Changelog

Click a field to drop contours, streamlines, and critical points; paste formulas straight from Excel or Wolfram Alpha; plus a round of sharing, sliding, and rendering fixes.

• Engine Paste straight from Excel or Wolfram Alpha: curly-brace lists like {1,2,3}, fn[…] calls, Excel text functions, and systems of equations (“solve x+y=10, x-y=2”) all evaluate now.

• Graphs Field visualization: drop contours, streamlines, points, critical points, and cross-sections onto any field or vector field, plus a ∇ connector that turns one into its gradient, divergence, curl, or Laplacian.

  

• Graphs Graph drags are smooth again, no more stepping mid-drag, and Dashboard renders surface, field, and vector-field charts the same way calc view does.

• Sharing A round of sharing fixes: desktop share opens the right menu for your pointer type, the share-menu popover no longer detaches from its button, and an embed link always points at the same calc as its share link.

• Perf Typing feels sharper: per-keystroke traffic between the engine and the UI is down 65–99%.

• UI Auto-generated labels (Age, Current weight, …) are sentence-case everywhere now, not just in Present mode; the unit picker shows short abbreviations like km/h instead of the full name.

• Fixes Fixed: a content flash on cold-loading present mode, dark-mode LaTeX result color and an overlapping algebraic-form row, a slider that could flip a value’s sign or run away mid-drag, drag-to-solve’s false “grab me” underline, dropped “as X”/“in X” conversions on plain-English functions, and a tape-measure crash on non-finite values.

Edit links save more reliably, dragging to solve is legible, and the home page loads noticeably faster.

• Engine log(0) (and log2/log10 of zero) returns a clean −∞ instead of a garbled complex value; “days until <date>” also handles month names, weekday prefixes, and dot-separated dates.

• Graphs Dragging a slider on a plotted function now holds the y-axis steady instead of rescaling every frame.

• Sharing Edit links now save reliably: edits from a shared edit link write straight to the real calc, for everyone with access.

• Sharing Share menu cleaned up: an owner-only badge, recipients can re-share, and the edit-link popover no longer clips the URL.

• Perf ~40% less JS on the home page’s first load, and warm keystrokes about 20% faster.

• UI Grab-to-solve is legible: dragging a result to solve for it now shows a clear affordance, a highlighted knob, and rounds cleanly.

• UI “Where instacalc fits”: a new homepage diagram maps common tasks against other tools, showing where instacalc covers the whole list.

  

• Fixes Fixed stranded slider steppers, a phantom “my calc calc” save toast, a sliding breadcrumb on view switches, Text mode not mirroring prose rows, and a persistent Safari load error from a stale cache.

Present mode stops dropping values, 3D graphs render correctly again, and a Safari crash is gone.

• Graphs 3D surfaces for two-variable functions render correctly again, auto-orbit spins calmer, and a formula-link 404 flash is gone.

• UI Present mode no longer drops the value for natural-language rows like “10 mph for 4 hours”: it shows the computed result again.

• UI The present-mode hero unit (like BMI’s kg/m²) now stays inside its tile instead of overflowing.

• UI Explore’s subject pages now share the same breadcrumb header as the rest of the gallery.

• Fixes Fixed a Safari crash on load caused by a PDF-library race condition.

A quieter present mode, plus small typing and sharing fixes.

• UI Present mode restyled with flat-tile cards and serif reading type.

• UI Sharper docs typography: cleaner type on the help and learn pages.

• Fixes Prose typing fixed: sentences no longer trip on operator detection.

• Fixes Share links survive punctuation: semicolons and pipes in a row no longer break the link.

• Fixes Unit-mismatch warnings are more visible on the row.

Embed a live figure anywhere, and feel a ~3× faster engine.

• Sharing Embed a single live figure with /embed/?figure=, or paste a link into Notion or Slack and it unfurls automatically.

• Sharing Drag to back-solve: drag a result in a live embed and the driving input updates.

• Perf ~3× faster warm engine: slider drags on heavy calcs feel instant now.

• UI A live feature explorer on the homepage: click through what Instacalc can do.

  

• Fixes Clearer errors: broken rows say what went wrong and where.

A real editable spreadsheet inside a calc, and LaTeX that computes.

• Engine Data tables: @sheet turns a list into an editable spreadsheet: sort, reorder columns, totals, paste from Excel.

  

• Engine Symbolic LaTeX: \sum, \int, \frac{d}{dx}, \lim, and \binom now compute instead of parsing as literal algebra.

• Engine Prose rows render as Markdown, with {expr} filled in live.

• Engine Custom summary rows: add your own Total, Average, or weighted footers to a table.

• Graphs Charts from labeled data: piechart({hotel: 1, flight: 2, food: 3}) just works.

  

• UI Row styling editor redesigned as a side panel.

Present-mode values now read as fields you can edit, spreadsheet imports handle quoted numbers, and Explain stays out of your way.

• Engine Import real spreadsheets: CSV import now reads each column on its own, so quoted numbers from Google Sheets exports add up and average correctly.

