The verdict in three sentences
On a construction site, whatever is not measured drifts: materials that vanish, mis-recorded workers, forgotten variations. A site management app centralises progress, material stock, attendance and field photos, then automatically feeds progress-based invoicing. The most tangible effect: budget overruns contained to within 10-20 %, often the entire margin of a small construction firm.
The line items that blow a budget
Leaks rarely come from one big item but from a sum of small untracked losses. The app makes each one visible.
| Item | Typical loss without tracking | With site app |
|---|---|---|
| Materials (cement, steel) | 5-12 % waste/theft | Stock in/out tracked |
| Worker attendance | Hours inflated 5-10 % | Geolocated clock-in |
| Client variations | Often unbilled | Logged and invoiced |
| Real progress | Estimated "by feel" | % per lot, live |
| Defect rework | Found too late | Timestamped photos |
| Progress invoicing | 2-4 weeks late | Generated in 1 tap |
The key point is the field → invoicing loop. The site foreman enters progress from a phone, and the office issues the matching progress claim with no re-keying and no omission.
What it costs in 2026
| Plan | 2026 price | Contents |
|---|---|---|
| SaaS Site | 29 900 FCFA/month | Tracking + attendance + photos, 1 active site |
| SaaS Pro | 59 900 FCFA/month | Multi-site + progress invoicing |
| Custom app Growth | 1 500 000 FCFA | Own brand, roles, accounting exports |
| Custom app Premium | 3 000 000 FCFA | Actual vs quoted cost, developer dashboards |
| Field team training | 150 000 FCFA | On site, 1 day |
| Monthly maintenance | 50 000-100 000 FCFA | Support + updates |
In Lagos or Nairobi, a developer uses the same tool with actual cost vs currency tracking (naira, shilling) and multi-currency reports; the orders of magnitude stay close at constant 2026 exchange rates.
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Mini case study
Fatou runs a small structural works firm in Dakar with 3 simultaneous sites totalling 180 000 000 FCFA of work/year. Historically her overruns hit ~12 %, i.e. 21 600 000 FCFA absorbed from her margin. Moving to the Pro app (59 900 FCFA/month = 718 800 FCFA/year) and tracking materials and attendance, she cuts overruns to ~5 %, i.e. 9 000 000 FCFA. Saving: 12 600 000 FCFA/year for a tool cost of 718 800 FCFA — a return above 17x.
FAQ
Does attendance work without constant internet? Yes, the app records offline and syncs as soon as the network returns. Ideal for sites in poorly covered areas.
How does the app curb material theft? Every stock movement is logged with quantity and responsible person. A gap between ordered, delivered and consumed shows instantly on the dashboard.
Can it generate progress claims? Yes, from the entered progress it produces the progress invoice with completion percentage and retention. You save 2 to 4 weeks per cycle.
How long to equip my teams? Expect one training day at 150 000 FCFA and a week of real use before full autonomy. Foremen quickly adopt the photo interface.
Is there a version for a single site? Yes, the 29 900 FCFA/month plan covers one active site, perfect for testing before going multi-site.
Let's talk about your project. We scope your site-tracking and progress-invoicing app in a single meeting. 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.
