Apps
Jobs, check-ins, evidence, timesheets, compliance and payments, one app for the contractors your business depends on.
Superstack offers contractor app development for businesses that rely on subcontractors: cleaners, trades, facilities firms and property managers. Contractors get one app to accept jobs, check in, prove the work and get paid. You get evidence, compliance and a clean bill in your accounting software without the spreadsheet.
proof and payment
contractor app development built on proof
A contractor management app serves two people: the contractor who wants paying without chasing, and the office that wants proof first. We build both from one job record, so on-site evidence becomes the bill you approve.
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A new contractor signs up on their phone, reads the health and safety induction and photographs their insurance certificate, licences and IRD details. The office checks the pack and sets them live. No job goes out until the documents are in.
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The office offers a job to one contractor or a group. A cleaner gets a push notification with the site, date, scope and rate, and taps Accept. If nobody accepts in time, it moves to the next name on the list.
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The contractor checks in on arrival and the app records the time and location against the job. A security patrol checks in at each site on the round, so the client's report shows real arrival times. Check-out closes the visit.
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Photos, a checklist and the site contact's signature attach to the job before check-out. A painter photographs each room, the property manager signs on the painter's phone, and the office has proof before the invoice exists. Disputes end with a link.
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Check-in and check-out times build the timesheet, so a contractor timesheet app that fills itself in gets submitted on time. Each entry carries the job, the rate and materials added on site, and the office sees each job's cost as it closes.
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Once the office approves the timesheet, the app generates a buyer-created invoice on the contractor's behalf, with GST applied only where they are registered. The contractor sees it in the app, and the bill lands in your accounting software for the next payment run.
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Every contractor shows a status: current, expiring or lapsed. The contractor compliance app warns both sides before insurance or a licence runs out, and a lapsed document blocks new offers until the replacement is uploaded. A client never finds the gap first.
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The office runs contractors, jobs, approvals and payments from a browser. A facilities manager opens the portal on Friday, approves the week's timesheets and sends the batch to your accounting software. Reports show cost per job, site and contractor, and who arrives late.
The office creates the job once, or it arrives from your job management system. The app handles the offering, reminders, check-in record and timesheet. The contractor accepts, turns up, takes the photos and checks out. A person steps in twice: the site contact signs, and the office approves the timesheet. Approval triggers the invoice and the accounting bill.
Your accounting software receives each approved invoice as a bill for batch payment, and payment status flows back to the contractor. Google Maps handles navigation and check-in location, Twilio sends offers by SMS, and your job management system or CRM supplies the jobs.
Any system with an API connects. Click a logo to visit them.
Xero
MYOB
Stripe
Google Workspace
Microsoft 365
Twilio
Shopify
HubSpotAI is optional. The proof-and-pay loop runs without it. We add AI only where it checks evidence faster than a person. Read how we use AI and where it fits into business process automation.
Flags a job whose photos miss a checklist item.
A check-out after closing time, or two jobs at once, gets a second look.
Reads the date off a certificate and sets the alert.
Your office uses the web app for onboarding approvals, job offers, timesheet approval, compliance status, reports and your accounting software batch. The Friday payment run happens here.
Contractors use the mobile app on their own Android or iPhone. It is a contractor job app first: today's jobs, navigation, check-in, photos, signature, check-out and the invoice.
The contractor portal is the browser version for a subcontractor's own office: renewed certificates, approved invoices, payment status and next week's offers. All three share one database, so a certificate uploaded here unblocks the phone.
Tonight's sites offered, each clean proven with photos.
TradesSubbies accept jobs, log hours and materials, get self-billed.
Facilities and maintenanceReactive jobs offered to the nearest compliant contractor.
SecurityPatrol check-ins per site, incident photos for the client.
PropertyMaintenance contractors with current insurance, signed off on site.
ConstructionA subcontractor app NZ builders use for inductions and progress photos.
DeliveryDrivers accept runs, capture proof of delivery, invoice weekly.
Quickest start
We customise an existing Superstack contractor module with your onboarding pack, job types, rates and approval rules.
Most common
We combine the contractor app with job management, compliance tracking and a contractor portal in one platform. Most contractor-heavy businesses land here.
Fully bespoke
A fully bespoke build for unusual arrangements: contractors across several entities, client-specific evidence rules or an approval chain of your own.
Contractors are separate businesses, so the app treats them that way. Each contractor owns their profile, documents and invoices. You see what you need to engage and pay them: compliance status, job history, evidence and bills. Nothing employee-shaped, such as leave or pay rates, and no tracking outside a check-in.
Yes. You pay for the platform, and contractors download the app at no cost to them. Charging contractors is the surest way to send them back to text and paper. The app has to be worth their while: faster payment, fewer phone calls and an invoice they never have to write.
Yes. Each document has an expiry date, entered at upload or read from the certificate. The contractor gets a reminder well before it lapses and again closer to the date, with the office copied in. An expired document flips the contractor's status to lapsed and blocks new offers until the renewal is checked.
Yes. Each approved buyer-created invoice becomes a bill in your accounting software with the contractor's bank account and job reference attached. On payment day you select the bills, create the batch payment in your accounting software and upload it to your bank as usual. When your accounting software marks the bills paid, the app tells each contractor.
Yes. The app stores the job, checklist, photos and check-in on the phone and sends them when a connection returns. A contractor in a basement plant room finishes the job as normal. Check-in uses the phone's clock and GPS at the moment of the tap, so offline evidence keeps its time and place.
Yes. One contractor login works across your entities, with each job tagged to the entity that pays, so invoices reach the right your accounting software organisation. Client-specific rules work the same way: a contractor doing a hospital site and a school site sees each client's induction, checklist and evidence rules on the job itself.
Built around the way you work.
Your business shouldn't have to fit someone else's software. Tell us how your business works. We'll show you what Superstack can build around it.
Tell us how you pay contractors today. We'll show you the same week without the spreadsheet.
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