• Engine Explain only when you ask: the step-by-step panel no longer pops open on every derivative; it opens for an explicit “explain” and stays tidy otherwise.

• Sharing Shared links preview better: gallery and shared calcs carry cleaner titles and descriptions when posted, and the homepage demo links to a real shared calc.

• UI Editable values look editable: in present mode, a number you can change now shows as a soft input field instead of a highlight, so it’s obvious what’s tappable.

• UI Avatar menu, unified: the account dropdown now uses the same menu as everything else, so it looks and behaves consistently.

• UI More mobile menus became bottom sheets: the unit picker, function picker, and convert panel now slide up as scrollable sheets on touch.

Present mode packs more in, plots take a formula directly, and a round of mobile, conversion, and tooltip bugs are gone.

• Engine Infinite sums fixed: p-series like the sum of 1/n⁴ now fold their coefficient into the closed form instead of dropping it.

• Graphs Plot a function inline: define f(x) and write plot(f) to drop a chart right beside the math, present mode included.

  

• UI Accessibility & polish pass: better color contrast, a real 404 and error page, and cleaner login and graph screens.

• Fixes Insert menu works on phones: the footer “Insert ▾” now opens as a bottom sheet you can actually scroll on touch, instead of a clipped desktop popover.

• Fixes Tooltips flip when they’re cramped: a hint with no room above now drops below the icon instead of covering it.

• Fixes Hex and octal conversions fixed: fromhex with letters like a–f now parses correctly instead of returning nothing.

A visual bar lets you style any row inline, and the engine learned spread syntax.

• Engine Spread syntax: build arrays and objects with “…”, like [...xs, y] and {...base, k: v}, exactly the way you would in code.

  

• UI Row styling bar: select a row to tag it as a heading, hero, or status and watch it restyle live, no decorator syntax to remember.

  

• UI One-tap new calc: the scratchpad tape header has a “+ New” pill that drops you into a fresh blank calc without losing the one you were on.

• Fixes “37M x $160” now multiplies: an “x” right before a currency amount reads as times, not a stray variable.

• Fixes Tap an active tab again: on mobile, tapping Calcs or Explore a second time always returns you to your calc.

• Fixes f = derivative(x^2, x) stays a real function you can call: the leading name is no longer dropped, so f(3) gives 6.

Goal-seek now handles real calculations: it reaches inputs buried under other formulas, works with spaced variable names, and updates live as you type.

• Engine Goal-seek now reaches inputs buried deep in your calculation: change a starting number even when your target is built from several layers of formulas.

  

• UI The answer updates live as you type the goal: there’s no button to press.

  

• UI Inputs start unlocked and free to change; click to lock the ones you want to hold fixed.

• Fixes Goal-seek supports variable names with spaces: names like “Total Project” now show up in the menu and solve correctly.

• Fixes Adding a goal-seek row no longer rewrites the references in your other formulas.

A new “Explain” panel reveals the steps behind calculus, limits, and transforms, not just the answer.

• Engine Explain panel: open “Explain” on a result to see worked, step-by-step reasoning, with a short “why” on each step.

  

• Engine Derivative steps: product and chain rule now expand into nested, collapsible steps you can follow line by line.

• Engine Limits, worked out: limits resolve with real steps, including why sin(x)/x → 1 without circular reasoning.

• Engine Transform steps: Laplace, Fourier, and inverse-Laplace show genuine derivations, not just a lookup table.

• Engine Smarter rate conversions: same-dimension rates like “minutes/week in hours/day” now convert correctly.

• Fixes Fixed an equation solver that returned the wrong root for some coefficient-times-x minus a constant.

Explore paints instantly, and the tally and unit engine got noticeably smarter.

• Engine Tally through conversions: keep a running total going with words too, like “in km” or “→ cm”, not just +, −, ×, ÷.

• Engine Math exam gallery: worked K-through-college exams with step-by-step tutorials and differential-equation support.

  

• Engine Better unit math: phrasing like “$3/L for 40 L”, variable denominators, and @-scaled rates now evaluate the way you read them.

  

• Graphs Reliable graph equations: the equation field now defaults to plain text, with the typeset math editor as an opt-in.

• Perf Explore loads instantly: gallery cards render on the server, so the page paints right away instead of waiting seconds.

• Fixes Custom embeds default to a light theme and no longer inherit the host page’s fonts.

Instacalc installs to your home screen and works offline, with a faster, steadier load.

• Engine Running tally: start a row with +, −, ×, or ÷ to continue from the previous answer.

  

• Graphs Radar charts now plot multiple data series on a single chart.

  

• Graphs Find roots without losing your graph: solving adds a roots table and keeps your plot intact.

  

• Sharing Richer link previews: shared data and formula links show rendered charts in their social previews.

• Perf Instant home: the calculator loads in about a second and no longer jumps around as it paints.

• Perf Install Instacalc: add it to your phone’s home screen or desktop; recent calcs and the gallery now work offline.

