Badminton session tracker & rankings app

RallyMouuu is a badminton session tracker: pick who turned up, choose singles (1v1) or doubles (2v2), and it generates a fair rotation across your courts — even playing time, sensible gender mixes, capped benching — then turns every submitted score into a badminton-only Elo/MMR ladder.

How do you run a badminton night with RallyMouuu?

Create a session, set the date and how many courts you have, and pick who’s playing from your crew roster — badminton is the default sport. Choose a format (1v1 singles, 2v2 doubles, or a custom players-per-side) and Rally generates the whole rotation: who plays whom, on which court, in which round. Record each score as games finish and the ladder updates from the results.

How does it handle mens, womens and mixed doubles?

Badminton nights usually want a spread of game types, so the generator has three strategies. Balanced(the default) aims for roughly a third each of Mixed, Mens and Womens games, capped by your roster’s gender skew. Mixed maximises mixed-gender games. MMR ignores gender entirely and builds skill-tiered games with the sides evened out by rating — the closest, most competitive matches. Pure Mens or Womens games collapse into Mixed automatically when a gender is too thin to field a side.

How do the badminton rankings work?

Every player starts at 1000 and Rally runs margin-aware Elo with K=32 on each submitted game. A decisive scoreline counts for more — up to a 1.5× cap — so a 21–9 moves the ratings about 1.2× as much as the base update, while a 21–19 barely adds anything (~1.03×). Singles and doubles feed the same badminton ladder: in doubles a side’s rating is the mean of the pair, and the game’s single rating change applies to both partners.

The ladder is badminton-only. If your crew also plays pickleball or volleyball, each sport keeps its own independent 1000-based ladder — a strong badminton MMR gives you no head start anywhere else.

Can it run several courts at once?

Yes. Tell Rally how many courts you have and it schedules that many simultaneous games per round, rotating players through the courts — a big group gets through far more badminton in the same hall booking. See how the fair doubles round-robin works and how the solo, pairs and team boards differ.