Little Chess Partner Doesn't Recognize 3 Repetitive Moves?!

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Little Chess Partner had me on the ropes in the end game as usual, but I thought I had managed a draw after he put me in check using the same three moves consecutively. My king and his rook could've danced all night. Am I missing something?

an_arbitrary_name

The chess game on my phone doesn't recognise this either.  In fact, it doesn't recognise draws at all.