Comparison
PreCal-IQ vs. OnScreen Takeoff (ConstructConnect)
OnScreen Takeoff (OST) has been a staple of commercial estimating for over a decade. Its workflow — upload PDFs, point-and-click measurement, integrate with Quick Bid for pricing — is the workflow most estimators learned takeoff on. ConstructConnect has added AI features (Takeoff Boost) on top of that foundation. PreCal-IQ is built differently from the ground up: the AI extracts the takeoff from the source documents, and the estimator reviews rather than measures.
Bottom line
OnScreen Takeoff is a long-established digital takeoff tool from ConstructConnect — a familiar workflow built around manual click-to-measure with AI assist ("Takeoff Boost") for some measurement steps. PreCal-IQ replaces the manual workflow entirely: AI reads the spec book and plans together and generates the takeoff in one pass.
Feature comparison
Side-by-side
| Feature | PreCal-IQ | OnScreen Takeoff |
|---|---|---|
| AI extraction | Yes — generates the takeoff from spec + plans | AI assist on top of manual measurement (Takeoff Boost) |
| CSI spec book parsing | Yes — every line item from every section | No — drawing measurement tool |
| Drawing measurement | AI vision parses drawings and schedules | Point-and-click measurement (faster with AI assist) |
| Spec ↔ plan cross-reference | Every line item tied to spec section + drawing location | Estimator manages cross-reference |
| Time to first takeoff | 15–30 minutes | Hours to days, depending on project complexity |
| Bid integration | Built-in bid builder + Excel export | Integrates with Quick Bid for estimating |
| Vendor pricing portal | Built-in | Not included |
| Starting price | $499 / mo (Starter plan) | From ~$15 / user / mo (basic tier) |
In practice
How each holds up under real workflow
A long-time OST estimator with templated workflows that already work
If your team has decades of OST muscle memory, deep customization, and a Quick Bid setup that produces accurate numbers — the switching cost to any new platform is real. OST gets the job done. PreCal-IQ's value comes from replacing the manual measurement step entirely, which is the step OST optimizes rather than eliminates.
A GC trying to scale bid volume without scaling estimator headcount
OST + Quick Bid scales linearly: more bids means more estimator hours measuring and pricing. PreCal-IQ's leverage is the AI extraction step — one estimator can produce more takeoffs because the manual measurement step is replaced, not assisted.
A fast-turnaround bid where the spec book changes mid-process
In OST, a spec revision means re-reading the spec, identifying changes manually, and updating measurements in the takeoff. PreCal-IQ re-runs the entire takeoff against the new spec and surfaces deltas as a list of changed line items.
FAQ
Common questions
Does Takeoff Boost in OST do the same thing as PreCal-IQ?
Takeoff Boost is AI assist on top of manual measurement — it speeds up specific measurement actions on drawings. PreCal-IQ's AI generates the takeoff from the source documents (spec + plans), which is a different model. Boost makes the estimator faster; PreCal-IQ replaces the manual measurement step.
When is OST the better choice?
When your team is already deep on OST and Quick Bid, has years of templates and customizations, and your bid economics work at current volume. The transition cost from a mature OST shop to any new platform is real and shouldn't be downplayed.
Can I export from PreCal-IQ into Quick Bid?
PreCal-IQ exports structured Excel takeoffs that can be loaded into most downstream estimating tools, including Quick Bid. We don't have a native Quick Bid connector today, but the Excel export carries the same columns most teams need.
How does PreCal-IQ pricing compare to OST?
OST starts at about $15 per user per month for the basic tier; full-feature plans and Quick Bid integration are higher. PreCal-IQ Starter is $499/month and Professional is $1,499/month for three users including unlimited takeoffs. PreCal-IQ wins on per-takeoff cost when bid volume is meaningful.
See PreCal-IQ side-by-side with OnScreen Takeoff
Bring your own spec set to a 30-minute demo. See the takeoff generated live on your project.