What shipped, and when

Plans that match how people actually use the labs.

• NewPro moved to a subscription: $6 per month or $58 per year, covering every released lab, the full lesson catalog, and paid export features.
• NewFounder was added as a $99 one-time option while available. Classroom seats were announced at $4 per seat with a 20-seat minimum; the later rollout moved to separately confirmed preview availability rather than a default checkout offer.
• ImprovedPreviously purchased one-time tiers keep their access — no new subscription is required to retain what was already bought.

Pricing, simplified down to a decision anyone can make in ten seconds.

• NewLogic Lab pricing collapsed to two tiers: Free and Pro ($32 one time). Pro unlocked every component and the full SimCast library, with no upgrade ladder.

A pricing model you buy once, and a marketing site that loads like one.

• NewOne-time purchase pricing introduced across four tiers: Free, Fundamental, Professional and Max.
• NewAcademic discount applied automatically at checkout for institutional email addresses.
• ImprovedLanding page now lazy-loads below-the-fold sections and defers non-critical assets.
• ImprovedStructured data (JSON-LD) added to every public page.
• ImprovedPricing cards rebuilt so tier differences are readable at a glance.
• FixedMobile navigation no longer stays open after a route change.
• FixedIntermittent 404s on generated circuit template pages resolved.

Lessons that build the circuit for you, and docs that let you poke at it.

• NewSimCast lesson player: guided, step-by-step walkthroughs that place and wire components as they explain them.
• NewComponent documentation pages with live examples and truth tables.
• ImprovedLogic Lab local saving moved to debounced IndexedDB writes so its browser-local work persisted between sessions without a manual save step.
• ImprovedLogic Lab undo history was reported as 200 steps in this release; current undo and redo depth is lab-specific and is not published as one cross-platform numeric guarantee.
• ImprovedRebindable keyboard shortcuts were announced in this release; current shortcuts and configurability are lab-specific and shown in each workspace.
• FixedOscilloscope no longer renders waveform artifacts at high zoom.
• FixedWire routing corrected for complex multi-layer circuits.

More circuits to start from, and faster handling of large ones.

• NewTemplate library expanded across combinational, sequential and arithmetic categories.
• NewFeatured circuits on the landing page, with interactive previews.
• Improved.digi export and import reworked into a single predictable flow.
• ImprovedTemplate URLs now use descriptive slugs.
• ImprovedNoticeably better performance past 500 components.
• FixedTiming-diagram export no longer exports at the wrong scale on high-DPI displays.
• FixedPasted components keep their custom labels.

DigiSim becomes available end to end in five languages.

• NewFull translations for English, Spanish, Japanese, Korean and Simplified Chinese.
• NewLanguage switcher in the navigation bar, with locale detection on first visit.
• NewMarketing site localized too — landing, pricing, and documentation included.
• ImprovedAll static copy moved into the i18n framework, so translations can be contributed rather than patched.
• Improvedhreflang and alternate URLs added for international search.
• FixedExported filenames no longer mangle CJK characters.
• FixedRight-to-left text aligns correctly in component property panels.

Documentation you can run, not just read.

• NewFull documentation system with a guide for every component.
• NewInteractive circuit previews embedded directly in the docs.
• NewQuick-start tutorial series covering basic through intermediate circuits.
• ImprovedComponent search gained fuzzy matching and category filters.
• ImprovedSmoother canvas zoom and pan on touch devices.
• FixedComponent tooltips no longer overflow narrow viewports.
• FixedMemory leak fixed when switching rapidly between large circuits.

A new engine, a new workspace, and roughly ten times the headroom.

• NewSimulation engine rewritten from scratch — around 10× faster propagation on complex circuits.
• NewInterface redesigned: dark theme, resizable panels, tabbed workspace.
• NewLogic Lab added local circuit storage with autosave and crash recovery.
• NewMulti-tab workspace, one independent simulator instance per tab.
• ImprovedNew wire renderer with automatic orthogonal routing.
• ImprovedComponent palette rebuilt around drag-and-drop, favorites, and recents.
• FixedDozens of stability issues inherited from the 1.x architecture cleared out.

Memory, an ALU, and enough of a CPU to run a program.

• NewRAM, ROM and a configurable ALU with selectable operations.
• NewAssembly program loader — write a program and execute it on a simulated processor.
• NewBus component for grouping multi-bit signals.
• ImprovedLibrary extended with tri-state buffers, decoders and priority encoders.
• ImprovedTiming-diagram panel added for reading waveforms during simulation.
• FixedFlip-flops now respect setup and hold constraints.

The first public build: a canvas, the seven gates, and something to look at.

• NewInitial public release of DigiSim as a browser-based circuit simulator and learning platform.
• NewCore gates — AND, OR, NOT, NAND, NOR, XOR, XNOR — with configurable input counts.
• NewI/O components: switches, push buttons, LEDs, seven-segment displays and clock generators.
• NewCanvas editor with grid snapping, zoom and a minimap.
• NewJSON circuit export and import for local backup and sharing.
• ImprovedResponsive layout across desktop, tablet and mobile.
• FixedSimulation loop stabilized against race conditions in feedback circuits.