Custom handyman business app development
Paper work orders that go missing, hours typed up by hand and material costs that only reach the accounts weeks later: familiar to every contracting business. Appfront builds custom apps that let your engineers handle work orders in the field, record additional work and share photos of the finished job, while the office follows along in real time on the digital planning board.
From paper job sheet to digital management
In the contracting sector, everything revolves around work orders. Every job starts as a work order and ends with a signed slip, but most contracting businesses still do this on paper. That causes daily hassle: slips left in the van, illegible handwriting that the back office struggles with, and hours that are only entered days later. A custom app replaces that paper flow with a digital process that runs straight from work order to invoice.
Digital job sheets
The engineer opens the work order on their phone and records start time, materials used and work carried out. On completion, the customer signs off digitally. The sheet is immediately in the system: no retyping, no lost forms.
Work order lifecycle
From request to handover, you track every work order through each stage: scheduled, on the way, started, additional work reported, completed, invoiced. Your planner can see at a glance which jobs are in progress and which are stuck.
Scheduling and planning board
A visual planning board with drag and drop: move work orders to the right day and engineer. Take travel time, specialisms and availability into account. Engineers see their daily schedule automatically in the app.
Photo documentation
Fitters take before and after photos directly in the app. Photos are automatically linked to the job sheet, complete with timestamp and GPS location. Essential for damage claims, warranty issues and handover to housing associations.
Materials and van stock
Recording of materials used per job sheet. Integration with a van stock module so fitters can see what they have on board and the warehouse knows when to restock. No extra trips to the wholesaler.
Time registration
Automatic time recording per work order: clock in and out on the job, with travel time recorded separately. Timesheets are passed straight to payroll or used as the basis for post-job costing and invoicing.
Post-job costing and invoicing without manual retyping
For most handyman and renovation businesses, post-calculation is the real pain point: admin collects job cards, retypes hours and materials into a spreadsheet or accounting package, and only then sends the invoice. That process doesn't just cost time — it introduces errors. One forgotten hour here, one unbilled fitting there, and by the end of the month margins have slipped without anyone quite knowing why.
With a custom handyman app, post-calculation becomes an automated process. As soon as the fitter closes their job card, the system calculates the total costs: hours worked multiplied by the agreed rate, plus materials used at purchase price with mark-up. For time-and-materials jobs, the invoice goes out straight away. For fixed-price work, the system compares actual costs against the pre-calculation, so you can see deviations per project before they get out of hand.
Additional work — the source of many disputes — is recorded separately in the app. The fitter flags it on site, the client approves it digitally, and the extra work appears as a separate line on the invoice. No follow-up phone calls, no "we never discussed that".
What you gain with digital post-calculation
- Direct billing of hours and materials — no intermediate spreadsheets
- Pre-calculation versus post-calculation per project, so you can keep an eye on margins
- Additional work approved on site and automatically added to the invoice
- Invoicing that fits your accounts: per job card, weekly, or through instalment billing
- Insight into labour hours per fitter, per project type and per client
- Fewer corrective invoices, as everything is recorded digitally and in real time
Whether you work on a time-and-materials basis, with a fixed contract sum, or through instalment billing on larger projects, the app adapts the invoicing process to your way of working, not the other way round.
From sole traders to franchise chains: custom solutions for every scale
The trades sector in the Netherlands is diverse. A self-employed all-round handyman has different needs from a handyman business with twenty employees or a franchise organisation with branches across the country. We build apps that suit your situation — not a standard package you have to squeeze into.
Sole traders and small handyman businesses
As a self-employed tradesperson, you are planner, fitter and administrator all in one. You don't need a heavy ERP system, but you do need an app that handles job cards digitally, keeps client details, and generates invoices. A lightweight app that works from the van — even when you're in a crawl space with no signal — and has your hours and materials ready for the accountant at the end of the day.
For freelancers, it's essential that the app works offline. Not every site has a stable 4G connection. The fitter completes the job sheet, and as soon as the connection is restored, everything syncs automatically. No duplicate entry, no lost data.
