diff --git a/Makefile b/Makefile
index 0a690d3b1..73535628d 100644
--- a/Makefile
+++ b/Makefile
@@ -348,25 +348,6 @@ androidupdate: all
 	-rm $(ANDROID_LAUNCHER_DIR)/assets/module/koreader-*
 	# in runtime luajit-launcher's libluajit.so will be loaded
 	-rm $(INSTALL_DIR)/koreader/libs/libluajit.so
-	# create zip package
-	cd $(INSTALL_DIR)/koreader && \
-		zip -9 -r \
-			../../koreader-android-$(MACHINE)-$(VERSION).zip \
-			* -x "resources/fonts/*" "resources/icons/src/*" "spec/*" \
-			$(ZIP_EXCLUDE)
-	# generate android update package index file
-	zipinfo -1 koreader-android-$(MACHINE)-$(VERSION).zip > \
-		$(INSTALL_DIR)/koreader/ota/package.index
-	rm -f koreader-android-$(MACHINE)-$(VERSION).zip
-	echo "ota/package.index" >> $(INSTALL_DIR)/koreader/ota/package.index
-	cp $(INSTALL_DIR)/koreader/git-rev $(INSTALL_DIR)/koreader/ota-rev
-	# don't update the git-rev so that the next start won't revert back
-	# the older 7z version in the assets
-	$(ISED) '/git-rev/d' $(INSTALL_DIR)/koreader/ota/package.index
-	# make gzip android update for zsync OTA update
-	-cd $(INSTALL_DIR)/koreader && \
-		tar -czah --no-recursion -f ../../koreader-android-$(MACHINE)-$(VERSION).targz \
-		-T ota/package.index
 	# make android update apk
 	cd $(INSTALL_DIR)/koreader && 7z a -l -m0=lzma2 -mx=1 \
 		../../$(ANDROID_LAUNCHER_DIR)/assets/module/koreader-$(VERSION).7z * \
diff --git a/platform/android/llapp_main.lua b/platform/android/llapp_main.lua
index e1fa9c255..88611eda8 100644
--- a/platform/android/llapp_main.lua
+++ b/platform/android/llapp_main.lua
@@ -16,22 +16,6 @@ if file ~= nil then
     A.LOGI("intent file path " .. file)
 end
 
--- update koreader from ota
-local function update()
-    local new_update = "/sdcard/koreader/ota/koreader.update.tar"
-    local installed = "/sdcard/koreader/ota/koreader.installed.tar"
-    local update_file = io.open(new_update, "r")
-    if update_file ~= nil then
-        io.close(update_file)
-        A.showProgress()
-        if os.execute("tar xf " .. new_update) == 0 then
-            os.execute("mv " .. new_update .. " " .. installed)
-        end
-        A.dismissProgress()
-    end
-
-end
-
 -- (Disabled, since we hide navbar on start now no need for this hack)
 -- run koreader patch before koreader startup
 pcall(dofile, "/sdcard/koreader/patch.lua")