Find any calculator without opening the app. • Spotlight now finds all 214 calculators and all 145 reference formulas. Search "compound interest" or "BMI" from your Home Screen and go straight there. • Two new Shortcuts and Siri actions: Open Calculator and Look Up Formula. Ask for a formula and get it read back without opening anything. • Fixed max and min returning the wrong answer. • The Home Screen name is now "Nummeric Calc", so it no longer gets cut off. • The Mac app got a big update too — all eight themes, plus Siri and Shortcuts support. It's included with your purchase.

You can now turn diagnostics off. Nummeric sends anonymous crash reports and usage analytics to help find and fix bugs. That's now a switch you control: Settings → Share Diagnostics & Analytics. It's on by default, and turning it off stops collection entirely — not just uploading. As always: no ads, no subscription, no account, and your calculations never leave your device.

Nummeric 4.1 — smoother input, cleaner screens. A BETTER GRAPH KEYBOARD • Graphing now has a purpose-built keypad — numbers, operators, functions, π, a letter row for parameters, and backspace, right where you need them. No more fighting the system keyboard, and the equation you're typing stays in view the whole time. STEP SOLVER, REFINED • Quick math symbols (^ √ π ≤ ≥) sit just above the keyboard, and a new "Random" button drops in an example to try with one tap. POLISH & FIXES • Recent-calculation chips no longer get cut off • Scientific mode lays out cleanly — no more crowding at the top • The keyboard no longer pushes page headers off-screen • General layout and stability improvements throughout Thanks for using Nummeric! A quick review genuinely helps — and we read every one.

Nummeric 4.0 — scan, split, and a bigger, bolder look. SCAN RECEIPTS Point your camera at any receipt and Nummeric reads it instantly — itemized totals, tax, and tip, all parsed for you. Splitting the check? One tap shows exactly what each person owes. Find it in the calculator menu, the RPN keypad, or right inside the Tip tab. DRAG & DROP NUMBERS Drop a number or expression onto the calculator, RPN stack, or converter to load it instantly — and drag converter results straight into Notes, Mail, or any other app. Your numbers go where you need them. BIGGER, BOLDER TEXT Full Dynamic Type support: results and readouts now scale to the text size you've set in Settings, staying crisp and readable right up to the largest accessibility sizes. A MORE REFINED LOOK Subtle new depth and finish across the app, with a gentle shine on the equals key when your answer lands. IMPROVEMENTS & FIXES • More accurate receipt reading across single- and two-column layouts and large totals • Smoother camera scanning and steadier on-screen gestures • Sharper exponent and order-of-operations handling • Polish and reliability fixes throughout Thanks for using Nummeric. Love it? A quick review really helps. Got a request? We read every one.

What's New in Nummeric -Scan Receipts Point your camera at any receipt and Nummeric reads it instantly — itemized totals, tax, and tip, all parsed for you. Splitting the bill? Tap once to see exactly what each person owes. -Drag & Drop Numbers Drag any result straight into Notes, Mail, or another app — and drop a number or expression back onto the display to pick up where you left off. Works across the calculator, RPN, and converter. -Bigger, Bolder Text Full Dynamic Type support: your results and readouts now scale to the text size you've set in Settings, with everything staying crisp and readable — right up to the largest accessibility sizes. -Refined Look Subtle new depth and finish across the app, plus a little shine on the equals key when your answer lands. Thanks for using Nummeric. Got feedback or a feature request? We read every review.

• Fresh Soft look — a new neumorphic theme with gently sculpted, raised buttons and panels is now the default. Prefer something else? All other themes are still one tap away in Settings → Appearance. • Order of operations, done right — the calculator now follows standard BODMAS/PEMDAS by default, so 2 + 3 × 4 = 14. Prefer a classic left-to-right calculator? Switch it in Settings → Calculator → Order of Operations. • More accurate math across the app: – log now means base-10 and ln means natural log, everywhere – Exponents follow math convention (2^2^3 = 256) – Programmer mode shows true two’s-complement values and logical shifts – Sharper Savings (APY) and home-affordability results – Statistics now show both sample and population standard deviation – Clearer step-by-step algebra and US unit labels • Polish & fixes — refined percentages on the keypad, fairer tip splitting, and lots of small improvements throughout. Thanks for using Nummeric! Got feedback? We read every review.

