During the live stream “ Yo-kai Watch 8th Anniversary Special ” it was announced that the Yo-kai Watch 1 SmaPho game iOS and Android devices this Saturday (July 10th).
It's worth remembering that Level-5 announced a smartphone version of the first Yo-kai Watch game for the Nintendo 3DS in July 2016, although this finalized version (with a new name) is different from what was announced five years ago.
Source: ANN