You cannot just download an APK to install a custom ROM. You must prepare your hardware.
To the casual observer, it is a fossil of the 2014 budget tablet market. A piece of plastic and glass destined for a recycling bin. But to the developer sitting across from it, it is a blank canvas demanding a masterpiece. Lenovo A5500-hv Custom Rom
Installing a custom ROM is not just an upgrade; it is necessary to use this tablet for anything beyond a clock or photo frame. You cannot just download an APK to install a custom ROM