SME handyman businesses (5–30 employees)
In a handyman business with several field fitters, scheduling becomes the bottleneck. Who goes where? Which van carries which materials? Who is available for an urgent job? A digital planning board with real-time updates replaces the whiteboard in the office and the endless rounds of phone calls.
At this scale, the distinction between time-and-materials and fixed-price work also becomes important. The app supports both ways of working: for time-and-materials jobs, everything revolves around accurate hour and material tracking; for fixed-price work, around budget monitoring and pre-calculation. Project managers can see per job whether they are still within budget, without having to wait for admin to process the job cards.
Franchise chains
Organisations such as De Klussenier work with independent franchisees who operate under a shared brand. That places specific demands on the app: a central CRM with customer history per branch, standardised work processes with local flexibility, and reports that are useful at both branch and chain level. We build the app so that head office keeps an overview while each franchisee runs their own jobs smoothly.
Housing association contractors
Trade businesses working for housing associations deal with tenancy turnover maintenance, planned maintenance and service contracts with SLAs. They need software that speaks the association's language: property unit numbers (VHE numbers), NEN 2767 condition scores, and handover records with photos for each room. An integration with the association's property management system, such as Planon or Condor, is often required too. We build these integrations so your fitters can work in their own app, while data flows back automatically to the client's system.
How we build your maintenance contractor app
Process analysis
We map out your working process: how do work orders come in, how do you schedule engineers, how does post-job costing work, and which systems do you use today? This forms the basis for the design.
MVP field service app
A working app for your engineers: retrieve work orders, record hours and materials, take photos, and have work sheets signed. Quick to use in the field, improved iteratively based on real feedback.
Scheduling board and back office
A web application for planners and administration: a visual planning board, job costing reports, invoicing export and customer management. Linked to the field app through real-time synchronisation.
Integration and expansion
Integration with your accounting software, a customer portal for status updates if needed, and extensions such as van stock, subcontractor management or reporting modules as your business grows.
Integrations with your accounting and business software
An app on its own only solves half the problem. The real gains come from integrations: data flowing automatically from job sheet to invoice to accounts, with no one retyping anything. We build API integrations that connect your trade business app to the systems you already use.
Accounting and ERP
Invoices, timesheets and material costs flow automatically into your accounting package. No manual exports, no duplicate entry. For Exact Online, for example, we integrate directly with customers, items and sales invoices via their REST API.
Property and clients
For trade businesses working for housing associations or property managers, we build integrations with their FMIS (facilities management information system). Work orders arrive automatically, and handover photos and timesheets are sent back automatically.
Technology stack
We build your maintenance contractor app on proven technology that scales with your business. Cross-platform development with Flutter delivers a native experience on iOS and Android from a single codebase. The backend runs on Node.js or Python with PostgreSQL as the database, hosted on scalable cloud infrastructure.
Offline-first architecture
Engineers regularly work in cellars, crawl spaces and new-build sites without mobile coverage. That is why we build every maintenance contractor app with an offline-first architecture: all work order data is stored locally on the device. As soon as connectivity returns, the app syncs automatically with the server. Conflict handling, for example when a planner has meanwhile changed the work order, is resolved intelligently without data loss.
Why choose Appfront as your partner for your maintenance contractor app
Building an app for a handyman business is about more than designing screens and writing code. It requires understanding your daily working processes: how a work order comes in (phone, email, housing association portal), how the planner organises the day, what a fitter needs when they're standing at a locked front door, and how the admin team handles the final costing at the end of the week. That operational knowledge determines whether an app actually gets used or ends up forgotten in a drawer after two weeks.
Appfront builds custom applications for businesses that want to digitise their field service processes. We have experience with comparable projects in logistics (see our courier app), where the same challenges apply: field staff who need to work offline, real-time synchronisation with the office, and integrations with existing business software.
We work in short sprints. After the first sprint, you have a working app that you can test with a few fitters. We build on the basis of their feedback. That prevents us from spending months working in an ivory tower on something that doesn't quite fit how your people actually work in practice.
