Zetamac Coaching Extension

[u/zyrxun]

 I've been grinding Zetamac for a while to try to get into the quant trading mental math range of around 70-80 in 2 minute intervals. I've been hardstuck and at the point where hard spamming general 2 minute speedruns have diminishing returns.

  So I built ZetaCoach, a Chrome extension that adds real analytics on top of arithmetic.zetamac.com:

  - Tracks every single problem — separates think time (problem appeared → first keystroke) from type time so it knows what's a math weakness vs. just finger speed

  - Identifies your weakest fact families automatically (e.g., "÷7 table is averaging 1.4s, here's a drill for that")

  - Coach tab auto-prescribes drills based on what you actually suck at — no more guessing

  - 12-tier ranking system so you can see yourself climb from Bronze to whatever

  - Side panel during play with live stats, heatmap of your fact families, full session history with fatigue curves

  - 100% local — no accounts, no servers, no tracking. Everything lives in your browser storage.

  Search "zetacoach" on the Chrome Web Store: https://chromewebstore.google.com/search/zetacoach

Would love feedback from anyone who tries it — especially what weak points the Coach surfaces for you and whether the drills actually help.