LimitLine changeloghttps://limitline.org/changelog2026-10-21T12:00:00ZLimitLineTry Pro first, and never lose your keytag:limitline.org,2026-10-21:changelog-42026-10-21T12:00:00Z<ul><li>Free users can now try every Pro chart and analysis tool on its built-in example before buying.</li><li>Your license key is emailed to you after you pay, with a link that unlocks LimitLine on any device.</li><li>Lost your key or switched computers? In the app, open License and choose “Lost your key, or using a new device?” to get it emailed again.</li><li>Customize on the Free plan: chart titles, units, target line, Cpk goal, date or lot labels, colors and height.</li><li>New Learn guides with worked examples: Cp and Cpk, I-MR and X̄-R charts, the p chart, the 8 Nelson rules, choosing a control chart, gauge R&R and OEE.</li></ul>Student price, phone layout and the PDF reporttag:limitline.org,2026-10-21:changelog-32026-10-21T12:00:00Z<ul><li>Student license ($15): confirm your school email with a 6-digit code, then pay. Manual checks for certification candidates.</li><li>The app now works properly on a phone.</li><li>One-page PDF report of any chart (Pro).</li><li>Save and open project files with your data and settings; they stay on your device.</li><li>Public validation page: every published reference case LimitLine is tested against, with the datasets to rerun them yourself.</li><li>New logo and a cleaner, centred site design.</li></ul>More accurate, more checkstag:limitline.org,2026-10-21:changelog-22026-10-21T12:00:00Z<ul><li>Cpk and Ppk now show a 95% confidence interval, so small samples don't look more certain than they are.</li><li>Run charts use the Anhøj rules (longest run and number of crossings).</li><li>More accurate means and standard deviations on hard data (compensated summation), checked against NIST's certified accuracy datasets on every release.</li><li>Laney p′, u charts with unequal units and gauge R&R are checked against published examples on every release.</li><li>Refunded purchases no longer keep a working license key, and license checks were hardened.</li></ul>LimitLine launchestag:limitline.org,2026-10-20:changelog-12026-10-20T12:00:00Z<ul><li>Control charts (I-MR, X̄-R, X̄-S, p, np, c, u), Nelson rules and capability (Cp, Cpk, Pp, Ppk) in the browser, with plain-English verdicts.</li><li>Scan a photo, PDF, Word or Excel file into numbers.</li><li>Analysis tools (hypothesis tests, regression, gauge R&R, 2-level DOE and more) and Lean · TPS tools (OEE, takt and line balance, kanban, heijunka).</li><li>Free plan, and Pro as a one-time purchase. Your data stays on your device.</li></ul>