diff --git a/sdk/CHANGELOG b/sdk/CHANGELOG
index e2d614a..fd37799 100644
--- a/sdk/CHANGELOG
+++ b/sdk/CHANGELOG
@@ -1,5 +1,13 @@
 SDK更新日志
 
+v5.3
+1.增加了支持日志输出回调的方法:
+ StartWithLog(serviceID, serviceArgsStr string, loggerCallback LogCallback)
+2.优化了socks_client握手端口判断,避免了sstap测试UDP失败的问题..
+3.修复了HTTP(S)\SPS反向代理无法正常工作的问题.
+4.优化了智能判断,减少不必要的DNS解析.
+5.重构了SOCKS和SPS的UDP功能,基于UDP的游戏加速嗖嗖的.
+
 v4.9
 1.修复了HTTP Basic代理返回不合适的头部,导致浏览器不会弹框,个别代理插件无法认证的问题.
 2.内网穿透切换smux到yamux.
diff --git a/sdk/android-ios/sdk.go b/sdk/android-ios/sdk.go
index fd5c898..67a6934 100644
--- a/sdk/android-ios/sdk.go
+++ b/sdk/android-ios/sdk.go
@@ -23,12 +23,31 @@ import (
 	kingpin "gopkg.in/alecthomas/kingpin.v2"
 )
 
-const SDK_VERSION = "5.2"
+const SDK_VERSION = "5.3"
 
 var (
 	app *kingpin.Application
 )
 
+type LogCallback interface {
+	Write(line string)
+}
+type logCallback interface {
+	Write(line string)
+}
+type logWriter struct {
+	callback LogCallback
+}
+
+func (s *logWriter) Write(p []byte) (n int, err error) {
+	s.callback.Write(string(p))
+	return
+}
+
+func Start(serviceID, serviceArgsStr string) (errStr string) {
+	return StartWithLog(serviceID, serviceArgsStr, nil)
+}
+
 //Start
 //serviceID : is service identify id,different service's id should be difference
 //serviceArgsStr: is the whole command line args string
@@ -38,7 +57,7 @@ var (
 //and so on.
 //if an error occured , errStr will be the error reason
 //if start success, errStr is empty.
-func Start(serviceID, serviceArgsStr string) (errStr string) {
+func StartWithLog(serviceID, serviceArgsStr string, loggerCallback LogCallback) (errStr string) {
 	//define  args
 	tcpArgs := tcpx.TCPArgs{}
 	httpArgs := httpx.HTTPArgs{}
@@ -337,12 +356,19 @@ func Start(serviceID, serviceArgsStr string) (errStr string) {
 	}
 	log.SetFlags(flags)
 
-	if *logfile != "" {
-		f, e := os.OpenFile(*logfile, os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0600)
-		if e != nil {
-			log.Fatal(e)
+	if loggerCallback == nil {
+		if *logfile != "" {
+			f, e := os.OpenFile(*logfile, os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0600)
+			if e != nil {
+				log.Fatal(e)
+			}
+			log.SetOutput(f)
 		}
-		log.SetOutput(f)
+	} else {
+
+		log.SetOutput(&logWriter{
+			callback: loggerCallback,
+		})
 	}
 
 	//regist services and run service