hackFatura¶
The first product built by Absolutely Plausible — a zero-cost field management system for traveling mechanics. Originally deployed for PCJ; now retired and replaced by AP Ops.
Status — May 2026¶
- Working v1 exists and ran in production through the PCJ relationship (2022–early 2026).
- No active development. The PCJ deployment is over, and hackFatura is not an active product track.
- Repository is private (
github.com/wmestrinho/hackFatura) for archival/reference purposes. - Direction decided: useful patterns are absorbed into AP Ops; standalone product work is retired.
What it does¶
Full trackside field management designed for the realities of mobile motorsport service:
- New Customer registration
- Invoice Builder — client-side PDF generation, brand-customizable, works offline
- Table Work — event-based service logging (alignment, tuning, etc.)
- Parts Work — parts inventory and tracking per kart
- Work Costs — expense tracking per event
- Dashboard — event summary: revenue, costs, invoices pending
Built for a real working environment: rain, slow data connections, dirty hands, fast turnarounds. Not a generic POS.
Stack¶
| Layer | Tech | Why |
|---|---|---|
| Frontend | Static HTML / CSS / JS (modular) | Works offline, fast on slow connections |
| Backend | Google Apps Script (deployed as Web App) | Free, no server to maintain |
| Database | Google Sheets | Free, owner has full control of data |
| PDF generation | jsPDF — client-side | Works without backend reachable |
| Hosting | GitHub Pages via CI/CD | Free, auto-deploys on push |
Zero monthly cost. No paid services. No subscriptions. Owner keeps their own data in their own Google Drive.
Why it was built¶
Most "shop management" SaaS is built for stationary shops with reliable WiFi. Trackside reality is the opposite: spotty connection, customer demands a paper invoice in the next ten minutes, parts have to be tracked across multiple karts at different events. hackFatura was built from inside that reality.
Product direction — Decision made¶
As of May 2026, the decision has been made to retire hackFatura as a standalone product and replace it with AP Ops as Absolutely Plausible's internal operations & invoicing tool.
The hackFatura architecture (Google Apps Script + Google Sheets + static frontend) lives on in AP Ops, which has been reworked to a Client → Project model better suited for AP's Operations Partner engagements.
All future development will focus on AP Ops as the internal tool for managing client work, expenses, and invoices.
Repo¶
github.com/wmestrinho/hackFatura — private.
Made private during the May 2026 cleanup because the existing v1 contains specifics tied to its original PCJ deployment (pricing tables, contact info). Any future public release would happen from a cleaned fork.
Demo subdomain¶
hackFatura no longer claims mech.robotfantome.com — that subdomain has been retired. AP Ops (Absolutely Plausible's own operations & invoicing app, absolutely-plausible-ops, itself derived from the hackFatura foundation) now lives at ops.absolutelyplausible.com. If hackFatura ever needs a public demo, it gets a fresh subdomain decided at that time.
hackFatura is historical reference now. Treat AP Ops as the active internal operations product.