Notes app. Random photos. Paper estimates. The spreadsheet you started in 2021. Your wife's filing system. That's what most solo contractors call a business. Clamp replaces all of it.
Clamp gives you a document for each stage of your project. The lead carries into the design agreement. The estimate carries into the proposal. The change order carries into the invoice. You build it all once, in the same app.
Phone rings. You log the lead in 30 seconds — name, project type, source, follow-up date. Every call becomes a tracked lead. Not a sticky note that disappears.
Send a paid scope-of-work agreement before you spec a single cabinet. Stop doing $400 of free design work for tire-kickers. If they sign, you've built trust. If they don't, you saved your Saturday.
Build the estimate on your phone. Pick from pre-built assemblies. Set allowances and exclusions. Done before you leave the driveway — not the next weekend.
Convert the estimate to a branded proposal with payment schedule, scope, and exclusions in plain language. Homeowner signs on their phone. No more 2008-era Word docs.
Bigger vanity? Extra outlet? Upgraded faucet? Log the change order on the spot. Capture and bill it on the same screen. Stop leaving $300–$3,000 per job on the table.
Generate invoices from milestones. Send a payment link. Get paid same-day on a phone — not three weeks later, not after two follow-up calls.
You're paying $30–$80 a month spread across four or five apps that weren't built for solo contractors. Clamp replaces them all for $12.42/mo on annual.
Clamp price shown on annual billing. Monthly $19.99.
| Feature | Clamp | Typical app |
|---|---|---|
| Lead tracking | ✓Turn every call into a tracked lead | ✕Not in invoice apps |
| Design agreements | ✓Charge for estimates | ✕Not available anywhere |
| Estimates | ✓Mobile-native estimate builder | ~Yes in most |
| Branded proposals | ✓Your logo, signable on phone | ~Often paywalled |
| Change orders | ✓Capture & bill on the spot | ✕Joist Elite tier only |
| Invoices with payment links | ✓Unlimited, no caps | ~Often capped or extra |
| Auto GPS mileage tracking | ✓Built in, linked to jobs | ✕Separate app required |
| Auto time on site tracking | ✓Logged automatically per job | ✕Manual timer or none |
| Receipt capture | ✓Snap, tag to job, export | ✕Separate app required |
| Project photos | ✓Attached to leads & jobs | ~Separate $24+/mo app like CompanyCam |
| Works fully offline | ✓100% local storage | ✕Most require cloud |
| No account required | ✓Your device, your data | ✕Account required by all |
| Built for solos | ✓One person, top to bottom | ✕Team-shaped or stripped down |
| Lifetime option | ✓$199 once, own the app forever | ✕Subscription only |
Solo contractors don't lose jobs because they're bad at the work. They lose them because the paperwork around the work is falling apart. Here's what's actually on your mind — and how Clamp answers it.
"I'm drowning in leads. I can't keep track of who I quoted, who I followed up with, or who ghosted me."
What you're thinking
in the truck, before the first coffee
"I need to get this estimate out today. The homeowner's going to ghost if I take another week."
What you're thinking
eating lunch in the truck after a walkthrough
"I don't want to miss scope. Last job I forgot to bill the demo and ate $1,200."
What you're thinking
walking a job with a clipboard
"I don't want the homeowner arguing about price at the end. I want them to know what they're getting before they sign."
What you're thinking
drafting a proposal at the kitchen table
"I need this proposal to look professional. The bigger guy down the road has branded PDFs and I'm sending a Word doc."
What you're thinking
comparing yourself to a competitor's quote
"I can't spend four hours estimating every kitchen. Half of them ghost me anyway."
What you're thinking
at the desk after dinner, dreading the evening
Built for the solo contractor who's tired of stitching four apps together. Try it free.
One app. Three ways to pay. Optional Assistant for contractors who want the work done, not just organized. No fake tiers, no feature paywalls. The annual plan works out to less than a coffee a week. The lifetime plan pays for itself in 10 months of monthly billing — then you own the app, period.
For solo contractors who want the work done, not just organized. The Assistant drafts what needs drafting, sends what needs sending, and tracks what needs tracking — so you don't. Available as an add-on, cancel anytime.
Detailed side-by-side comparisons against every app in a solo contractor's stack — features, pricing, and what users actually complain about.