The latest update was on Oct 22, 2019 and Walli was downloaded and installed by over 10M users. The average user rating of the app is 4.8. Keep in mind the important detail: advertisements are a part of this application and it offers in-app purchases.
Samsung and Blu users download Walli quite often.
The way users see it, you can benefit from the strong sides of the app that are a well-designed UI, outstanding performance and tons of features. As users state, there are some disadvantages, they are server issues, lots of advertisements, annoying notifications and screen freezes.