The verdict in three sentences
In 2026, a B2B business mobile app in Berlin runs between 40,000 and 100,000 EUR cross-platform (React Native or Flutter), and climbs to 60,000 – 150,000 EUR for separate native iOS + Android development. The offline mode, essential for field teams, adds 8,000 to 20,000 EUR. Plan for 4 to 8 months of development and a monthly run of 200 to 700 EUR (backend, stores, monitoring).
PWA, cross-platform or native: which technology?
The first trade-off for an operations director is the technology. A PWA (installable web app) suffices for light office use; cross-platform covers 90% of field needs with a single codebase; native is justified for intensive uses (camera, sensors, Bluetooth, graphics performance).
| Approach | 2026 cost (EUR) | Offline | Hardware access | Best for |
|---|---|---|---|---|
| PWA (installable web) | 20,000 – 45,000 | Partial | Limited | Forms, consultation |
| Cross-platform (RN/Flutter) | 40,000 – 100,000 | Full | Very good | Field teams, most cases |
| Native iOS + Android | 60,000 – 150,000 | Full | Total | Intensive sensor/perf uses |
| Hybrid (web + wrapper) | 25,000 – 55,000 | Partial | Medium | Tight budget, MVP |
For most B2B projects in Berlin — technicians, mobile sales reps, logistics — cross-platform offers the best cost/value ratio: one codebase, two stores, a near-native experience.
Cost breakdown and run
The quoted price covers several line items. Here is a realistic breakdown for a medium-complexity cross-platform app with offline sync.
| Item | 2026 range (EUR) | Comment |
|---|---|---|
| Scoping + UX/UI | 6,000 – 15,000 | Journeys, mockups, design system |
| Mobile front-end development | 25,000 – 55,000 | RN/Flutter, business screens |
| Backend + API + database | 12,000 – 30,000 | Auth, sync, business rules |
| Offline mode + synchronisation | 8,000 – 20,000 | Queue, conflict resolution |
| Store publishing + QA | 3,000 – 8,000 | Apple/Google accounts, testing |
| Monthly run (hosting, monitoring) | 200 – 700 EUR/month | + 99 EUR/year Apple, 25 EUR Google |
A complete field app with offline mode therefore generally sits between 70,000 and 110,000 EUR, go-live included.
Mini case study
Julien, operations director of an industrial maintenance firm in Berlin, equips 45 mobile technicians. Today each job is written on paper then re-entered at the office: about 20 minutes of re-keying per technician per day. Chosen budget: cross-platform app with offline mode = 88,000 EUR, run 400 EUR/month.
By eliminating double entry, the app saves 20 min/day × 45 technicians = 15 hours/day. Over 220 working days at 32 EUR/loaded hour, that is nearly 105,000 EUR in annual savings, paying back the investment in about 10 months. Add to that data reliability and faster invoicing thanks to real-time job reports.
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FAQ
How much does a B2B business mobile app cost in Berlin in 2026?
From 40,000 to 100,000 EUR cross-platform depending on complexity, and up to 150,000 EUR for separate native iOS+Android. A simple PWA can start around 20,000 EUR.
Cross-platform or native: which to choose?
Cross-platform (React Native/Flutter) covers 90% of field needs with one codebase, 30 to 50% cheaper than native. Native is only justified for intensive sensor use or graphics performance.
Is offline mode essential?
For field teams (areas without coverage), yes: it adds 8,000 to 20,000 EUR but prevents data loss and lets people work anywhere. Without it, field adoption drops sharply.
What is the monthly running cost?
Between 200 and 700 EUR/month (backend hosting, monitoring), plus 99 EUR/year for the Apple Developer account and a one-time 25 EUR for Google Play.
How long to develop the app?
Plan for 4 to 8 months depending on scope, in sprints. A cross-platform MVP without offline can ship in 3 to 4 months.
Let's scope your project. Tell us your target users, whether offline mode is needed, and your indicative budget, and we'll recommend the technology and frame the scope. 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.
