So, anyway. . . .
That phone app chess program is systenmatically beatable.
I am now winning about half of the time. It does vary it's moves in response to what it "learns" from my pattern, but once I figure out its new "habits" and it's gets predictable again.
Returning to my old computer game "Chess Titans", I think it is better done than the phone thing.
My weakness is a fairly strong tendency for self delusion, otherwise called stubborn stupidity. And I think I am far less perceptive of the board on screens than in actual board play. I frequently confuse pieces like pawns and bishops, rooks and knights, even king and queen and queen and bishop because it seems I rely on spatial or size cues subconsciously, and the flat screen with very little size differences just makes me stupid.
No excuses though for OB, Siri, Enes and anyone else who beat me. I think when I was 17 I might have ranked a out 1800 on the chess power score, but now might be only 1500. I would benefit from playing more people with unpredictable or unfamiliar proclivities for actual human cognition and purposes.
Playing dumb computers has clearly made me stupid, and playing humans will tend to cure that stupidity.