Sums 2.0 — the whole app is now a calculator. • A new look: every screen is the device — an LCD, keys that press, a lime equals • New: estimate the sum of a sequence of numbers, ≈ 240 + 241 + … + 350 • Share your daily as a picture of the device • Stats on an instrument panel: level, accuracy, streak, your last four weeks • Past dailies grouped by week • Watch every Premium mode play before you try it • A new icon, and fixes throughout

• Your home screen now says something: what yesterday looked like, what moved this week, what to train next • After every run — which groups went up, which slipped, which skills stopped costing you thought • Premium: replay any daily from the last 30 days, exactly as it ran • Result screens scroll properly, and sharing moved up into the header • Fixes throughout

• See which skills are automatic and which still cost you thought • New Automatic mode — drills what you get right but slowly • New problems: multiplication shortcuts, price with tax, hourly pay as a year • Premium: unlimited streak freezes and one repair a month • A reminder 24 hours before a trial converts, plus fixes throughout

• New setup check — it places your level more accurately • Smarter engine: new problem types, divisibility, and a daily that varies day to day • Refreshed design across the app • Bug fixes

NEW: DIVISIBILITY "Does 4 728 divide by 3 with no remainder?" It does — 4+7+2+8 = 21. One rule, applied to a six-digit number in about a second. It's the first family of problems here that isn't simply more digits to carry, and it runs from the gentle end (2, 5, 10) to the genuinely hard one (remainders of 7 and 11). THE DAILY VARIES NOW Four shapes rotate through the week: a steady climb, money first, a sawtooth, and a long ramp that falls away at the end. Each slot draws on a wider set of problems, and the odd question out — the missing operand, the true/false — moves around instead of always being the fifth. MORE AT BOTH ENDS Nine new problem types fill the easy warm-up and the hard finish. A Survival run and the last third of a daily are no longer the same handful of questions. DIFFICULTY THAT READS YOU PROPERLY A lucky guess on multiple choice no longer counts as skill, and a right answer that took its time no longer counts against you. Being able to do it and doing it fast are two different things, and they are measured separately now. MISTAKES COME BACK SOLVABLE Review used to hand you the exact problem you had just failed, at the difficulty you failed it. Now a repeat aims at what you can do today — and patterns actually clear instead of piling up.