This is a SMS popup. It is a free, compact SMS app. It has no gorgeous, dazzling features, but it is practical, so you will not miss any SMS! And it is open source! Github: Features: convenient popup window on incoming message. Quickly reply, delete or close the message. Built-in "quick reply" for even faster messaging directly from popup window.
The antivirus report has shown that the tool is totally safe. Ruilin is the creator of this application which is listed among the Lifestyle category. The overall score for the app is 4.2 on Google Play.
It's free to download the .apk file of Pop SMS and you can take a look at users' reviews on Droid Informer. This application installation package requires 774 KB of free space to run on Android 2.2 and higher.