10 / Cost tool

Is this spreadsheet ready to become an app?

Inspect tables and fields locally, then sketch a more reliable way to work.

Private, browser-based calculation
02 / Your resultSample scenario
Private by design

A blueprint starts with your file.

Upload an Excel or CSV file, or explore the sample workbook. File contents never leave this browser.

Keep the reasoning, not just the number.

Assumptions and sources Checked 2026-10-14

Design sample, not a vendor quote. All prices, weights and questions come from the shared model. USD is the base currency; EUR uses an illustrative rate of 0.92. Totals are rounded to whole currency units. Prices exclude tax.

Build rates
Agency $85,000 · AI coding $42,000 · platform $28,000
Recurring costs
Flat platform $1,800/month. Annual seat discount 15%. See the result table for each seat and overage rate.
Questionnaire scoring
Yes 100 · unsure 40 · no 0. Equal question weights; unknowns never count as evidence.
Model provenance
App Build Index illustrative research model · 2026-10-14. Read the method →
Your full-report detail Answers & next steps
People editing this file
6
How often is it edited?
daily

Questions for your next conversation

  • Which assumptions change when you quote our exact use case?
  • Can you demonstrate the required controls and a complete export?
  • Who owns support, recovery and the transition at contract end?

This is the browser-generated report content. Print / PDF includes your result and its assumptions; email delivery is a placeholder.

A useful next step

Send me the full report.

Your results, your assumptions and the questions to take into a vendor conversation.

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Questions, answered

Before you decide.

Do I need an account or an email to see my result?

No. Your headline result appears immediately and updates as you change the inputs. Email is optional and only used if you ask for a report.

Are these vendor quotes or procurement advice?

No. This design edition uses clearly marked sample prices and weights. Use the assumptions panel to inspect the model, then get a written quote and verify controls with each vendor.

Where do my inputs go?

Calculations happen in your browser. A share link contains your answers, so share it only with people who should see them. The report form is a preview placeholder; it does not deliver email in this edition.

Sources & assumptions

  1. App Build Index sample research model, 14 October 2026. Prices and scores illustrate the interface and are not verified vendor offers.
  2. European Commission · AI Act framework. Reviewed 14 October 2026. Apply the rules to your exact use case with qualified advice.