A simple way to check if a number uses WhatsApp (WA) Messenger - then view their WA profile/message/call them. - Enter a number and check if they are using WA Messenger! - View WA profiles (if user has made visible) - Chat without saving number - message/call an unsaved number on WA (no need to add contact to message on WA) - Message myself (send WA messages/attachments to yourself by entering your own number) - Find your phone neighbor on WA - Check which of your contacts are using WA - see a list of all your saved contacts that use WA Messenger When using the app, you will need to select the persons country from the dropdown list (to auto-populate the international country code e.g. US will add +1). Then type in the telephone number (include local area codes if applicable, but do not include any + or leading 0s). This app (Check Number WA) does not represent nor is it affiliated with WhatsApp.