Apple Intelligence, made clear Nummeric now checks Apple Intelligence status in real time — no need to relaunch after enabling it in Settings. If on-device AI isn't active, the app tells you exactly why and what to check: Apple Intelligence is on, Siri is on, and your iPhone and Siri use the same language. (A language mismatch is the usual culprit — now it's a two-second fix instead of a mystery.) Clearer wording throughout, so "off" never looks like "unsupported." Reliability & polish Smoother, more dependable behavior across the calculator, Step Solver, graphing, notebook, converter, and matrix tools. Various small UI refinements and stability improvements under the hood. Nummeric is still 100% free — no subscription, no ads, no tracking, no account. If it's helping you, a quick rating really makes a difference. Thank you!

This update is all about polish, reliability, and feeling great on every Apple device. We fixed a long list of bugs, tightened up performance, and brought iPhone, iPad, Mac, and Apple Watch closer to perfect parity. Mac catches up to iPhone - Sales Tax and Income Tax tools are now available on Mac - More calculators and views work consistently across Mac and iOS, so your workflow feels the same everywhere Smarter, faster graphing - Plotting inequalities, derivatives, and shaded areas is noticeably quicker thanks to a rebuilt compiled engine - Smoother panning and zooming on complex graphs Rock-solid sync & history - More reliable iCloud sync, so your history, notebooks, and pinned calculators stay in step across devices - Editable history is more dependable, with fewer hiccups when syncing - Optional Face ID lock keeps your calculation history private RPN improvements - Better handling of edge cases and invalid results, so the stack never gets stuck in a bad state - More predictable behavior when switching modes or restoring a session Widgets, Shortcuts & Spotlight - The interactive Home Screen widget is more responsive and stays in sync with the app - Tip, conversion, and other Shortcuts now respect your currency and settings correctly - Your specialized calculators are properly indexed in Spotlight, so they're easy to find from search On-device AI & Step Solver - Cleaner error handling when the AI assistant can't complete a response - Fixes to the step-by-step solver, including a false "not available" notice on Mac Accessibility & everyday polish - Improved VoiceOver labels and clearer focus order throughout the app - Refined deep links so taps from widgets, Shortcuts, and shared notes open exactly where you expect - Numerous small UI fixes, tighter layouts, and better defaults Under the hood - Resolved several rare crashes and memory leaks - Improved math correctness in a few uncommon expressions - General stability and performance improvements Nummeric is still 100% free — no subscription, no ads, no tracking, no account required. If you're enjoying the app, a quick rating or review really helps. Thank you for using Nummeric!

This update sharpens Nummeric across the board. New • Sales Tax and Income Tax calculators now on Mac, matching iPhone and iPad • Learning Paths to build skills step by step Improved • Faster, smoother History and Notebook with large libraries • Tip and unit-conversion shortcuts now respect your currency and update the widget instantly • Step-by-Step Solver is clearer about what it can do on your device • More reliable links from Spotlight, widgets, and shared notes — they open exactly where you expect Fixed • Squashed edge cases in RPN mode and graphing for rock-solid results • Polished accessibility and a handful of small interface rough edges Everything still runs entirely on your device. Your math stays yours.

**See the Math** — Tap any result to see the step-by-step derivation. Formulas and visual breakdowns are now available across all 214 calculators. **Knowledge Center** — A new reference hub in the menu with 12+ guides covering features you might have missed. **RPN Mode Upgrades** — Undo support and register improvements for power users. **Polished Throughout** — Consistent theming with design tokens, improved accessibility, and dozens of stability fixes across nine audit passes.

