diff --git a/xcode/build_phases/api_generator.sh b/xcode/build_phases/api_generator.sh
old mode 100644
new mode 100755
index cb09e6b..3748c44
--- a/xcode/build_phases/api_generator.sh
+++ b/xcode/build_phases/api_generator.sh
@@ -1,9 +1,144 @@
+#!/bin/sh
+
+# Description:
+#   Generates API models & methods.
+#
+# Parameters:
+#   $1 - api generator version.
+#
+# Optional environment variables:
+#   OUTPUT_PATH - path to Generated folder.
+#
+# Examples of usage:
+#   . api_generator.sh 1.4.0-beta1
+#   . api_generator.sh 1.4.0-beta1 ${TARGET_NAME}/Generated
+#
+
+readonly EXIT_SUCCESS=0
+readonly EXIT_FAILURE=1
+
+readonly TRUE=0
+readonly FALSE=1
+
+is_force_run()
+{
+    if [ -z "${FORCE_RUN}" ]; then
+        return ${FALSE}
+    fi
+
+    local -r STR_MODE=`tr "[:upper:]" "[:lower:]" <<< ${FORCE_RUN}`
+
+    if [ ${STR_MODE} == "yes" ] || [ ${STR_MODE} == "true" ] || [ ${STR_MODE} == "1" ]; then
+        return ${TRUE}
+    fi
+
+    return ${FALSE}
+}
+
+get_current_commit()
+{
+    if [ -z "${CURRENT_COMMIT}" ]; then
+        if [ -z "${REPO_PATH}" ]; then
+            if [ ! -z "${1}" ]; then
+                echo `git -C ${1} rev-parse --verify HEAD`
+            else
+                echo `git rev-parse --verify HEAD`
+            fi
+        else
+            echo `git -C ${REPO_PATH} rev-parse --verify HEAD`
+        fi
+    else
+        echo ${CURRENT_COMMIT}
+    fi
+}
+
+is_nothing_changed_since_last_check()
+{
+    if is_force_run; then
+        echo "Force run detected. Skipping commits comparison."
+        return ${EXIT_FAILURE}
+    fi
+
+    if [ -z "${COMMIT_FILE_PATH}" ]; then
+        if [ ! -z "${1}" ]; then
+            local -r COMMIT_FILE_PATH=${1}
+        else
+            echo "COMMIT_FILE_PATH should be defined or passed as first argument!"
+            return ${EXIT_FAILURE}
+        fi
+    fi
+
+    if [ -z "${2}" ]; then
+        local -r CURRENT_COMMIT=`get_current_commit`
+    else
+        local -r CURRENT_COMMIT=${2}
+    fi
+
+    local -r LAST_CHECKED_COMMIT=`cat ${COMMIT_FILE_PATH}` || ""
+
+    if [ ${CURRENT_COMMIT} = "${LAST_CHECKED_COMMIT}" ]; then
+        return ${EXIT_SUCCESS}
+    else
+        return ${EXIT_FAILURE}
+    fi
+}
+
+record_current_commit()
+{
+    if is_force_run; then
+        echo "Force run detected. Commit won't be recorder."
+        exit ${EXIT_SUCCESS}
+    fi
+
+    if [ -z "${1}" ]; then
+        local -r CURRENT_COMMIT=`get_current_commit`
+    else
+        local -r CURRENT_COMMIT=${1}
+    fi
+
+    if [ -z "${COMMIT_FILE_PATH}" ]; then
+        if [ ! -v "${2}" ]; then
+            local -r COMMIT_FILE_PATH=${2}
+        else
+            echo "COMMIT_FILE_PATH should be defined or passed as second argument!"
+            return ${EXIT_FAILURE}
+        fi
+    fi
+
+    echo ${CURRENT_COMMIT} > ${COMMIT_FILE_PATH}
+}
+
+readonly BUILD_PHASES_DIR=${SRCROOT}/build_phases
+
+mkdir -p ${BUILD_PHASES_DIR}
+
+readonly COMMIT_FILE_PATH=${BUILD_PHASES_DIR}/api-generator-commit
+
+readonly REPO_PATH="common"
+
+if is_nothing_changed_since_last_check; then
+    echo "Nothing was changed models generation skipped."
+    exit ${EXIT_SUCCESS}
+fi
+
 VERSION=$1
 FILE_NAME="api-generator-${VERSION}.jar"
 
+if [ -z "${OUTPUT_PATH}" ]; then
+    if [ ! -z "${2}" ]; then
+        readonly OUTPUT_PATH=${2}
+    else
+        readonly OUTPUT_PATH="Generated"
+    fi
+fi
+
+mkdir -p ${OUTPUT_PATH}
+
 # download api generator
-link="https://dl.bintray.com/touchin/touchin-tools/ru/touchin/api-generator/${VERSION}/${FILE_NAME}"
-. build-scripts/xcode/aux_scripts/download_file.sh ${FILE_NAME} ${link}
+readonly DOWNLOAD_URL="https://maven.dev.touchin.ru/ru/touchin/api-generator/api-generator/${VERSION}/${FILE_NAME}"
+. build-scripts/xcode/aux_scripts/download_file.sh ${FILE_NAME} ${DOWNLOAD_URL}
 
 # execute api generator
-java -Xmx6g -jar "Downloads/${FILE_NAME}" generate-client-code --output-language SWIFT --specification-path common/api --output-path ${PRODUCT_NAME}/Generated --single-file true
+java -Xmx6g -jar "Downloads/${FILE_NAME}" generate-client-code --output-language SWIFT --specification-path common/api --output-path ${OUTPUT_PATH} --single-file true
+
+record_current_commit