Notes from building our own games, apps and tools: how they work, planning, maps and money. By the team behind Momusa.https://vedratic.com/enhttps://vedratic.com/blog/a-runway-is-one-line-and-two-fractions/https://vedratic.com/blog/a-runway-is-one-line-and-two-fractions/How Chronotopia stores a runway's whole history as one centreline with dated phases, grows it smoothly between them, and hatches the part that is only planned.Tue, 13 Oct 2026 00:00:00 GMTFrancisco Muñoz CuevasPlaces & historyhttps://vedratic.com/blog/categorising-bank-transactions-without-a-server/https://vedratic.com/blog/categorising-bank-transactions-without-a-server/How Ahorreo categorises every imported transaction with a fixed order of rules on your device, says who decided each one, and never undoes your corrections.Sun, 11 Oct 2026 00:00:00 GMTJoel Sala RamosMoney & privacyhttps://vedratic.com/blog/dating-airport-buildings-from-old-aerial-photos/https://vedratic.com/blog/dating-airport-buildings-from-old-aerial-photos/How Chronotopia gives a year to thousands of buildings, aprons and taxiways that no document dates: aerial photos, the gaps between them, and what ≈ really means.Thu, 08 Oct 2026 00:00:00 GMTJoel Sala RamosPlaces & historyhttps://vedratic.com/blog/type-to-answer-in-six-languages/https://vedratic.com/blog/type-to-answer-in-six-languages/Globdrop's interface speaks six languages but its flag names only three. How normalisation, fallbacks and autocomplete behave in Chinese, Arabic and Japanese.Tue, 06 Oct 2026 00:00:00 GMTFrancisco Muñoz CuevasBuilding softwarehttps://vedratic.com/blog/laying-an-airport-on-real-ground-with-the-ign-terrain-model/https://vedratic.com/blog/laying-an-airport-on-real-ground-with-the-ign-terrain-model/How Chronotopia turns Spain's 25 m terrain model into ground under El Prat and Ibiza: a levelled platform, a coast that meets the map, and buildings standing on it.Sun, 04 Oct 2026 00:00:00 GMTFrancisco Muñoz CuevasPlaces & historyhttps://vedratic.com/blog/introducing-airport-timeline-el-prat-and-ibiza-year-by-year/https://vedratic.com/blog/introducing-airport-timeline-el-prat-and-ibiza-year-by-year/Chronotopia rebuilds Barcelona–El Prat from 1916 and Ibiza from 1936 in 3D, one year at a time, with a source behind every event. What it shows and what it can't.Sun, 27 Sep 2026 00:00:00 GMTJoel Sala RamosPlaces & historyhttps://vedratic.com/blog/privacy-you-can-test-how-ahorreo-enforces-zero-network-calls/https://vedratic.com/blog/privacy-you-can-test-how-ahorreo-enforces-zero-network-calls/A privacy policy is a promise. A Content Security Policy, an automated network test and an opt-in switch are enforcement. How Ahorreo makes 'your data never leaves your device' something you can verify.Wed, 23 Sep 2026 00:00:00 GMTFrancisco Muñoz CuevasMoney & privacyhttps://vedratic.com/blog/booking-date-vs-accrual-period-when-did-you-really-earn-it/https://vedratic.com/blog/booking-date-vs-accrual-period-when-did-you-really-earn-it/A salary paid on March 1st belongs to February, and a card purchase on March 28th is March spending even if it's charged in April. How Ahorreo separates the bank's date from the month a transaction belongs to.Wed, 16 Sep 2026 00:00:00 GMTFrancisco Muñoz CuevasMoney & privacyhttps://vedratic.com/blog/household-or-my-share-measuring-net-worth-with-shared-accounts/https://vedratic.com/blog/household-or-my-share-measuring-net-worth-with-shared-accounts/A joint account at 50% shouldn't count in full towards your net worth. How Ahorreo models ownership as a percentage on accounts, homes and mortgages — and why every figure needs to say which base it's on.Thu, 10 Sep 2026 00:00:00 GMTJoel Sala RamosMoney & privacyhttps://vedratic.com/blog/why-money-should-never-be-a-float/https://vedratic.com/blog/why-money-should-never-be-a-float/0.1 + 0.2 is not 0.3 in JavaScript. Here's why Ahorreo stores every amount as integer minor units inside a Money type, refuses to add two currencies, and parses '1.234,56 €' without guessing.Fri, 04 Sep 2026 00:00:00 GMTFrancisco Muñoz CuevasMoney & privacyhttps://vedratic.com/blog/introducing-ahorreo-personal-finance-that-never-leaves-your-browser/https://vedratic.com/blog/introducing-ahorreo-personal-finance-that-never-leaves-your-browser/Meet Ahorreo, Vedratic's local-first personal finance app. Import the statements your bank already gives you and see what you earn, spend and own — with no server, no account and no bank credentials.Sat, 29 Aug 2026 00:00:00 GMTJoel Sala RamosMoney & privacyhttps://vedratic.com/blog/60fps-on-a-budget-optimizing-svg-games-and-gantt-charts/https://vedratic.com/blog/60fps-on-a-budget-optimizing-svg-games-and-gantt-charts/Globdrop draws one image and two pins; Andamio re-renders its whole Gantt chart on each drag move. What the code does, what we counted, what we still owe.Sat, 22 Aug 2026 00:00:00 GMTFrancisco Muñoz CuevasBuilding softwarehttps://vedratic.com/blog/why-globdrop-doesnt-use-dymaxion/https://vedratic.com/blog/why-globdrop-doesnt-use-dymaxion/Fuller's Dymaxion map distorts area far less than Mercator. Why it still doesn't fit Globdrop: north-up maps, scores in km, distance on a flat image, cut faces.Tue, 28 Jul 2026 00:00:00 GMTJoel Sala RamosMaps & geographyhttps://vedratic.com/blog/the-art-of-vexillology-curating-globdrops-diverse-flag-scenarios/https://vedratic.com/blog/the-art-of-vexillology-curating-globdrops-diverse-flag-scenarios/Go behind the scenes of how we selected, grouped, and curated the four flag scenarios in Globdrop, from autonomous regions to special design anomalies.Sun, 19 Jul 2026 00:00:00 GMTJoel Sala RamosMaps & geographyhttps://vedratic.com/blog/decoding-symbols-the-science-of-visual-recognition-in-globdrops-flag-mode/https://vedratic.com/blog/decoding-symbols-the-science-of-visual-recognition-in-globdrops-flag-mode/What happens when you type a flag's name in Globdrop: the suggestion list, the text normalisation, and the answers it accepts and the ones it rejects.Sun, 12 Jul 2026 00:00:00 GMTFrancisco Muñoz CuevasBuilding softwarehttps://vedratic.com/blog/introducing-flag-mode-a-new-way-to-explore-globdrop/https://vedratic.com/blog/introducing-flag-mode-a-new-way-to-explore-globdrop/We are excited to launch Flag Mode in Globdrop! Learn how the new mode works, how to play it, and the different flag scenarios and difficulty options available.Thu, 02 Jul 2026 00:00:00 GMTJoel Sala RamosMaps & geographyhttps://vedratic.com/blog/localstorage-vs-cloud-why-privacy-matters-in-project-tools/https://vedratic.com/blog/localstorage-vs-cloud-why-privacy-matters-in-project-tools/Why Andamio stores plans in localStorage and Ahorreo uses IndexedDB: size limits, sync vs async, clearing site data, and a JSON export vs an encrypted backup.Mon, 15 Jun 2026 00:00:00 GMTFrancisco Muñoz CuevasBuilding softwarehttps://vedratic.com/blog/building-privacy-first-project-manager/https://vedratic.com/blog/building-privacy-first-project-manager/Inside Andamio: a flat task list, a scheduler that repeats until nothing moves, three views, Mermaid import and export, and plans kept in localStorage.Mon, 08 Jun 2026 00:00:00 GMTFrancisco Muñoz CuevasBuilding softwarehttps://vedratic.com/blog/why-your-project-needs-buffer-time-built-in/https://vedratic.com/blog/why-your-project-needs-buffer-time-built-in/How buffers work in Andamio (a days field per task) and in our buffer calculator (PERT plus root sum of