VISUAL MATH — SEE THE WORK Every formula now renders with proper math typography — fractions with horizontal bars, superscripts, square root radicals, and serif notation. Step-by-step derivations automatically highlight what changed between each step in your theme's accent color. Play through solutions with animated step controls or tap prev/next at your own pace. Step type badges (formula, substitution, simplification, result) make it easy to follow along. CATEGORY DIAGRAMS Geometry calculators display labeled shape diagrams alongside results. Finance calculators show interactive growth timelines with year markers and balance curves. Matrix operations render visual grids with bracket notation and highlighted pivot elements. 214 FORMULA CALCULATORS Finance, fitness, chemistry, physics, geometry, statistics, tax, engineering, and more — each with "See the Math" step-by-step derivations, rich typography, and visual diagrams where applicable. KNOWLEDGE CENTER In-app documentation hub covering all 14 modules with searchable guides — from calculator basics to graphing, step solver, matrix, programmer mode, converters, and more. APPLE INTELLIGENCE Ask Arix anything in plain English — "what's 18% of $240 split 4 ways" — and get instant answers powered entirely on-device. AI explains calculations, scans receipts, and cleans up notebook entries. Your math never leaves your phone. 3D SURFACE PLOTTING Visualize equations as 3D surfaces with SceneKit rendering, rotation, zoom, and wireframe toggle. Built into the graphing tab alongside 2D Cartesian, polar, parametric, and implicit plotting. RPN MODE Full reverse-polish-notation calculator with visual four-register stack (X, Y, Z, T), stack depth indicator, and all scientific functions. iMESSAGE CALCULATOR & KEYBOARD Do quick math inside Messages or any app. Tap Send to share as a rich bubble, or tap Insert to drop results into any text field. EQUATION & RECEIPT SCANNER Point your camera at handwritten or printed equations — Arix reads them instantly using on-device Vision OCR. Scan receipts and tap any detected number to pull it into your calculation. VOICE INPUT Say "twenty percent of one fifty" and Arix converts your words into math. Fully on-device. LIVE ACTIVITIES & SIRI SHORTCUTS See calculations on your Lock Screen and Dynamic Island. Calculate, convert, and tip from Spotlight or Siri without opening the app. NOTEBOOK AI compose actions, PencilKit handwriting recognition, undo for AI clean-up, .arixnote import/export, and Apple Writing Tools support. HISTORY & SCRATCHPAD 14-day activity charts, bookmarks, labels, editable calculations with automatic cascade recomputation. Save named values to the scratchpad for quick recall. 7 THEMES Paper, Pop, Cyberpunk, Terminal, Brutalist, Memphis, and Blueprint. ACCURACY & ACCESSIBILITY Full Reduce Motion support across all tabs. Improved VoiceOver. Hardened expression evaluator against edge-case overflows. Improved matrix precision with relative tolerances. Fixed converter race conditions. Strict concurrency safety across the entire codebase.

**VISUAL MATH — SEE THE WORK** Every formula now renders with proper math typography — fractions with horizontal bars, superscripts, square root radicals, and serif notation. Step-by-step derivations automatically highlight what changed between each step in your theme's accent color. Play through solutions with animated step controls or tap prev/next at your own pace. Step type badges (formula, substitution, simplification, result) make it easy to follow along. **CATEGORY DIAGRAMS** Geometry calculators display labeled shape diagrams alongside results. Finance calculators show interactive growth timelines with year markers and balance curves. Matrix operations render visual grids with bracket notation and highlighted pivot elements. **214 FORMULA CALCULATORS** Finance, fitness, chemistry, physics, geometry, statistics, tax, engineering, and more — each with "See the Math" step-by-step derivations, rich typography, and visual diagrams where applicable. **KNOWLEDGE CENTER** In-app documentation hub covering all 14 modules with searchable guides — from calculator basics to graphing, step solver, matrix, programmer mode, converters, and more. **APPLE INTELLIGENCE** Ask Arix anything in plain English — "what's 18% of $240 split 4 ways" — and get instant answers powered entirely on-device. AI explains calculations, scans receipts, and cleans up notebook entries. Your math never leaves your phone. **3D SURFACE PLOTTING** Visualize equations as 3D surfaces with SceneKit rendering, rotation, zoom, and wireframe toggle. Built into the graphing tab alongside 2D Cartesian, polar, parametric, and implicit plotting. **RPN MODE** Full reverse-polish-notation calculator with visual four-register stack (X, Y, Z, T), stack depth indicator, and all scientific functions. **iMESSAGE CALCULATOR & KEYBOARD** Do quick math inside Messages or any app. Tap Send to share as a rich bubble, or tap Insert to drop results into any text field. **EQUATION & RECEIPT SCANNER** Point your camera at handwritten or printed equations — Arix reads them instantly using on-device Vision OCR. Scan receipts and tap any detected number to pull it into your calculation. **VOICE INPUT** Say "twenty percent of one fifty" and Arix converts your words into math. Fully on-device. **LIVE ACTIVITIES & SIRI SHORTCUTS** See calculations on your Lock Screen and Dynamic Island. Calculate, convert, and tip from Spotlight or Siri without opening the app. **NOTEBOOK** AI compose actions, PencilKit handwriting recognition, undo for AI clean-up, .arixnote import/export, and Apple Writing Tools support. **HISTORY & SCRATCHPAD** 14-day activity charts, bookmarks, labels, editable calculations with automatic cascade recomputation. Save named values to the scratchpad for quick recall. **7 THEMES** Paper, Pop, Cyberpunk, Terminal, Brutalist, Memphis, and Blueprint. **ACCURACY & ACCESSIBILITY** Full Reduce Motion support across all tabs. Improved VoiceOver. Fixed gradian conversion, singular matrix determinants, and division-by-zero edge cases. Strict concurrency safety across the entire codebase.

