SpareDesk
Your ledger room and estimation book, now in your pocket — an OTP-protected ledger app and a quotation builder that runs on your phone, works offline, and keeps your data yours.
The problem
Ledgers lived in paper books that got lost or torn, so nobody could answer “who owes me what?” without digging through a register. Handwritten quotations were slow to turn around, and statements were shared as awkward screenshots. There was no single view of outstanding payments across locations, and reconciliation was a manual, error-prone job.
What we built
We rebuilt the whole workflow as two installable PWAs with one shared design system. Ledgr keeps every book behind an OTP, splits dues into ageing buckets for an at-a-glance picture, and fires a branded A5 statement by SMS or WhatsApp in one tap — plus a visit-day planner so you call on the clients who actually owe you. Quotio composes GST-ready estimates on the client's real A5 letterhead, pulls prices from a product master, and shares them as auto-numbered quotes with a rich WhatsApp card and PDF. Bulk statements and reminders go out with zero SMS bill by turning a spare Android phone into the gateway — tested end-to-end in the field. The backend runs FastAPI + PostgreSQL, and the apps install and run offline where the business actually works.
PWAs delivered
SMS verified
API milestones
Every business tools brief we write starts plain: the problem, the plan, and the outcome we're accountable for.