Frequently asked questions
Marketing analytics, newsletter calculators, privacy, and affiliate disclosure — answered in one place.
What is Mangrove Tools?
Mangrove Tools offers free, in-browser marketing analytics tools for small businesses and founders. Newsletter calculators are supporting tools for creators. Each tool does one job well. Calculations run in your browser. No accounts. No hard paywall on results.
Are the tools free?
Yes. Core marketing analytics tools and newsletter calculators are free to use with no account and no hard paywall on results. Some newsletter calculator pages may include optional affiliate links after a tool has been useful.
Do tools send my data anywhere?
No. Marketing analytics and newsletter calculator inputs stay in your browser — they are never sent to Mangrove Tools servers. The site uses Google Analytics for aggregate traffic measurement. See the privacy page for details.
What tools does Mangrove Tools offer?
Marketing analytics tools: Budget Advisor (marginal ROI and budget allocation) and Revenue Forecaster (trend and seasonality projections). Supporting newsletter calculators: LetterROI (revenue calculator), SponsorQuote (sponsorship rate calculator), SubTarget (paid subscriber goal), Media Kit Composer, and Inventory Planner.
What is the Budget Advisor?
Budget Advisor is a marketing budget optimizer that fits power-law response curves to your historical spend and conversion data, computes marginal CPA per channel, and recommends an optimized budget allocation. Enter spend and conversions by channel, set a total budget, and the tool simulates the best allocation.
What is the Revenue Forecaster?
Revenue Forecaster detects trends and seasonal patterns in your historical revenue or conversion data and projects future outcomes with uncertainty ranges. You can test growth targets and see the probability of hitting them based on current trajectory.
How accurate are the analytics tools?
The analytics tools use statistical approximations — not full enterprise marketing mix models. They work best with 6+ months of clean historical data across 3+ channels. Results include confidence indicators and clear guardrails so you know when the data is too thin for reliable estimates.
What newsletter platform do you recommend?
Beehiiv is a strong option for creators who want growth tools, programmatic ads, and paid tiers in one place. The LetterROI calculator includes an affiliate link to start free on Beehiiv.
Is there an affiliate disclosure?
Some calculator pages include affiliate links. If you upgrade or sign up through those links, Mangrove Tools may earn a commission at no extra cost to you. This is how the site is sustained.
How do I contact Mangrove Tools?
Use the contact page to reach out. Best for tool questions, partnerships, or feedback. Response time varies.