The verdict in three sentences
In 2026, a bespoke mobile field-service app in Germany (job orders, offline mode, customer signature) runs EUR 45,000-110,000 over 12 to 20 weeks, EU-hosted and GDPR-compliant. An FSM SaaS at EUR 30-60/user/month starts faster but gets expensive at scale and freezes your processes. For 60 technicians, a 20 % gain in jobs completed per day is worth far more than the initial price gap.
FSM SaaS or a bespoke app: the 2026 numbers
An FSM SaaS is a recurring cost proportional to headcount; custom is an asset whose cost is independent of the number of technicians.
| Criterion | FSM SaaS | Bespoke app |
|---|---|---|
| Entry cost | 0 to 8,000 EUR (setup) | 45,000 to 110,000 EUR |
| Recurring cost (60 technicians) | 21,600 to 43,200 EUR/year | maintenance 15-20% of build/year |
| Time to go live | 4 to 10 weeks | 12 to 20 weeks |
| Robust offline mode | Varies by vendor | Native, bespoke |
| Signature + timestamped photos | Standard | Bespoke |
| Workflow personalisation | Limited | Total |
| EU hosting / GDPR | Vendor-dependent | Guaranteed (Frankfurt, OVH) |
What a 45,000-110,000 EUR build covers
Scope drives price. A 2026 order-of-magnitude breakdown for a fleet of 60 technicians.
| Module | Range EUR | Indicative time |
|---|---|---|
| Technician mobile app (iOS/Android) + offline | 15,000 - 34,000 | 4-6 weeks |
| Job scheduling and assignment | 10,000 - 24,000 | 3-4 weeks |
| Customer signature, photos, job reports | 8,000 - 18,000 | 2-4 weeks |
| Dispatcher back-office + real-time tracking | 9,000 - 22,000 | 3-4 weeks |
| ERP/billing sync | 6,000 - 16,000 | 2-3 weeks |
| EU hosting, GDPR, acceptance testing, training | 5,000 - 11,000 | ongoing |
Annual maintenance runs 15 to 20 % of the build: on 75,000 EUR, budget 11,250 to 15,000 EUR/year. Compare that to 21,600-43,200 EUR/year of FSM subscriptions for 60 technicians, which rise with every hire.
Need a professional website?
Kolonell builds websites that attract clients, optimized for the Sénégalese market. Free quote in 2 minutes.
Mini case study
Stefan, services director of an HVAC maintenance firm in Berlin (60 technicians), loses time on paper round-trips and re-keying reports. He invests EUR 78,000 in a bespoke app with offline mode and signatures, plus 13,000 EUR/year maintenance. A 20 % gain in jobs per day raises the average from 5 to 6 jobs per technician: 60 technicians × 1 job × 220 days = 13,200 extra jobs/year. At an average net margin of 25 EUR per job, that is 330,000 EUR/year. Even crediting just 20 % of that potential, the build pays back in under 6 months and removes the 21,600 EUR/year of SaaS considered.
FAQ
Isn't an FSM SaaS like Salesforce Field Service enough? For standard flows, often yes. Custom makes sense when your jobs have their own business logic, when offline mode must be flawless in dead zones, or when per-user cost becomes prohibitive beyond 40-50 technicians.
Is offline mode really reliable? Yes, it's a key benefit of custom. Job data is stored locally and synced the moment the network returns, with conflict handling. The technician works uninterrupted in basements or rural areas.
Realistic timeline for 60 technicians? Budget 12 to 20 weeks for a first production version, piloting on 5-10 technicians before general rollout.
Is GDPR an obstacle? No, if hosting is in the EU (AWS Frankfurt, OVH, Hetzner) with encryption and minimisation of geolocation data. A processing register and DPA are provided, compliant with the German BDSG.
Can we start small? Yes. Many begin with the technician app + scheduling at 25,000-40,000 EUR, measure the productivity gain, then add billing. That's the approach we recommend.
Let's scope your project. Tell us your number of technicians, offline needs and ERP for an indicative budget between 45,000 and 110,000 EUR. 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.
