Use APKPure App
Get Wifi Helper - Switcher old version APK for Android
여러 무선 네트워크와 범위에 있습니까? 난 당신을 도울 수 있습니다!
Are you in a range with multiple WiFi networks? The "WiFi Helper" will identify the best signal and suggest you to change to the nearest one.
You can also define the tolerate level for those moments when you don't wanna be notified when there are to many access point with little difference between their signal strength.
OPEN SOURCE PROJECT: https://github.com/julianogv/wifihelper