Niantic will stop supporting Pokémon Go on 32bit Android devices as of August. The developer only wants to focus on the 64bit version of the game. The game will no longer work on many smartphones from before 2015.
The end of 32bit support will take effect in early August with a mandatory update for Pokémon Go. Niantic mentions a number of smartphones that are no longer supported from then on. These are, for example, the Samsung Galaxy S4, S5 and Note 3, the Sony Xperia Z2 and Z3 and the first Motorola Moto G. These are smartphones that have a 32bit soc and therefore do not support 64bit apps.
Niantic reports that many Android devices from before 2015 will no longer work. Qualcomm has been making socs that also support 64bit since 2014, the first was the Snapdragon 410. In the higher segment, the Snapdragon 808 and 810 were first Qualcomm socs with 64bit support.
Last year, Niantic dropped support for Android 4.4 Kitkat and older, to focus development on fewer versions of the operating system. Pokémon Go has only been running on Android 5.0 or newer since then. The change does not affect the iOS version of the game. It works on phones with iOS 11 or later.