**Arix 2.0** is a ground-up overhaul — 100+ improvements across every surface. **Step Solver — works on every device** The equation solver no longer requires Apple Intelligence. A built-in algebra engine solves linear equations, quadratics, and systems of equations instantly with verified, step-by-step solutions on any iPhone. On devices with Apple Intelligence, it remains the first choice with local solving as a seamless fallback. **Smarter search** The calculator directory now features fuzzy search with typo tolerance, acronym matching, and relevance ranking. Type "rpc" to find Rental Property Calculator, or "mortage" and still land on Mortgage. **214 calculators, all more reliable** - Sales Tax and Income Tax calculators join the directory - Division-by-zero and edge-case guards added across dozens of financial, math, and geometry calculators - Mortgage Payoff, Auto Lease, APR, Credit Card Payoff, and Margin calculators all handle boundary inputs gracefully instead of showing errors - Fixed Root Calculator for negative bases with odd roots - Corrected Ohm's Law, Planck's constant, and House Affordability blurbs **Smarter math engine** - Pi (π) and Euler's number (e) work properly in graphing expressions - Percent (%) operator now works correctly in all expressions - Power/exponent parsing rewritten for reliability with nested parentheses - Factor finder is dramatically faster on large numbers - Factorial handles values up to 170 without crashing - Matrix determinant no longer crashes on singular matrices - Notebook supports multiple documents with a document picker - Converter has a ± button for negative values and shows currency freshness in real time **More reliable** - Calculation history saves immediately — no more lost results - Decimal places setting respected everywhere - Spotlight search opens directly to your result - Widget shows a helpful prompt on fresh installs instead of a blank screen - Currency rates switched to a more reliable public data source - Graph colors now persist correctly across sessions - Stale results cleared automatically when changing matrix or number base inputs - iCloud sync available on Mac with a restart prompt when toggled **Cleaner navigation & design** - Back button removed — the hamburger menu is now the single, consistent way to navigate - Smoother tab switching with smarter memory management — no more flickering or lost state - Keyboard auto-dismisses when opening the menu - Zero-height layout flash on the calculator display eliminated - Graphing pinch-to-zoom and pan gestures no longer conflict - Scientific toggle accessible in landscape mode - Seven themes, all polished with proper success-state colors **Accessibility** - VoiceOver escape gestures on every page for easy back-navigation - Navigation menu is properly labeled for screen readers - Dynamic text sizes throughout

