The verdict in three sentences
For a fleet of 40 technicians working in boiler rooms and basements with no signal, an offline PWA at 25,000 to 50,000 EUR (about 27,000 to 54,000 USD) covers 95 % of what a native app does for less than half the price of separate iOS and Android apps (around 60,000 EUR). The main gain comes from removing double entry: 45 minutes per technician per day, more than 7,000 hours a year across the team. Plan for 3 to 4 months including ERP sync, customer signature and photos.
What a field service PWA must do
The paper work order follows an expensive path: filled in by hand, photographed or brought back to the office, re-keyed by an assistant into the ERP, then invoiced days late. The PWA replaces this with single entry on the technician's phone, which works with no network and syncs as soon as LTE returns.
| Feature | Technical detail | Indicative cost (2026 estimate) |
|---|---|---|
| Offline daily schedule | Local IndexedDB cache, refreshed on every connection | 4,000 to 7,000 EUR |
| Digital work order | Form per equipment type (gas furnace, heat pump, HRV) | 5,000 to 9,000 EUR |
| Photos and attachments | Compression, timestamp, geolocation | 2,500 to 4,000 EUR |
| Customer signature | Touch signature, PDF emailed to the customer | 2,000 to 3,500 EUR |
| ERP sync | API or connector to QuickBooks, Sage, Dynamics or a trade ERP | 6,000 to 15,000 EUR |
| Sync conflict handling | Queue, automatic retry, log | 3,000 to 6,000 EUR |
| Back office and dashboard | Job tracking, first-time fix rate | 2,500 to 5,500 EUR |
The trickiest item is sync conflict handling: two technicians editing the same customer record, a job cancelled while the technician is underground. A serious vendor describes this logic precisely in the quote.
PWA or native apps: the comparison
| Criterion | Offline PWA | Two native apps (iOS + Android) |
|---|---|---|
| Development cost | 25,000 to 50,000 EUR | 55,000 to 90,000 EUR |
| Annual maintenance | 15 % of build, one codebase | 20 % of build, two codebases |
| Rollout | Link or home-screen icon, no store | App Store and Google Play publishing, review |
| Offline mode | Full with service worker and IndexedDB | Full |
| Camera and signature | Yes | Yes |
| Advanced NFC or Bluetooth | Limited on iOS | Full |
| Updates | Instant for everyone | Depend on users accepting them |
| Timeline | 3 to 4 months | 5 to 7 months |
The PWA only loses if your technicians must drive Bluetooth Low Energy devices on iPhone or read NFC tags at scale. For a work order, photos and a signature, it is more than enough.
Plan and milestones over 3 to 4 months
| Phase | Duration | Deliverable |
|---|---|---|
| Scoping with 3 technicians and the dispatcher | 2 weeks | Field journey, work order templates per equipment |
| Mockups tested in a boiler room | 2 weeks | Validated clickable prototype |
| PWA and offline mode development | 5 weeks | Beta on 5 technicians |
| ERP connector and invoicing | 3 weeks | Synced work orders, invoice generated |
| Pilot, fixes, rollout | 2 to 3 weeks | 40 technicians equipped, 1-hour training |
Mini case study
Thomas, technical director of a heating maintenance company in Toronto, manages 40 technicians who each complete 5 jobs a day. Today every technician spends 45 minutes a day filling in, bringing back or dictating work orders, and the dispatcher re-keys everything. Over 210 working days that is 40 × 0.75 h × 210 = 6,300 hours. At a loaded rate of 38 EUR (about 41 USD) per hour, those hours cost 239,400 EUR a year. With a 40,000 EUR PWA plus 6,000 EUR annual maintenance, even if only half the time saved goes to billable jobs, the saving reaches about 120,000 EUR in year one. Bonus: invoicing moves from day 8 to day 1, which improves cash flow by tens of thousands.
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FAQ
How much does an offline PWA for technicians cost in 2026?
Expect 25,000 to 50,000 EUR depending on the number of work order types and the complexity of the ERP connector. A simple version without ERP sync starts around 18,000 EUR.
Does the PWA really work without a network?
Yes, the schedule, customer records and forms are stored on the phone. Work orders, photos and signatures wait in a local queue and upload automatically when the network returns, with a visible indicator for the technician.
Do we need new phones?
Usually not: an Android under 4 years old or an iPhone on iOS 16 or later is enough. Budget 250 to 400 EUR per rugged device if your teams work in dusty environments.
How does it connect to our ERP?
Through an API when the ERP offers one, otherwise through scheduled file exchange. The connector accounts for 6,000 to 15,000 EUR, often 25 % of the total budget.
How long to equip 40 technicians?
Between 3 and 4 months, including a 2 to 3 week pilot with 5 technicians. Training takes about 1 hour per technician.
Let's scope your project. Tell us your number of technicians, job types and ERP: we will price an offline PWA between 25,000 and 50,000 EUR on a 3 to 4 month plan. 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.