- Cross-platform: iOS and Android from a single codebase using Flutter
- Offline-first: complete work orders without mobile signal
- Integration with Exact Online, Snelstart, AFAS and other accounting packages
- Integrations with property systems (Planon, Condor) for housing association work
- Scalable from a sole trader to a franchise chain
- Ongoing maintenance, monitoring and support after handover
- Photo documentation with automatic linking to job sheets
- Additional work registration with digital client approval
Client portal and subcontractor management
Client portal for clients
Alongside the fitters' app and the back-office dashboard, we can optionally build a client portal: a web environment where your clients can track the status of their work orders, view completion photos and submit new jobs. For housing associations and property managers who send you dozens of work orders a week, this replaces the endless cycle of emails and phone calls. The client logs in, sees which jobs are scheduled, which are in progress and which are completed, including the related photos and work orders.
For private customers, the portal can be simpler: a status link sent by text message or email, showing when the fitter is on the way and when the job is finished. It's similar to track-and-trace from a parcel service, but for your handyman service.
Subcontractors in your workflow
Many handyman businesses work with regular subcontractors for specialist work: a plumber, an electrician, a plasterer. However, work order flows to subcontractors often run through loose messages and phone calls, which means there's no clear overview.
In the app, we give subcontractors their own role: they receive work orders through the app, record their hours and materials in the same way as your own fitters, and the final costing is updated automatically. You keep control of the overall project without having to track twenty WhatsApp conversations. The subcontractor works within your system but only sees their own jobs.
See our other services for more options relating to custom software.
Frequently Asked Questions
The investment depends on scope: a field app with digital job sheets and time recording is a different project from a complete platform with a planning board, job costing, a customer portal and integrations with Exact Online or Planon. After an intake meeting in which we walk through your working processes, we prepare a clear quote. We work to a fixed project price so you know exactly where you stand up front.
Yes. We build integrations with all the common accounting packages used in the trades sector: Exact Online, Snelstart, AFAS, Moneybird and others. Hours, material costs and invoices flow automatically from the app into your accounts. For Exact Online, we integrate at the level of customers, items and sales invoices. For Snelstart, we use their API to create entries and invoices. The integration is custom built to fit how you have set up your bookkeeping.
An MVP with job management, digital job sheets and time tracking can be tested in the field by your engineers within a few weeks. From there, we build iteratively: planning board, post-job costing, integrations, customer portal. The full timeline depends on complexity, but our sprint approach means you have a working product in hand quickly, rather than waiting months for a big-bang delivery.
Yes, that is a core requirement. Fitters often work at locations with no reliable mobile signal: cellars, new-build projects, plant rooms. The app stores all work order data locally. You simply complete the job sheet, take photos and record materials, all without an internet connection. As soon as the device regains signal, the app syncs automatically with the server. Any conflicts, such as a work order that has since been changed by the planner, are handled intelligently.
Yes, but set up differently. For a sole trader, we build a lightweight app focused on job sheets, invoicing and customer management, without the overhead of a planning board or subcontractor management. For a small or medium trades business with several vans, planning, team overviews and post-job costing are added. And for franchise chains, we build a multi-tenant structure with central customer management and cross-branch reporting. The same technical foundation, but configured differently for each scale.
Additional works are a separate feature in the app. When an engineer finds on site that extra work is needed, such as a leak behind a wall or an electrical circuit that does not comply, they record it in the app with a description, estimated costs and photos. The customer can approve it digitally right on the engineer's screen. The approved additional work appears as a separate line on the job sheet and is invoiced separately. This avoids disputes afterwards and gives you a permanent digital record of the approval.
Yes. After go-live, we monitor the app for availability and performance. We fix bugs, roll out updates when Apple or Google release a new OS version, and extend functionality as your business grows or your work processes change. You have a fixed point of contact, not a ticketing system where your question disappears. See our approach on the our work page for examples of long-running collaborations.
Ready to digitise your job sheets?
Tell us about your cleaning business and workflow. We'll help you find the right approach, from a smart field-service app to a complete platform with scheduling, post-job costing and integrations with your accounts.