Grainwork
Second opinion on repair costs
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Film any home repair and get an independent estimate in about a minute — then check your contractor's quote against it. No salesman, no leads sold. Just the number.
Is your contractor's quote fair? Find out in about a minute.
You just got a repair quote and you have no idea if it's reasonable. Too low and you worry about the work; too high and you're overpaying by thousands — and you have no neutral way to tell. Grainwork is that neutral read. Film the damage and we build an independent estimate from your footage; then enter the contractor's quote and we check it against that estimate, line by line.
You'll see in about a minute:
- A clear read on your quote — shown side by side with an independent estimate range, so you can see for yourself where it lands
- An independent estimate built from your own photos or video
- A line-by-line read on which items look inflated and exactly what to ask your contractor — unlock the full breakdown when you're ready to act
We're on your side — and we mean it structurally. We take no money from contractors. We sell no leads. There's no "now hire someone" pitch after the verdict. Most "find a pro" apps are paid by the pros; ours isn't, so the number has no agenda. It's just the number.
Works for any repair — roof, HVAC, plumbing, paint, drywall, siding, concrete, and more. Estimates are built against local repair-cost data and calibrated with real contractors, not contractor advertising.
And it remembers. Every check becomes part of your home's record — a plain-English history of what's been looked at, in a calm voice, kept for you. Not a sales funnel. A record.
Free to see your estimate and the verdict. Unlock the line-by-line audit when you want the full breakdown — getting three bids on one job? The audit 3-pack covers all of them.
Grainwork provides an independent estimate for informational purposes. It is not a formal bid, appraisal, or guarantee of price. Always confirm with a licensed professional.
The developer, Ryan Katzman, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Purchases
- Location
- Contact Info
- User Content
- Identifiers
- Usage Data
- Diagnostics
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Purchases
- Location
- User Content
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Ryan Katzman
- Size
- 50.3 MB
- Category
- Utilities
- Compatibility
Requires iOS 15.1 or later.
- iPhone
Requires iOS 15.1 or later. - iPod touch
Requires iOS 15.1 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Bid Check 3-Pack $19.99
- Bid Check - Full Breakdown $9.99
- Copyright
- © 2026 Grainwork