RFIs, drawings and punch lists.
On one project.

Requests for information, submittals, the drawing register, punch lists, meeting minutes, change orders, pay applications and sealed bids, on the same project as your schedule, your team and your invoices.

Join STAK free See pricing

AI inside the work you already do.

See every AI feature

The owner and the team at work, with the real STAK screen on the device — Construction management

No account needed for architects or subcontractors
Bid prices sealed until closing
Pay applications exact to the cent
Site work in 34 staff languages

What it does

Requests for information (RFIs)
- Send each RFI to one person, with an answer-by date taken from your project’s house rules.
- See who has the ball: the author, the person asked, or nobody.
- Record the cost and schedule impact, the spec section, the sheet and the priority.
- Every answer is signed and kept in a history that cannot be edited.
Submittals
- Reviewers in order, each with a due date that starts on their turn.
- Approved, approved as noted, revise and resubmit, or rejected, and a decision cannot change afterwards.
- The last day to send is worked out from the date needed on site, the supplier’s lead time and the review days.
- Every round is kept as a new revision.
Drawing register and issued sets
- Sheets, disciplines and revisions that never change once saved.
- An issued set freezes the exact revisions sent, shows what changed since the last issue and who confirmed receipt.
- Markups on the sheet (pin, arrow, box, cloud, text, pen) stay in place at any zoom.
- A set built on an old revision is refused before it goes out.
Punch lists
- Items with place, trade, owner, date and priority, before and after photos, and a pin on the sheet.
- The trade marks an item fixed with a photo from its own link; only your team signs it off, by name.
- One walk-through adds up to 60 items, with a summary per owner and the percent signed off.
Change orders and pay applications
- Owner change orders with amounts (credits allowed), days added and the linked RFI; an approved order is frozen.
- Pay applications on a schedule of values, with retention, stored materials and work to date, in exact arithmetic.
- Certify a pay application, then invoice the certified amount to the client in one step.
Bids and prequalification
- Bid packages with scope items, estimates, invited bidders and a due time.
- Sealed: nobody sees a price while the package is open, and prices cannot change after closing.
- Bids levelled on the same scope, ranked, with the gap to the lowest and to the estimate.
- An award is refused when the subcontractor’s required papers are not verified and valid today.
Meetings and safety
- Meeting minutes with attendees and action items that carry into the next meeting until they are done.
- Safety observations with severity and photos; a serious finding closes only with a written corrective action.
- Toolbox talks with attendees and signatures, kept as evidence.
A private link for every outside party
- Client, architect, engineer, subcontractor, supplier or authority: each gets a link that needs no account.
- Valid from 1 to 365 days, and you can withdraw it at any time.
- Each party sees only what waits for them, and every act is signed with their name.
Site work from a phone
- A foreman records a defect, a fix, a safety observation or a toolbox talk from a phone.
- In Arabic, English, Hindi, Urdu, Malayalam, Bengali, Tagalog and Nepali.

Who it is for

General contractors
Subcontractors and specialist trades
Fit-out and interiors companies
Developers and project owners
Consultants and project managers

Good questions

Do architects and subcontractors need a STAK account?

No. Each outside party gets a private link that needs no account. You choose how long it lasts, from 1 to 365 days, and can withdraw it at any time.

Which STAK app do I need?

The construction tools are part of the Projects app, a main app that can be your one free app, forever.

Can I invoice from a pay application?

Yes. Once you certify a pay application, STAK invoices the certified amount to the project’s client, one invoice per application.

How are drawings shown?

Upload a PDF or a picture, and STAK shows each sheet as an image of up to 1,600 pixels on its long side, enough to read and mark up. The original file stays with you, with its fingerprint and an optional link.