You can use formulas, lookups and pivot tables to calculate results in Google Sheets™. Or, you can upload it in ChatGPT™, ask a question in plain English and get the answer without knowing how it was calculated. What if you could ask a question in plain English and see how it was calculated step by step?

Prereasoner lets you ask a question in plain language, review the answer, and inspect the source rows and reasoning behind it. Your source spreadsheet stays unchanged, while each calculation can be inspected step by step as sheets.

❇️ Features

➤ Ask questions in plain language
Ask “What is the total amount in France in US dollars?” or “Which products had the highest sales?” No formulas or query language to learn.

➤ Inspect every answer
See the answer, supporting rows and step-by-step reasoning together, so you can check how each result was produced.

➤ Analyze multiple tabs
Prereasoner reads visible, non-empty tabs in the current spreadsheet and can connect related records across sheets.

➤ Look up missing context
Your sheet has cities, but your question asks by country or currency. Prereasoner can add the exact geographic or currency context needed to answer.

➤ Continue with follow-up questions
Ask another question without rebuilding the spreadsheet context. The conversation stays connected to the original analysis.

➤ Reopen previous conversations
Choose Extensions → Prereasoner → Previous conversations to open saved analyses directly in Prereasoner.

➤ Keep source data unchanged
The add-on reads the current spreadsheet only when you ask a question. It never edits spreadsheet cells.

❇️ Why Prereasoner?

➤ Answers you can audit
Don't accept a number from a black box. Review the reasoning and source rows behind every answer.

➤ Native to Google Sheets™
Start from the Extensions menu and analyze the spreadsheet already open in your browser.

➤ Built for real spreadsheet work
Filter rows, join tabs, group records, calculate totals and ratios, rank results, and enrich data with exact lookups.

❇️ Use cases

Sales analysis: Calculate revenue by country, product, customer or time period and inspect the rows behind each total.

Operations reporting: Summarize orders, inventory, delivery performance or service data without building formulas manually.

Finance checks: Calculate totals, ratios and currency conversions while keeping the calculation steps visible.

Data enrichment: Connect cities to countries, products to categories, or records across related worksheet tabs using exact identifiers.

Management questions: Ask follow-ups, compare segments and reopen previous conversations when you need to explain or revisit a result.


❇️ Pricing

Start free with 50 questions per month. Paid plans start at $18 per month when billed annually. For details, visit:
https://prereasoner.com/sheet-copilot/pricing.html

Privacy: https://chat.prereasoner.com/privacy
Terms: https://chat.prereasoner.com/terms
Support: https://chat.prereasoner.com/support

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