The verdict in three sentences
An internal web app costs between 20,000 and 60,000 EUR in 2026, delivered in 10 to 18 weeks, with role management, a dashboard and notifications. The budget is steered by cost per screen: an 8-to-12-screen tool stays manageable, beyond that you must phase. Monthly maintenance (250 to 600 EUR) and integration with existing systems are the two items most often underestimated.
Why a custom internal tool over generic software
An internal tool fits your processes exactly, with no useless fields or missing functions. It smooths the daily work of operational teams: single entry, shared statuses, automatic alerts. In Singapore, requests often come from an operations director tired of double entry across several tools that don't talk to each other.
| Screen type | Complexity | Indicative cost |
|---|---|---|
| List & search | Low | 1,500-3,000 EUR |
| Data-entry form | Medium | 2,000-4,500 EUR |
| Dashboard | High | 4,000-9,000 EUR |
| Approval workflow | High | 3,500-8,000 EUR |
| Configuration screen | Medium | 2,000-4,000 EUR |
| Export/reporting screen | Medium | 2,500-5,000 EUR |
System integration and technology choice
Integration with existing systems (ERP, payroll, messaging) weighs heavily. A well-documented API on the existing side simplifies everything; a closed system forces costly workarounds.
| Approach | Build cost | Timeline | Limit |
|---|---|---|---|
| No-code (Airtable, Bubble) | 5,000-15,000 EUR | 3-6 weeks | Scalability ceiling |
| Low-code | 12,000-30,000 EUR | 6-10 weeks | Platform dependence |
| Custom | 20,000-60,000 EUR | 10-18 weeks | Higher upfront cost |
| System integration (per connector) | 3,000-9,000 EUR | 2-4 weeks | Depends on existing APIs |
No-code is perfect for testing a need; custom becomes essential when the tool turns critical or must scale.
Mini case study
Marc, operations director of a 40-technician industrial maintenance firm in Singapore, juggles a scheduling spreadsheet, SMS and an invoicing tool. He orders a 10-screen internal app (scheduling, jobs, roles, dashboard) for 34,000 EUR, delivered in 13 weeks, with 380 EUR/month maintenance. Each technician saves 25 minutes a day of entry and coordination, about 16 hours/day across the team. Valued at 35 EUR/hour over 220 days, those hours represent over 120,000 EUR of annual capacity: the tool pays for itself in under 4 months in recovered time.
FAQ
Need a professional website?
Kolonell builds websites that attract clients, optimized for the Sénégalese market. Free quote in 2 minutes.
No-code or custom to start?
No-code (5,000-15,000 EUR) validates a fuzzy need fast. Once the tool becomes central or exceeds a few dozen active users, custom avoids the platform's ceilings.
How much to integrate with our existing software?
Expect 3,000 to 9,000 EUR per connector, depending on available API quality. Software without an open API can double that cost via workarounds.
What monthly maintenance budget?
Between 250 and 600 EUR/month for a standard internal tool: security, fixes, small enhancements. Larger enhancements are quoted separately.
How many screens in a first version?
A useful V1 often fits in 8 to 12 screens. Beyond that, better to phase to ship fast and adjust with the teams.
Can the tool evolve after delivery?
Yes, that's the whole point of custom. Plan an annual enhancement envelope of 5,000 to 15,000 EUR depending on your ambitions.
Let's scope your project. List your priority screens, the software to connect and your deadline: we'll cost it per screen. Detailed quote within 48 h. 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.