A privacy and reliability follow-up to 1.75. PRIVACY • Spotlight search of your calculations is now opt-in (off by default). Even when on, only the result is indexed — never the expression — so private math like "salary × 0.7" stays out of system search. • Deep-link handler now validates host and path; only the URLs Arix actually owns will route into the app. • Apple's required Privacy Manifest is included. CORRECTNESS • Mortgage payoff "interest saved" now reflects real total-payment differences. The earlier formula could under-report savings significantly when extra payments were involved. • APR solver flags non-convergence instead of returning a confidently-wrong rate. • pH and Henderson–Hasselbalch show "—" for invalid concentrations rather than a misleading literal pH of 0. • Singular matrices throw the right error from the determinant function. • Heat index and dew point are now bounded to their valid input domains; results outside that range show "—" with the constraint stated in the description. • Clearing your tax region in Settings now also clears the rate (was leaving the previous region's rate stuck). • Age calculator clamps to 0 instead of going negative for future birth years. ACCESSIBILITY • Calculation history results round-trip correctly in every locale (a comma-stripping bug previously turned 1,5 into 15 on devices set to German, French, etc.). • VoiceOver now reads scientific buttons the way a human would: "sine" instead of "sin", "x squared" instead of "x 2", "factorial" instead of "x exclamation". • The widget speaks its current contents to VoiceOver users with a clear synthesized phrase. WIDGET • Renders in your chosen Arix theme (Pop, Cyberpunk, Terminal, Brutalist, Memphis, Blueprint, or Paper). • Reads its data from a single atomic snapshot — the widget can no longer briefly show one calculation's expression with a different calculation's result. UX & POLISH • Pin and unpin produce different haptics so you can feel the difference. • Currency converter shows when rates were last refreshed and refreshes automatically when you reopen the app. • Number scanner correctly handles negative values; smart bill scanner now picks the largest line item instead of mashing every digit into one number. • AskArix and "Explain" streams cancel cleanly when you dismiss the sheet — no more updates landing on a dismissed view. • Step Solver has a Cancel button while solving, and the solve task is now properly cancellable. • Notebook handwriting OCR results are bounded so a multi-page sweep can't flood the evaluator. • Number scanner: only flips the sign when actual digits were scanned (a stray dash from "May-24" used to silently negate the displayed value). UNDER THE HOOD • JavaScript-based expression evaluator is now serialized — concurrent calculations across the main app, intent extension, and history recompute can no longer corrupt each other. • AI tools (Calculate, Convert, Save to Scratchpad, Search History) now bound their inputs. • AI conversations are LRU-capped (max 8 sessions) so long usage doesn't grow memory unbounded. • Notebook variable substitution caches its regexes per scope. • Replaced a deprecated Accelerate/LAPACK call with a hand-rolled LU decomposition — same correctness, no deprecation warnings. Thanks for the reports. Keep them coming.

Reliability, accuracy, and accessibility — a deep polish pass. • Mortgage payoff savings now use the correct math: "interest saved" is computed from the actual difference in total payments, not an approximation. Older versions could under-report savings by 20–50%. • APR solver detects and reports non-convergence instead of returning a confidently-wrong rate. • pH and Henderson–Hasselbalch show "—" for invalid concentrations instead of a misleading pH of 0. • Calculators in the Programmer tab now correctly throw "singular" on uninvertible matrices (LU error check fixed). • Scientific buttons are properly spoken by VoiceOver — "sin" reads as "sine," "x²" as "x squared," and so on. • Currency converter shows when rates were last updated, refreshes automatically when you reopen the app, and uses exponential backoff on outages. • Number scanner now picks up negative values; bill scanner extracts the largest line item instead of mashing every digit together. • Calculation history results round-trip correctly in every locale (a comma-stripping bug previously turned 1,5 into 15 on German devices). • Widget renders in your chosen theme. • Streaming AI explanations cancel cleanly when you dismiss a sheet; sessions are LRU-capped to keep memory steady on long runs. • Stale Spotlight entries are removed when you swipe-delete a calculation. • Apple's required Privacy Manifest is included. Plus dozens of smaller fixes: factorial of non-integers, division-by-zero guards in the lens equation and mortgage formulas with rate=0, currency-formatting crash on locales without a currency code, theme overlay GPU overdraw, and more.