• Fixes Older iOS Safari support and a smoother update flow: new releases load without a hard refresh.

Jump anywhere with ⌘K, and hop between recent calcs with ⌘P.

• UI Command palette: press ⌘K to jump to any calc, action, or page from anywhere.

  

• UI Quick switch: press ⌘P to instantly hop between your recent calcs.

  

• UI What’s new: this changelog now lives in the info menu so you never miss an update.

Derivatives and integrals now solve symbolically and show their work.

• Engine Symbolic derivatives and integrals now render directly in calc rows.

  

• Engine Step-by-step worked solutions for calculus, with a new /showcase/calculus gallery of examples.

• Graphs Typeset math editor for graph equations.

  

A full graphing calculator and an equation solver, built right into the sheet: no modes, no buttons.

• Engine Equation solving: type 2x + 5 = 17 and get x = 6, with no solve button and no mode switch.

  

• Engine Function math: compose functions (f + 3), apply them bare (sin x), and reveal derivatives and integrals as math chips.

  

• Engine Typeset math: KaTeX rendering and the @formula decorator bring paper-style math to calc rows.

  

• Engine Per-row units: pick a unit per row, with a global metric/imperial preference.

  

• Engine Converter redesign: a diagonal-split panel, quick chips, a source-aware picker, and searchable conversions in the keypad.

  

• Graphs Graphing calculator: type any expression and it plots: curves, scatter points, polar r = f(θ), parametric (x(t), y(t)), and implicit conics like x² + y² = 25.

  

• Graphs Full-screen Graph mode: dedicated /graph pages with zoom, pan, sliders that drive the curve live, and click-to-solve.

  

• Graphs Auto-graphing for expressions like ax², 2x, and mx + b: the curve just appears.

  

• Sharing Gallery & discovery: 95+ curated formula calcs, a visual homepage gallery, and a universal command bar.

• Perf Faster: about 30% quicker cold sheets, and 67% on dependency chains.

• UI Mobile-first inputs: 44×44 touch steppers, unified slider pills, and calc-defined keypads.

• UI Unified shell: Calc, Present, and Graph views share one header, breadcrumb, and document column.

Live custom theming and a rebuilt mobile header.

• UI Reactive theme system: import and export theme strings and pick custom colors, applied live.

  

• UI Mobile header redesign: a single-row layout with an icon mode-switcher and a bottom bar.

• UI Present-mode navigation: move between editable parameters with arrow keys, and copy hero rows and results in a tap.

• UI Archive: an always-visible archive section, with an undo toast when you remove a calc.

Browse the community, present any calc cleanly, and load pages faster.

• Sharing Explore page: browse community calcs in card, compact, or list views.

• Sharing Present mode: share a calc in a clean, focused presentation view.

  

• Perf Faster page loads: panels and the search index load on demand, so the app paints sooner.

• Perf Quicker cold start: 10–40% faster first-calc parsing.

• UI Row decorators: visual pills that show a calc’s mode (finance, science, and more).

  

• UI Collapsible sidebar: a redesigned sidebar with an icon rail you can collapse to reclaim space.

• UI Built-in docs: help and learn docs now live inside the app instead of a separate site.

• UI Simpler top nav: streamlined down to Logo, Explore, and Learn.

• Fixes Calcy AI now handles multi-turn chat and reliably names and generates calcs.

• Fixes Fixed embed links that pointed at the wrong calc, and dropdowns that showed the wrong selected value.

Math inside comments, plus a round of typing and reliability fixes.

• Engine Comment math: expressions like {2 + 2} now compute inline inside a comment.

  

• Engine Forgiving typing: half-typed values in a collapsed row no longer error out mid-keystroke.

• UI Edit on mobile: leave presentation mode on a phone with a single tap.

• UI Font picker: pick and import fonts without the dropdown filtering itself away.

• Fixes Reliability: fixed a Safari caret jump, flaky keyboard shortcuts, and a login-sync gap that could lose a just-saved calc.

Dark mode, folders and drag-and-drop, and richer shared links.

• Engine Describe a calculator in plain English and have Calcy generate one for you, with a live preview.

• Engine Stock syntax: use $TICKER and share/shares to pull live quotes into a calc.

• Engine Currency tooltips now show the rate source and the date the rate was set.

• Sharing Rich link previews: shared calc links unfurl with a generated preview image on social media.

• UI Dark mode: switch between light and dark themes, with automatic system-preference detection.

  

• UI Folders & drag-and-drop: group calcs into folders and reorder rows and calcs by dragging.

• Fixes Comments that contain an = are no longer treated as calculations.

The first Present mode, with auto-formatted tables and one-tap save & remix.

• Sharing Present mode: show any calc as a clean, auto-formatted presentation with layout decorators.

• Sharing Tables and structured results now render automatically in Present mode.

• Sharing Save & remix: tap the heart on a shared calc to save your own copy to My Calcs.

• Fixes Older share links using the c= parameter and v=0.9 format open correctly again.