Rex Instruments

Run the math before you brief the media buy.

Slide the inputs. The instrument recalculates customer acquisition cost, monthly revenue, and return on ad spend live, so a budget conversation starts with numbers instead of hope.

Recalculates instantlyNo email requiredBuilt in-house
rexdigital.com/resources/tools/growth-math
Customers / mo9.6
CAC$833
Revenue / mo$13,440
Breaking evenEvery $1 spent returns $1.68.
Browse by discipline
SEOAudit

Website Inspector

Inspect public technology, SEO, tracking, performance, security, accessibility, and conversion signals from one URL.

7 inspection modules
Open tool
SEOAudit

URL & Crawl Inspector

Audit redirects, indexability, robots.txt, XML sitemaps, broken links, duplicates, and crawl architecture.

Single URL, crawl, bulk
Open tool
SEOAudit

Domain, DNS & Email Inspector

Audit registration, DNS records, propagation, hosting clues, SPF, DMARC, DKIM, BIMI, MTA-STS, TLS-RPT, and DANE signals.

4 infrastructure sections
Open tool

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