squares), and why neither is Critical Chain's 50% rule.Fri, 29 May 2026 00:00:00 GMTJoel Sala RamosBuilding softwarehttps://vedratic.com/blog/top-10-most-challenging-geographic-trivia-questions/https://vedratic.com/blog/top-10-most-challenging-geographic-trivia-questions/Reno is west of Los Angeles, Windsor is south of Detroit and Maine is the US state closest to Africa. Why memory gets them wrong, and where Globdrop tests them.Thu, 21 May 2026 00:00:00 GMTJoel Sala RamosMaps & geographyhttps://vedratic.com/blog/designing-globdrops-feedback-loop/https://vedratic.com/blog/designing-globdrops-feedback-loop/What Globdrop shows after each click, and why: two pins, a dashed error line, the distance, a threshold per map and a time multiplier, for survey knowledge.Sat, 25 Apr 2026 00:00:00 GMTJoel Sala RamosMaps & geographyhttps://vedratic.com/blog/how-to-calculate-the-critical-path-in-software-development/https://vedratic.com/blog/how-to-calculate-the-critical-path-in-software-development/The critical path method step by step (forward pass, backward pass, slack), then what Andamio calculates: the forward pass, with finish-to-start links only.Wed, 01 Apr 2026 00:00:00 GMTJoel Sala RamosBuilding softwarehttps://vedratic.com/blog/new-one-piece-map-globdrop/https://vedratic.com/blog/new-one-piece-map-globdrop/How we calibrated a map with no real coordinates: the Linear system, a 1242×848 px bounding box, a 3,000-mile width, a 200-mile threshold and 26 islands.Sun, 22 Mar 2026 00:00:00 GMTJoel Sala RamosMaps & geographyhttps://vedratic.com/blog/the-fallacy-of-multitasking-in-project-planning/https://vedratic.com/blog/the-fallacy-of-multitasking-in-project-planning/Three projects at 33% each finish later than the same three done one after another. The arithmetic of partial dedication, and how to plan it in Andamio.Thu, 26 Feb 2026 00:00:00 GMTJoel Sala RamosBuilding softwarehttps://vedratic.com/blog/building-globdrop-tech-stack-showcase/https://vedratic.com/blog/building-globdrop-tech-stack-showcase/Inside Globdrop: scenarios as JSON, six coordinate systems in one file, a map that is a plain image with pins, and the sizes we measured from the build.Fri, 30 Jan 2026 00:00:00 GMTFrancisco Muñoz CuevasBuilding softwarehttps://vedratic.com/blog/how-to-build-scalable-svg-maps-for-the-web/https://vedratic.com/blog/how-to-build-scalable-svg-maps-for-the-web/Where Globdrop's base maps come from, how we calibrate them in a small in-house tool, how a click becomes a latitude, and why we use one image, not paths.Tue, 13 Jan 2026 00:00:00 GMTFrancisco Muñoz CuevasBuilding softwarehttps://vedratic.com/blog/client-communication-using-gantt-charts-to-set-realistic-expectations/https://vedratic.com/blog/client-communication-using-gantt-charts-to-set-realistic-expectations/Showing a plan to a client with Andamio: their tasks as dependencies, deliverables with target dates, review time added to effort, and SVG export.Wed, 10 Dec 2025 00:00:00 GMTJoel Sala RamosBuilding softwarehttps://vedratic.com/blog/the-mathematics-of-map-projections/https://vedratic.com/blog/the-mathematics-of-map-projections/Why no flat map is exact, and the forward and inverse formulas Globdrop uses: Mercator, Miller, Lambert azimuthal, Albers, UTM and a flat grid for fiction.Sun, 23 Nov 2025 00:00:00 GMTFrancisco Muñoz CuevasMaps & geographyhttps://vedratic.com/blog/why-the-mercator-projection-distorts-our-worldview/https://vedratic.com/blog/why-the-mercator-projection-distorts-our-worldview/Why Greenland looks as big as Africa on a Mercator map: area grows as sec²φ, 4× at 60° and about 10.5× at 72°. And why Globdrop's world map uses Miller.Fri, 03 Oct 2025 00:00:00 GMTJoel Sala RamosMaps & geography