The verdict in three sentences
For an elevator maintenance company with 25 technicians in New York, a custom field service web app costs 45,000 to 85,000 USD and ships in 3 to 5 months as an offline-capable PWA. It replaces the mix of paper, text messages and spreadsheets, captures the customer's signature on a tablet and saves roughly 1 hour per technician per day, about 5,500 hours a year. Against off-the-shelf licences at 40 to 60 USD per technician per month, custom is justified when your maintenance contracts, on-call rotations and NYC Department of Buildings inspection requirements do not fit a standard tool.
What the current mess really costs
Owners rarely see the true cost of paper. It shows up in three places: evening paperwork, wasted trips (missing part, wrong access code) and late invoices. In elevator maintenance, you also have to keep maintenance logs per device and meet the periodic and annual inspection cycles required in New York City.
| Item (2026 estimate, 25 technicians) | Paper, texts and spreadsheets | With a field app |
|---|---|---|
| Admin time per technician per day | 45 to 75 min | 10 min |
| Admin hours per year (220 days) | 4,100 to 6,900 h | 920 h |
| Loaded cost of those hours (65 USD per hour) | 267,000 to 447,000 USD | 60,000 USD |
| Delay between job and invoice | 10 to 20 days | same day |
| Repeat visits due to missing part or info | 6 to 8 % | 2 to 3 % |
| Customer disputes over whether a visit happened | 2 to 4 a month | rare (photo, timestamp, signature) |
| Real-time visibility for dispatch | none | status of every job |
Saving one hour per technician per day equals about 5,500 hours a year, or the capacity of 3 full-time technicians. Even if you bank only half of that, the app pays back within a year.
Custom or off-the-shelf: the comparison
Field service software generally costs 40 to 60 USD per technician per month. It works for generic trades. Elevator maintenance has specifics: contracts with mandated visit frequency, night and weekend on-call, entrapment calls with contractual response times, and parts tracking per device.
| Criterion | Off-the-shelf licence (50 USD per technician per month) | Custom app |
|---|---|---|
| Initial cost | 3,000 to 8,000 USD configuration | 45,000 to 85,000 USD |
| Annual cost for 25 technicians | 15,000 USD in licences | 7,000 to 13,000 USD maintenance |
| 5-year cost | 78,000 to 83,000 USD | 80,000 to 150,000 USD |
| Offline mode (shafts, basements, machine rooms) | often partial | full, sync when back online |
| Maintenance log per device | needs adapting | native, PDF export for building managers |
| On-call and entrapment handling | generic | priority, alerts, contractual timer |
| Accounting integration | limited connectors | custom (QuickBooks, Sage Intacct, NetSuite) |
| Data ownership | with the vendor | with your company |
At the low end, custom is roughly at par with a licence over 5 years. At 85,000 USD it costs more, and is only justified if business specifics save time or win contracts. That is why scoping must price exactly the workflows that do not fit a standard tool.
The typical scope of a field service PWA
A PWA installs on a tablet or phone without going through the app stores. It works offline, which is essential in a machine room with no signal. The core scope covers scheduling and route allocation, job sheet with checklist per device type, before and after photos, customer signature on tablet, PDF service report sent automatically to the building manager, parts consumption and an owner dashboard. Plan 12 to 16 weeks of development for that core, then 4 to 6 weeks for accounting integration.
Mini case study
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Mike, owner of an elevator maintenance company in New York, employs 25 technicians who spend an average of 55 minutes a day on paper forms and texting the office. With the app, that drops to 10 minutes, a saving of 45 minutes per technician per day. Over 220 days that is 4,125 hours, valued at 65 USD per loaded hour: 268,000 USD a year. Mike converts only a third into extra billable jobs, about 89,000 USD. For a 65,000 USD project with 10,000 USD of annual maintenance, payback arrives around month 10.
FAQ
How long does it take to roll the app out to technicians?
Plan 3 to 5 months overall: 3 weeks of scoping, 12 to 16 weeks of development, then a 2-week pilot with 3 to 5 technicians before full rollout. Field onboarding usually takes half a day of training.
Does the app work without signal in machine rooms?
Yes, a well-built PWA stores the day's jobs on the device and syncs as soon as signal returns. It can hold several hundred job sheets, photos included, offline.
Does a tablet signature hold up in a dispute?
A captured handwritten signature combined with timestamp, geolocation and photos is strong evidence for a service report. For contracts, an e-signature compliant with the ESIGN Act, around 1 to 3 USD per signature, is preferable.
Do we need to buy tablets?
A rugged Android tablet costs 400 to 800 USD, so 10,000 to 20,000 USD for 25 technicians. Existing company phones are often enough, since the PWA adapts to the screen.
What does app maintenance cost?
Budget 15 % of the initial cost per year, so 7,000 to 13,000 USD. That covers hosting, bug fixes, compatibility with new Android and iOS versions and some enhancements.
Let's scope your project. Tell us your number of technicians, contract types and accounting software, and we will price the scope, indicative budget and rollout date. 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.
