The verdict in three sentences
For an electrical network contractor in Quebec sending 40 technicians into areas with no coverage, an offline-first PWA (a web app installed on the phone) costs roughly 70,000 to 150,000 CAD with a Montreal agency in 2026, and 4,000,000 to 7,000,000 FCFA (6,100 to 10,670 EUR) with Kolonell, the price of a medium-complexity application, over 10 to 14 weeks. Deferred sync, photos and signatures captured offline and no app store fees make it simpler than a native app for internal use. The expected gain, about 2 hours of admin data entry per technician per week, pays the project back quickly for a team this size.
PWA, native app or off-the-shelf forms
The need is clear: a complete work report on a pole or a substation, entered in a dead zone north of Mont-Laurier, and sent automatically once the network returns. Three options exist.
| Criterion | Custom offline PWA | Native Android or iOS app | Off-the-shelf form tool |
|---|---|---|---|
| Build cost (2026 estimate) | 70,000 to 150,000 CAD (Montreal agency) or 4,000,000 to 7,000,000 FCFA (Kolonell) | 120,000 to 250,000 CAD (Montreal agency) | 0 to 5,000 CAD of setup |
| Subscription | None, maintenance only | Heavier maintenance | 25 to 60 CAD per user per month |
| App store fees and review | None | Developer accounts, review delays | None |
| Offline operation | Full, local IndexedDB storage | Full | Often partial, limited to forms |
| Photos, signatures, GPS | Yes | Yes | Yes, with format limits |
| Updates | Instant on next launch | Through the stores | Automatic |
| Business logic (equipment, work orders, van stock) | Custom | Custom | Limited |
For 40 technicians, a form tool at 40 CAD per month costs 19,200 CAD a year. The custom PWA knows your work orders, equipment and customers, and with an offshore build it becomes cheaper within the first year.
What each building block costs
Here is an indicative split for a medium-complexity project, with Montreal agency ranges and the Kolonell equivalent. Exact amounts depend on the number of job types and integrations.
| Block | Share of budget | Montreal agency (CAD) | Kolonell (FCFA) |
|---|---|---|---|
| Scoping of field journeys and job types | 10 % | 7,000 to 15,000 | 400,000 to 700,000 |
| Dynamic forms and work orders | 25 % | 17,500 to 37,500 | 1,000,000 to 1,750,000 |
| Offline storage and deferred sync with conflict handling | 25 % | 17,500 to 37,500 | 1,000,000 to 1,750,000 |
| Compressed photos, customer signature, geolocation | 15 % | 10,500 to 22,500 | 600,000 to 1,050,000 |
| Supervisor back office, dashboards, PDF export | 15 % | 10,500 to 22,500 | 600,000 to 1,050,000 |
| Field testing, training, rollout | 10 % | 7,000 to 15,000 | 400,000 to 700,000 |
Beyond this scope, for example ERP integration, per-van stock management or automatic route planning, the project moves into the complex category, 7,000,000 to 15,000,000 FCFA and up with Kolonell.
Technical choices that prevent bad surprises
Photos compressed on the phone. A 4 MB photo reduced to 300 KB lets 20 photos sync over a weak connection in minutes and protects the data plan.
Conflict handling. If a supervisor edits a work order while the technician is offline, the merge rule must be set at scoping: the latest field entry wins on technical fields, the office wins on scheduling.
Device fleet. A PWA runs on Android 9 and later with Chrome, and on recent iPhones with some storage limits to plan for. Rugged phones are not mandatory, but at least 4 GB of RAM and 64 GB of storage are advisable.
Data and security. Local data encryption, PIN lock and remote wipe if a phone is lost, in line with Quebec's Law 25 on personal information.
Mini case study
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Illustrative scenario: Marc-André, technical director of a 40-technician contractor that installs and maintains low and medium voltage networks around Montreal, finds that each technician spends about 2 hours a week copying paper reports at the office.
Project: a medium-complexity PWA. Option A, Montreal agency: 110,000 CAD plus 1,500 CAD monthly maintenance. Option B, Kolonell: 5,500,000 FCFA (8,380 EUR, about 12,500 CAD) plus 75,000 FCFA monthly maintenance (about 170 CAD).
Gain: 2 hours a week for 40 technicians over 46 weeks, so 3,680 hours a year. At a loaded cost of 55 CAD an hour, that is 202,400 CAD a year. Option A pays back in about 7 months, option B in under 1 month, not counting faster invoicing thanks to a signed report sent the same day.
FAQ
How long can the PWA work without signal?
Several days. With compressed photos, a 64 GB phone easily stores over 500 jobs waiting to sync.
Do we need to publish the app on Google Play or the App Store?
No. Technicians install it from a link in 30 seconds, and updates apply on the next launch with no review delay.
Is the customer signature valid as proof?
It is time-stamped, geolocated and attached to the PDF report, which is enough for most maintenance contracts. For stronger legal weight, a qualified e-signature service adds about 2,000 to 5,000 CAD of integration.
What if a phone with unsynced data is lost?
Local data is encrypted and access is revoked from the back office. Only unsynced jobs are lost, which is why automatic sync as soon as any signal appears matters.
Can van stock tracking be added later?
Yes, as a later release. With Kolonell, allow 1,500,000 to 3,000,000 FCFA depending on the number of SKUs and the link with the central warehouse.
Let's scope your project. Tell us your number of technicians, job types and coverage areas: we price your PWA within the 4,000,000 to 7,000,000 FCFA range (6,100 to 10,670 EUR) and the go-live timeline. 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.