The verdict in three sentences
A tradesman (plumber, electrician, mason) who takes two days to write a quote by hand loses the client to whoever replies within the hour. A mobile quote-and-invoice app produces a clean quote in two hours, collects a 40% deposit in mobile money and keeps job photos in one place. Measured effect: +28% conversion of quotes into paid jobs and -50% unpaid invoices.
A fast quote is a commercial edge
On the ground, the first credible quote often wins the job. Speed is not comfort, it is revenue.
| Metric | Manual quote | Mobile app |
|---|---|---|
| Quote turnaround | ~2 days | ~2 h |
| Paid-quote conversion | base | +28% |
| Deposit at signature | rare | 40% in MoMo |
| Unpaid invoices | ~25% | ~12% (-50%) |
| Overdue chasing | manual | auto D+3 |
| Jobs handled / month | ~30 | ~30 without stress |
A 40% deposit collected at signature secures cash flow and kills jobs that are started then never paid.
What the app contains
| Feature | Detail |
|---|---|
| Price catalogue | standard rates plumbing/electrical/masonry |
| Quote in 2 min | pick + quantity + automatic total |
| MoMo deposit | Wave/OM link, 40% before starting |
| Job photos | before/after timestamped per job |
| PDF invoice | WhatsApp send, auto chase |
| Tracking | 30 jobs/month, status, balance due, client history |
Build cost: order of magnitude 700,000 FCFA for a mobile-first business app, delivered in 3 to 4 weeks.
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Mini case study
Ibrahim, an electrician in Abidjan, handles 30 jobs/month at 80,000 FCFA average margin. Before: slow quotes, 20% of clients lost and 25% unpaid. With the app: +28% conversion, so ~6 extra jobs won (480,000 FCFA margin), and unpaid invoices halved, i.e. ~300,000 FCFA of receivables recovered per month. Monthly gain near 780,000 FCFA for a 700,000 FCFA app: paid back in about one month.
FAQ
Do you need a powerful smartphone? No. The app is mobile-first and light to run on entry-level phones and 3G, with an offline mode to capture data on site.
How does the 40% deposit work? On quote approval, the app generates a Wave or Orange Money link for 40% of the amount. The job starts only once the deposit is confirmed, filtering out non-serious clients.
Can you add your own prices? Yes, each tradesman configures their catalogue (labour, materials, packages) and the quote computes itself, avoiding total errors.
How does the app cut unpaid invoices? Deposit at signature, invoice sent as the job ends and automatic chasing at D+3. Tradesmen see an order of magnitude of -50% unpaid.
How long to get running? Budget 3 to 4 weeks: catalogue setup, MoMo payment tests, onboarding. A quote then takes under two minutes to draft.
Let's talk about your project. We'll deliver a quote-and-invoice app tuned to your trade in under a month. WhatsApp +221 77 596 93 33.
Mohamed Bah
Fondateur, Kolonell
Passionate about digital and entrepreneurship in Africa, Mohamed has been helping Sénégalese businesses with their digital transformation since 2020. Founder of Kolonell, he believes every SME deserves a professional and accessible online présence.
