(context, _tf_task_platform, "platform", 0));
 	JS_SetPropertyStr(context, global, "getFile", JS_NewCFunction(context, _tf_task_getFile, "getFile", 1));
 	JS_FreeValue(context, global);
 }