The verdict in three sentences
For a 25-technician HVAC contractor in Toronto, an offline-first field service PWA with photos, customer signature and scheduling costs between USD 30,000 and 55,000 (about CAD 41,000 to 75,000). A field service SaaS charges USD 50 to 90 per technician per month, so USD 15,000 to 27,000 a year, and imposes its own workflow. The real gain lies elsewhere: 4 hours recovered per technician per week and invoicing on day 1 instead of day 15, which frees up a six-figure amount of working capital.
What the app contains, module by module
A PWA (Progressive Web App) installs from the browser on Android or iPhone, without the app stores, and stores data on the phone when there is no signal, in mechanical rooms, basements or on rooftops. Data syncs as soon as the connection returns.
| Module | Scope | 2026 range (USD) |
|---|---|---|
| Offline work order | Time, parts, findings, deferred sync | 7,000 to 12,000 |
| Photos, signature and PDF report | Before and after photos, on-screen customer signature, PDF sent automatically | 4,000 to 7,500 |
| Scheduling and dispatch | Drag-and-drop jobs, emergencies, on-demand location | 6,000 to 11,000 |
| Equipment and maintenance contracts | Asset record, history, preventive visits, refrigerant log | 5,000 to 10,000 |
| Invoicing export | Push to QuickBooks Online or Sage, HST handled | 3,500 to 7,500 |
| Back office and KPIs | First-time fix rate, average job time, contracts to renew | 4,500 to 7,000 |
The core (work order, photos, signature, export) ships in 8 to 10 weeks for USD 18,000 to 30,000. Scheduling and asset tracking follow in a second release.
Custom or SaaS: 5-year cost
| Line item (2026) | SaaS at USD 50/tech/month | SaaS at USD 90/tech/month | Custom PWA |
|---|---|---|---|
| Setup and training | USD 2,500 to 5,000 | USD 2,500 to 5,000 | USD 30,000 to 55,000 |
| Annual cost (25 technicians) | USD 15,000 | USD 27,000 | USD 4,500 to 8,250 (15% maintenance) |
| 5-year cost | USD 77,500 to 80,000 | USD 137,500 to 140,000 | USD 52,500 to 96,250 |
| Full offline mode | Varies by vendor | Yes | Yes, designed for your sites |
| HVAC-specific forms | Limited configuration | Good | Exactly your forms |
| Adding a technician | +USD 600 to 1,080/year | +USD 600 to 1,080/year | USD 0 |
SaaS remains relevant for fewer than 8 technicians or if you must go live next month. At 25 technicians and growing, the custom PWA costs less from year 3 or 4 and adapts to your contracts.
Where the 4 hours a week come from
The gain does not come from the app itself, it comes from what it removes: driving back to the shop to drop off paperwork, re-keying by the office coordinator, calls to find a serial number, photos sent by text and lost. In the HVAC firms we work with, the typical split is: 1.5 hours of trips and paperwork drop-offs avoided, 1 hour of report writing, 1 hour of searching for equipment information and 0.5 hours of back-and-forth with the office. On the office side, 15 hours a week of re-keying disappear. Refrigerant records required under Ontario's ozone-depleting substances regulation and your technicians' ODP and TSSA credentials can be stored per job and per technician.
Mini case study
Mike, owner of an HVAC company in Mississauga, employs 25 technicians for USD 3.2 million in annual revenue. His paper work orders are invoiced on average at day 15.
Time saved: 4 hours × 25 technicians × 46 weeks = 4,600 hours a year. Valuing only a third of that time as extra billable jobs, at a loaded cost of USD 45 an hour, he recovers about USD 69,000 a year. Cash: moving from day 15 to day 1 brings forward 14 days of revenue, so 3,200,000 × 14 / 365 = about USD 122,700 freed up once.
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Investment: PWA at USD 45,000 and USD 6,750 maintenance a year. Payback in under 9 months, without even counting the cash effect.
FAQ
Does a PWA really work without signal?
Yes. Work orders, photos and signatures are stored on the phone and sent when the network returns, even hours later. We test on entry-level Android phones around USD 200.
Do we need to publish on the App Store and Google Play?
No. Technicians install it from a link in 30 seconds. You avoid 2 to 4 weeks of store review and developer account fees.
Can the app handle refrigerant tracking?
Yes, each job records refrigerant added and recovered, with a log per piece of equipment exportable as PDF for inspections.
How long to equip all 25 technicians?
After 8 to 10 weeks of core development, rollout takes 2 weeks, with a half-day training per crew.
Can it connect to our ERP or quoting software?
Yes, through API or file export. Budget USD 3,500 to 9,500 depending on the software.
Let's scope your project. Send us a sample work order, your number of technicians and your accounting software: we will price a PWA between USD 30,000 and 55,000 with a core release in 10 weeks. 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.
