Best Contractor Invoice & Estimate App for iOS in 2026

The best contractor apps combine estimates and invoicing in one seamless workflow. Create the quote, win the job, convert to invoice, get paid—all from your iPhone. Here are the iOS apps worth comparing and who each one fits.

Quick answer: If you want AI-drafted estimates that convert to invoices in one tap on iPhone or iPad, ContractorAI ($34.99/month after a 7-day free trial) is our pick. Invoice Simple (free plan, paid from $14.99/month) and Joist (paid plans from about $10–12/month) cost less for basic quotes and invoices, and Jobber (from $49/month) adds scheduling for teams. (ContractorAI is our product.)

Why Do Estimates and Invoicing Belong Together?

Using separate apps for estimates and invoices creates problems:

• Double data entry - Typing the same job details twice
• Version mismatches - Invoice doesn't match what you quoted
• Lost paperwork - Can't find original estimate when billing
• Slower payments - Delays between job completion and invoicing

The solution: One app that handles estimates AND invoices, with one-tap conversion between them.

Best Invoice & Estimate Apps for iPhone

ContractorAI (Our Pick for AI Estimates + Invoicing)

ContractorAI is an AI estimating, invoicing and CRM app for contractors, available for iPhone and iPad.

Price: $34.99/month with a 7-day free trial ($84.99 every 3 months or $349.99/year)

Estimate Features:

• AI estimate generator: describe the job in plain English (optionally attach photos) for itemized materials, labor and markup
• 20+ trade calculators (roofing, electrical, plumbing, HVAC and more)
• Branded PDF estimates sent by email
• Customer approval and e-signature
• Bid tracking (sent, viewed, accepted)

Invoice Features:

• One-tap estimate-to-invoice conversion
• Card payments via Stripe
• Client CRM with job history
• Receipt scanner and expense tracking
• Revenue, expense and profit reports

Why we like it: The AI-drafted estimate and the invoice live in the same app, so you convert an approved quote to an invoice in one tap—no retyping.

Invoice Simple

Price: Free Essentials plan (3 invoices/month); Plus $14.99/month; Premium $21.99/month

Pros:

• Very simple interface
• Basic estimates and invoices
• Low price point

Cons:

• General-purpose small-business invoicing, not built specifically for contractors
• Free plan is capped at a few invoices a month

Best for: Very basic invoicing needs only

Joist

Price: Paid plans from about $10–12/month (Basics) up to Run; 14-day free trial

Pros:

• Designed for contractors
• Low starting price
• Simple estimates and invoices

Cons:

• Focused on simple estimates and invoices rather than full job management

Best for: Very small contractors on tight budgets

Jobber

Price: Core $49/month month-to-month (about $29/month billed annually after an intro offer); plans up to $499/month; 14-day free trial

Pros:

• Full business management
• Scheduling included
• Client portal

Cons:

• Higher starting price than invoice-only apps
• Price climbs by tier as you add users and features

Best for: Larger service businesses needing scheduling

Feature Comparison Table

Prices checked September 2026 on each vendor's website; confirm current pricing before you buy.

How Does the Estimate-to-Invoice Workflow Work?

Here's how the best apps handle the complete billing cycle:

Step 1: Create AI Estimate

Describe the job; the AI drafts materials, labor, and markup. Review it and generate a branded PDF in minutes.

Step 2: Send & Get Approval

Email the estimate to the client. They review, approve and e-sign on their phone.

Step 3: Do the Work

Scheduling and job history keep track of what's booked and what's done.

Step 4: Convert to Invoice

One tap converts the approved estimate to an invoice. All line items transfer automatically.

Step 5: Get Paid

The client pays by card (ContractorAI uses Stripe), and the payment shows up in your records.

How Should You Handle Progress Billing on Large Jobs?

For bigger projects, you'll usually want progress billing rather than one invoice at the end:

• Agree milestones up front - e.g. deposit, rough-in, completion — and put them in the estimate
• Bill each phase as it's finished - don't wait until the end of the job
• Track what's paid vs. outstanding - so nothing slips
• Document change orders - get them approved before the work, then bill them

Check how any app handles deposits and partial invoices before you rely on it for large jobs.

How Do You Get Paid Faster?

Integrated estimate/invoice apps remove the usual delays between finishing a job and getting paid:

1. Invoice immediately - No delay between job completion and billing
2. Easy payment options - Clients can pay by card instead of mailing a check
3. Consistent follow-up - Check open invoices weekly and follow up promptly
4. Professional presentation - Clients take clean invoices more seriously

Tax Time Made Easier

All-in-one apps keep your records in one place for tax season:

• All estimates sent
• All invoices issued
• All payments received
• Expenses and scanned receipts
• Revenue, expense and profit reports

No more digging through email for old invoices.

Which App Should You Choose?

Choose ContractorAI if you:

• Want AI-drafted estimates
• Need trade-specific calculations
• Want quotes out the door quickly
• Want estimates + invoicing in one app
• Work on iPhone or iPad

Choose Invoice Simple if you:

• Only need basic invoicing
• Don't create complex estimates
• Want the cheapest option

Choose Jobber if you:

• Have a larger team needing scheduling
• Need dispatch and routing features
• Want a client self-service portal

Get Started Today

Stop using separate apps for estimates and invoices. Stop retyping data. Stop chasing payments manually.

Download ContractorAI and run your entire billing workflow from your iPhone:

1. Draft AI estimates in minutes
2. Get e-signatures on the spot
3. Convert to invoice in one tap
4. Take card payments via Stripe