The verdict in three sentences
A custom field service app costs EUR 40,000 to 110,000 in 2026 in Dublin, delivered in 4 to 7 months, with annual maintenance of 12 to 18% of the budget. Offline mode, geolocation and customer signature are the functions that separate a real field app from a plain web form. The real trade-off is against field service SaaS at EUR 30-80/user/month, profitable as long as your processes stay standard.
The items that structure the budget
A field app must work in a van with no signal, sync when connectivity returns, and produce a usable proof of intervention. Each technical requirement has a precise 2026 cost.
| Function | 2026 range (EUR) | Timeline |
|---|---|---|
| Scheduling & technician assignment | 8,000 - 20,000 | 3-6 wks |
| Offline mobile app / PWA | 12,000 - 30,000 | 5-9 wks |
| Geolocation & route optimisation | 6,000 - 18,000 | 3-6 wks |
| Customer signature & proof of work | 4,000 - 10,000 | 2-4 wks |
| Back-office & service reporting | 8,000 - 22,000 | 3-6 wks |
| Field testing & rollout | 4,000 - 15,000 | 3-5 wks |
| Total | 40,000 - 110,000 | 4-7 months |
Robust offline mode is often underestimated: it's the most technical item, because you must handle sync conflicts when several technicians edit the same data.
Custom app or field service SaaS
Field service SaaS platforms are mature in 2026. The question is the total cost across your technician fleet and how specific your interventions are.
| Criteria | Custom app | Field service SaaS |
|---|---|---|
| Upfront cost | EUR 40,000 - 110,000 | EUR 0 - 8,000 (setup) |
| Recurring cost | Maintenance 12-18%/yr | EUR 30 - 80/user/month |
| Cost at 40 technicians/yr | ~EUR 12,000 - 20,000 maint. | ~EUR 14,400 - 38,400 |
| Process fit | Total | Standard + options |
| Time to deploy | 4 - 7 months | 1 - 2 months |
| Data ownership | You | The vendor |
Read for 40 technicians: SaaS costs EUR 14,400 to 38,400/yr in licences; custom needs EUR 70,000 upfront then ~EUR 14,000/yr maintenance. The break-even typically lands between year 2 and year 4, sooner if your processes are too specific for a SaaS.
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Mini case study
Karim, service manager at an HVAC maintenance firm in Dublin, runs 40 technicians. On SaaS at EUR 55/user/month he pays EUR 26,400/year in licences. A custom app at EUR 78,000 with EUR 13,000/yr maintenance costs 78,000 + 39,000 over 3 years = EUR 117,000, versus EUR 79,200 on SaaS. SaaS stays cheaper over 3 years — but Karim needs a specific routing module and an ERP integration the SaaS doesn't cover, which justifies custom beyond year 4.
FAQ
What does a field service app cost in 2026? Between EUR 40,000 and 110,000 depending on offline mode, geolocation and integrations. A scoped version without offline can drop below EUR 40,000.
Is offline mode essential? Yes if your technicians work in poorly covered areas. It's the costliest item but it drives field adoption.
What's the delivery timeline? 4 to 7 months. A first scheduling + data-entry lot can ship in 2-3 months, with offline and geolocation added after.
From how many technicians is custom worthwhile? Rarely below 30-40 technicians versus SaaS, unless you need very specific processes or deep ERP integration.
How much is annual maintenance? 12 to 18% of the project budget, i.e. EUR 5,000 to 20,000/yr depending on app size and pace of enhancements.
Let's scope your project. Tell us your technician count, your offline needs and your ERP integrations, and we'll cost a field app with a first lot you can deploy quickly. 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.
