diff --git a/how-to-clean-uninstall-apps-on-macos-an-open-source-alternative-to-appcleaner-by-freemacsoft/README.md b/how-to-clean-uninstall-apps-on-macos-an-open-source-alternative-to-appcleaner-by-freemacsoft/README.md
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+<!--
+Title: How to clean uninstall apps on macOS (an open source alternative to AppCleaner by FreeMacSoft)
+Description: Learn how to clean uninstall apps on macOS (an open source alternative to AppCleaner by FreeMacSoft).
+Author: Sun Knudsen <https://github.com/sunknudsen>
+Contributors: Sun Knudsen <https://github.com/sunknudsen>
+Reviewers:
+Publication date: 2020-09-21T15:50:15.415Z
+-->
+
+# How to clean uninstall apps on macOS (an open source alternative to AppCleaner by FreeMacSoft)
+
+## Guide
+
+### Step 1: create `/usr/local/bin` folder
+
+```shell
+sudo mkdir -p /usr/local/bin
+sudo chown $(whoami):admin /usr/local/bin
+```
+
+### Step 2: download [app-cleaner.sh](app-cleaner.sh) ([PGP signature](./app-cleaner.sh.sig), [PGP public key](https://sunknudsen.com/sunknudsen.asc))
+
+```shell
+curl -o /usr/local/bin/app-cleaner.sh https://sunknudsen.com/static/media/privacy-guides/how-to-clean-uninstall-apps-on-macos/app-cleaner.sh
+chmod +x /usr/local/bin/app-cleaner.sh
+```
+
+## Usage
+
+```console
+$ app-cleaner.sh /Applications/AppCleaner.app
+Checking for running processes...
+Finding application data...
+/Applications/AppCleaner.app
+/Users/johndoe/Library/Preferences/net.freemacsoft.AppCleaner.plist
+/Users/johndoe/Library/Saved Application State/net.freemacsoft.AppCleaner.savedState
+Move application data to trash (y or n)? y
+Moving application data to trash...
+Done
+```
diff --git a/how-to-clean-uninstall-apps-on-macos-an-open-source-alternative-to-appcleaner-by-freemacsoft/app-cleaner.sh b/how-to-clean-uninstall-apps-on-macos-an-open-source-alternative-to-appcleaner-by-freemacsoft/app-cleaner.sh
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+++ b/how-to-clean-uninstall-apps-on-macos-an-open-source-alternative-to-appcleaner-by-freemacsoft/app-cleaner.sh
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+#! /bin/sh
+
+if [ -z "$1" ]; then
+  printf "%s\n" "Usage: app-cleaner.sh /path/to/app.app"
+  exit 1
+fi
+
+IFS=$'\n'
+
+red=$'\e[1;31m'
+nc=$'\e[0m'
+
+if [ ! -e "$1/Contents/Info.plist" ]; then
+  printf "%s\n" "Cannot find app plist"
+  exit 1
+fi
+
+bundle_identifier=$(/usr/libexec/PlistBuddy -c "Print CFBundleIdentifier" "$1/Contents/Info.plist" 2> /dev/null)
+
+if [ "$bundle_identifier" = "" ]; then
+  printf "%s\n" "Cannot find app bundle identifier"
+  exit 1
+fi
+
+printf "%s\n" "Checking for running processes..."
+sleep 1
+
+app_name=$(basename $1 .app)
+
+processes=($(pgrep -afil "$app_name" | grep -v "app-cleaner.sh"))
+
+if [ ${#processes[@]} -gt 0 ]; then
+  printf "%s\n" "${processes[@]}"
+  printf "${red}%s${nc}" "Kill running processes (y or n)? "
+  read -r answer
+  if [ "$answer" = "y" ]; then
+    printf "%s\n" "Killing running processes..."
+    sleep 1
+    for process in "${processes[@]}"; do
+      echo $process | awk '{print $1}' | xargs kill
+    done
+  fi
+fi
+
+home_dir=~
+
+paths=()
+
+paths+=($(find /private/var/db/receipts -iname "*$app_name*.bom" -maxdepth 1 -prune 2>&1 | grep -av "Permission denied"))
+paths+=($(find /private/var/db/receipts -iname "*$bundle_identifier*.bom" -maxdepth 1 -prune 2>&1 | grep -av "Permission denied"))
+
+if [ ${#paths[@]} -gt 0 ]; then
+  printf "%s\n" "Saving bill of material logs to desktop..."
+  sleep 1
+  for path in "${paths[@]}"; do
+    mkdir -p "$home_dir/Desktop/$app_name"
+    lsbom -f -l -s -p f $path > "$home_dir/Desktop/$app_name/$(basename $path).log"
+  done
+fi
+
+printf "%s\n" "Finding app data..."
+sleep 1
+
+locations=(
+  "$home_dir/Library"
+  "$home_dir/Library/Application Support"
+  "$home_dir/Library/Application Support/CrashReporter"
+  "$home_dir/Library/Containers"
+  "$home_dir/Library/Caches"
+  "$home_dir/Library/Group Containers"
+  "$home_dir/Library/Internet Plug-Ins"
+  "$home_dir/Library/LaunchAgents"
+  "$home_dir/Library/Logs"
+  "$home_dir/Library/Preferences"
+  "$home_dir/Library/Saved Application State"
+  "$home_dir/Library/WebKit"
+  "/Library"
+  "/Library/Application Support"
+  "/Library/Application Support/CrashReporter"
+  "/Library/Caches"
+  "/Library/Extensions"
+  "/Library/Internet Plug-Ins"
+  "/Library/LaunchAgents"
+  "/Library/LaunchDaemons"
+  "/Library/Logs"
+  "/Library/Preferences"
+  "/private/var/db/receipts"
+  "/usr/local/bin"
+  "/usr/local/etc"
+  "/usr/local/opt"
+  "/usr/local/sbin"
+  "/usr/local/share"
+  "/usr/local/var"
+)
+
+paths=($1)
+
+for location in "${locations[@]}"; do
+  paths+=($(find "$location" -iname "*$app_name*" -maxdepth 1 -prune 2>&1 | grep -av "No such file or directory" | grep -av "Permission denied"))
+done
+
+for location in "${locations[@]}"; do
+  paths+=($(find "$location" -iname "*$bundle_identifier*" -maxdepth 1 -prune 2>&1 | grep -av "No such file or directory" | grep -av "Permission denied"))
+done
+
+paths=($(printf "%s\n" "${paths[@]}" | sort -u));
+
+printf "%s\n" "${paths[@]}"
+
+printf "${red}%s${nc}" "Move app data to trash (y or n)? "
+read -r answer
+if [ "$answer" = "y" ]; then
+  printf "%s\n" "Moving app data to trash..."
+  sleep 1
+  for path in "${paths[@]}"; do
+    osascript -e "tell application \"Finder\" to delete POSIX file \"$path\"" > /dev/null
+  done
+  printf "%s\n" "Done"
+fi
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