The application has 50+ million downloads now, showing that it has been a hit in the countries it launched.
"We're excited to bring Messenger Lite to Android users in four new markets, including Canada, Ireland, the United Kingdom and the USA", a Facebook spokesperson told TechCrunch. There are no indications for an iOS version and Facebook has no plans to launch it.
Since then, Messenger Lite rolled out to over 100 countries earlier in 2017, but there were some notable exclusions, which included the US, UK, Ireland, and Canada.
Lite app is always targeted for users in developing countries who can only afford mid-range to entry level Android devices.
One of the main reasons cited by Facebook to introduce Messenger Lite was that there are over a billion people who still don't have access to high speed 3G or 4G network. It's only 10MB in size, which is a significant cut down from the original Facebook Messenger app's download size of 46MB.
Android: Once upon a time, Facebook's Messenger app was just a way to send chat message to your friends. People seem to enjoy its simple nature and data-friendly approach, even if they do have high-end smartphones. If it can keep people on Messenger, it's more likely to retain them in the rest of its family of apps. This is probably one of the main reason why Facebook has chose to now bring it to the United States and the other countries mentioned.
The app is available on the Google Play Store, and it is compatible with Android devices that are running on as low as Android 2.3 Gingerbread. That is not to say that adults won't use it. People in developed countries also have to deal with expensive data.