Cute, apart from the part where ... sigh. The more software stops being stupid about what gender mixes you should have in relationships, the more it annoys me that nobody ever considers that not everybody is (or wants to be) part of a simple pair bond.
Facebook hasn't figured this one out either; you'll find most poly/etc. people on there either have their status set to "single" or "it's complicated" (there was a fantastically funny day some years ago where all such people I know deleted our relationship statuses simultaneously, causing mass confusion to the people only casually following our existences).
I feel like this isn't really useful feedback on a toy app but ... it would be nice if people wouldn't cast monogamous pairbonding as the only relationship type that "really" exists. I don't feel discriminated against, as such, but I do sometimes feel a little omitted :)