On site
Record it before you leave the area
Photos, location, a voice note and who asked for it, saved on the phone when there is no signal and in your crew’s own language.
For UK specialist subcontractors
Commercial control from site to final account.
Crews record every change on site, with photos and who asked for it. Your QS prices it, gets it instructed and sees cost against value on every job.
- NEC4 and Construction Act deadlines counted for you, JCT once your periods are in
- A site app that works with no signal, in 10 languages
- Invoices to Xero, Sage or QuickBooks, marked paid when they are
Free for your first job: one project, two users, no card.
Contract deadline
Pay less notice due in 3 days
Valuation 6 · Wharfside One TowerMain contractor’s deadline: 15 Oct 2026
Works with what you already use
Connects to
- Xero
- Sage
- QuickBooks
Certified valuations and homeowner invoices go across as sales invoices, and are marked paid when they are paid there. On every paid plan.
On site
Works offline, in 10 languages
- English
- Deutsch
- Español
- Français
- Italiano
- Nederlands
- Polski
- Português
- Українська
- 日本語
Captures are saved on the phone and sent by themselves when signal returns.
Free calculator
What are unrecovered variations costing you?
Put in your turnover and two honest assumptions, and see the maths line by line against the plan’s real price.
Open the calculatorModules
One system for the commercial side of every job.
Every variation, from the first photo to payment
- Ten stages from potential to paid, each one timestamped
- Forward a site email and it lands as a draft variation, with the email filed as evidence
- Alerts at 28 and 42 days on anything still waiting for an instruction
Every contract clock, counted for you
Worked out from your own contract and your own dates. You hear about a deadline before it passes, not after.
7 weeksto notify a compensation event on an NEC4 subcontract (ECS clause 61.3)
s.111pay less notices under the Construction Act, with days counted the way s.116 counts them
28 / 42day alerts on every variation still waiting for an instruction
JCT clocks start once your subcontract’s own periods are entered.
Read about contract deadlines
Cost against value, every period
- Your QS’s CVR each period, with value taken from the valuations already in the system
- Forecast revenue and margin by project
- Project profitability across the business
How it works
Site and office, finally looking at the same job.
The person who saw the change records it. The person who gets it paid sees it the same minute. Nobody retypes a WhatsApp photo into a spreadsheet.
In the office
Price it, send it, chase it
Your QS prices the variation, sends it for instruction and sees every one that is ageing. Certified valuations go to Xero, Sage or QuickBooks as sales invoices.
Work out your own ROI
What is variation leakage costing you?
No inflated headline number. Put in your own figures and see the maths, line by line, against the plan’s real price.
Your numbers
£2,000,000
Your yearly turnover.
2%
Share of turnover exposed to under-claimed or untracked variations. The Get It Right Initiative puts the direct cost of avoidable error at around 5% of project value. That covers every kind of error, not only variations, so the default is lower.
40%
How much of that at-risk value better evidence, ageing alerts and one-click instruction help you actually recover. An assumption: set it to whatever you'd believe.
Plan
Billed annually (£1,920/yr + VAT, 20% off monthly).
The maths, from your inputs
- Value at risk / year
- £40,000
- Recovered with VariationFlow
- £16,000
- Subscription (VariationFlow, annual)
- −£1,920
- Net benefit / year
- £14,080
8.3×
recovered ÷ subscription
Break-even: £1,920 of recovered variations a year.
Illustrative, from figures you set. Not a guarantee. Benchmark: the Get It Right Initiative puts the direct cost of avoidable error at around 5% of project value, and the total at 10 to 25% with indirect costs. That is a cost of error, not revenue you can recover.
Who it’s for
Made for the people who do the building.
Subcontractors
Variations, valuations and contract deadlines when you work under a main contractor.
On VariationFlow
Quantity surveyors
CVR each period, the recovery dashboard, the site diary and the audit trail, for QSs and commercial managers.
On VariationFlow
Domestic builders
Online quotes, extras the homeowner signs, and stage payments for work in people’s homes.
On Builder
Quality and handover
Inspections, NCRs, snags, RAMS and handover packs, signed off by link.
On VariationFlow + QA Flow
Builder · £49 a month + VAT
Working in people’s homes? Get every extra signed.
Send the quote online. The homeowner approves each extra on their phone and agrees the price before you start it.
- Quotes, and extras the homeowner signs online
- Deposit, stage payments and invoices
- Cancellation notices under the Consumer Contracts Regulations
- Invoices straight to Xero, Sage or QuickBooks
Up to 5 users. Domestic projects up to £100,000 excluding VAT.
See BuilderPricing
Three plans, and no charge per user.
Start free on your first job: one project, two users, no card.
Builder
For builders working directly with homeowners
£49/month ex VAT
Up to 5 users · projects up to £100,000 ex VAT
VariationFlow
For subcontractors working under main contractors
£200/month ex VAT
Unlimited users · CVR, deadlines and valuations
VariationFlow + QA Flow
Commercial control and quality in one platform
£400/month ex VAT
Unlimited users · inspections, NCRs and handover
Paid plans have a 6-month minimum term. Save 20% paying annually. Compare every feature
Start free on your next job.
The free plan covers one project and two users, with no card and no setup fee. Or book a demo and see it on one of your own jobs first.
Not ready to switch? Send one live job for a free recovery check