Google is replacing one of Android's most popular apps. Almost exactly ten years ago, Google introduced Assistant, a tool that users could chat to with their voice to undertake a variety of tasks. Now, Google is writing to users to tell them that they will soon no longer be able to use that app and should switch to Gemini instead. That will mean that long-pressing the power button or saying "Hey Google" will call up the newer version of the virtual assistant instead, for instance. Gemini should still be able to do the same tasks as Assistant, and understand the same commands.