The latest release was on Sep 28, 2020 and this application was downloaded and set up by over 5M users. Samsung and Huawei users install the app quite often. It's free of charge to get the .apk file of SumUp and you can have a look at users' reviews on Droid Informer. This application installer requires 7 MB of free space to work fine on Android 4.1 and above.
Users leave reviews pointing out that you can benefit from the strong sides of the app that are a good layout, excellent support and its low cost. As users state, the main drawback of this application is network issues.