Is Opora really free?

Yes. Every calculator on the tools hub runs without an account, without a card, and without a daily run limit. There is no paid tier, no trial clock, and no feature that stops working after a set number of uses.

Then why would I create an account?

An account saves your work. Bid artifacts, saved results, run history, and the full Opora Edge AI apps are tied to a login. Everything else works signed out.

How many tools are there?

Thirty-nine calculators and generators on the tools hub, plus fourteen Edge AI apps for bid drafting, RFP decoding, margin review, and compliance checks.

Where do the numbers come from?

Wages come from BLS OEWS. Disinfectant and chemical data comes from EPA registrations and List N. Safety requirements are cited to the CFR section.

No. Calculations run in your browser. We record that a tool was run, but not the values you entered.

Frequently Asked Questions

Straight answers about what Opora costs, where the numbers come from, and what we do with your data. If anything here contradicts another page on this site, the mistake is ours — email [email protected] with Correction in the subject line.

Cost and accounts

Is Opora really free?: Yes. Every calculator on the tools hub runs without an account, without a card, and without a daily run limit. There is no paid tier, no trial clock, and no feature that stops working after a set number of uses.
Then why would I create an account?: An account saves your work. Bid artifacts, saved results, run history, and the full Opora Edge AI apps are tied to a login. Everything else works signed out. Creating an account costs nothing and does not require a card.
What is the catch?: None that we are hiding. The tools and the research exist to build a relationship with operators who will consider Opora when we do have something to sell. In the meantime you are not paying for this, and you are not the product either — we do not sell usage data. See the privacy policy for the specifics.

Tools

How many tools are there?: Thirty-nine calculators and generators on the tools hub, grouped by the job they do: winning work, running work, making money on it, and staying compliant. Fourteen Edge AI apps sit alongside them for bid drafting, RFP decoding, margin review, and compliance checks.
Where do the numbers come from?: Wages come from BLS OEWS and the Occupational Outlook Handbook. Production rates come from ISSA 447. Disinfectant and chemical data comes from EPA registrations and List N. Safety requirements are cited to the CFR section rather than to "OSHA says". The sourcing rules are on the methodology page, and what we will and will not cite is set out in our editorial standards.
How current is the data?: Wage and benchmark data refreshes on a weekly schedule and picks up the BLS release cycle automatically. Regulatory and state pages carry a visible last-reviewed date. If a page that should have a date does not, treat that as a gap and tell us.
Can I use the output in a real bid?: Operators do, every day. Treat it the way you would treat a second estimator's number — a check on your own math, not a replacement for it. A calculator does not know your crew, your equipment, your travel time, or the condition of the building. Anything you send to a client is your number, not ours.
A calculator gave me a result I think is wrong.: Email [email protected] with the inputs you used and the result you expected. If the logic is wrong we fix it and note the change; if the logic is right we will show you the arithmetic. Both outcomes are useful to us.
What makes a tool give me a better answer?: Input quality. Square footage, scope detail, crew size, frequency, and location are the fields that move a result most. Vague inputs produce vague outputs — the same as they would with a human estimator.

Research and editorial

Who writes the Field Guide?: The Opora editorial team, working to the standards on our editorial process page. We publish under one masthead rather than individual bylines, and every claim links to the source it came from so you can check the work rather than take our word for it.
Do you accept guest posts or sponsored content?: No. Nothing on this site is paid placement and no manufacturer has editorial input. Where we name a product, it is because the product belongs in the comparison.
Can I quote or reuse Opora research?: Yes, with attribution and a link back to the page you took it from. To reproduce a full table or a substantial section, email [email protected] with Press in the subject line.

Privacy and data

What happens to the numbers I type into a calculator?: Calculations run in your browser. We record that a tool was run, so we know which tools are worth maintaining, but not the values you entered. Artifacts you save to an account are stored against that account and are not shared.
Do you sell data?: No. The full detail is in the privacy policy, and our handling practices are described on the security page.

Getting help

How do I reach a person?: Email [email protected]. Use Correction in the subject for a factual dispute, Security for a vulnerability disclosure, and Press for media or partnership enquiries. They reach the same inbox and get routed from there.
The site is down or responding slowly.: Email [email protected] with the subject line Service issue, roughly when you saw it, and your general location. That is usually enough for us to tell whether the problem is regional.