commit 90ca044 (HEAD → project)
Author: Mesha Vegas <meshavegas@gmail.com>
Date: Sep 2026 → now
project · ex
feat(kayer): Kayer — the till for Cameroonian micro-businesses
An offline-first Android app for small shops and workshops: sales, expenses, customer credit, production batches and stock, with receipts shared on WhatsApp.
$ git diff --stat package.json
8 technologies used
$ git log --oneline --grep=result
Result · impact
- ✓Sales, credit, production and stock flows working fully offline
- ✓Business rules tested on in-memory SQLite, with the same migrations as the app
- ✓Next step: field testing in Douala
$ cat README.md
Context
In Cameroon, the street food seller, the tailor or the corner shop keep their books in a notebook, if at all. Customer credit, raw-material stock and the day's real profit stay fuzzy. Kayer replaces that notebook with an app built for entry-level Android phones and no guaranteed connection.
What I did
A personal product, from the specification to an app tested on device:
- Offline entry: a sale in a few taps, free amount, sale on credit, expense, customer credit with reminders and partial payments.
- Production: batches, yield, losses and closing; raw-material purchases paid or on credit, stock with alert thresholds, supplier debts.
- Business profiles in JSON: the home screen adapts to a shop or a workshop.
- An architecture where the UI never reads the network: everything goes through encrypted SQLite (SQLCipher), and every business write records the row, the journal event and the daily aggregate in a single transaction.
- A money movement is never edited or deleted: a correction produces a traceable void. Amounts as integer FCFA.
- Numbered receipts with the business's logo, shared as a WhatsApp image, a PDF or printed.
- A 30-second launch video built in code (Remotion), voice-over and mix included.
$ ls screenshots/
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