Yes, is for old phones and such. A mutual told me the main app is bad optimized, and a lot of smartphone here are very VERY old. Mine have like 5 years or so, I think that's like 5 decades in more "develop" countries.
If it's anything like Facebook lite, it's literally a wrapper for the website. Not even a proper app. Usually a worse experience than using a real browser, but the main apps are usually so bad that people with older phones put up with the lite "apps".