CompoundVision is an independent project run by one developer. This page describes how the calculators and content actually get built — what runs in your browser, how each tool is verified, how the YMYL disclaimers work, and what the site does and doesn't do.

What runs in your browser

Every calculator on the free tier runs entirely client-side: the inputs you type are processed in your browser and never reach a server. There is no upload step in the calculator path.

The optional Pro tier adds encrypted multi-device sync, live portfolio prices, and DeFi/staking trackers. When sync is enabled, your portfolio data is end-to-end encrypted in the browser before being sent to the sync server — see the Privacy Policy for the encryption details. Live prices come from third-party APIs (CoinGecko for crypto, cached up to 5 minutes); the requests carry the asset symbol, not your portfolio.

Ads on the free tier come from Google AdSense (publisher ID ca-pub-8761907366448308). AdSense uses cookies and shares limited data with Google's ad network when you consent. The cookie banner is a real consent gate: AdSense scripts do not load until you accept. If you decline, no ad cookies are set. Ad slots are clearly marked Sponsored.

How tool reliability is verified

Every calculator is covered by an automated end-to-end test that runs on every deploy. The "Last verified — N calculators passing" line in the footer is set by CI: it reflects the date of the last green run and the count of calculators that passed. If a test breaks, the footer reflects that on the next build, and the broken tool is fixed before the line goes back to all-passing.

How content is written

Calculator formulas are written and verified by hand against primary sources: Bengen (1994) for the 4% rule, the Trinity Study (1998) for safe withdrawal rates, Modern Portfolio Theory for rebalancing logic, the Fisher equation for real-vs-nominal returns, and the standard amortization equation for loans and mortgages.

Long-form guides under /docs/ are drafted with AI assistance and lightly reviewed before publishing. The technical facts in those guides — what a study said, how a formula derives — are independently verifiable.

Comparison pages ("X vs Y") were previously published with light review. They have been removed because the project couldn't maintain the factual bar they required without becoming a competitor-review site, which isn't what CompoundVision is. If a comparison page redirected you here, please use the actual products to compare them.

YMYL — finance calculators

CompoundVision is a finance site, so most pages are YMYL ("Your Money or Your Life") content. Each calculator names its limits:

• Per-tool disclaimers. All 22 finance calculators (compound interest, DCA, APY, breakeven, currency converter, dollar-to-crypto, impermanent loss, inflation, risk-reward, rule of 72, savings goal, trade profit, FIRE, loan, mortgage, leverage, liquidation price, staking rewards, debt payoff, dividend, portfolio ROI, rent-vs-buy) render a disclaimer naming the specific factors they don't model — for example, FIRE names sequence-of-returns risk and inflation regime; mortgage names PMI/HOA/property tax that typically add 25–40% above amortization; leverage names funding rates and liquidation cascades.
• Source-cited formulas. Where the calculator implements a published method, the page names the year and primary source (Bengen 1994 SAFEMAX; Trinity Study 1998; constant-product AMM model for impermanent loss; Fisher equation for real-vs-nominal).
• Not advice. These are educational calculators. They don't replace consultation with a licensed financial advisor for individual decisions. The site does not currently route YMYL content past a CFA-licensed reviewer; if that changes, this page will be updated and the affected tool pages will name the reviewer.

What the site doesn't do

• Paid placements, sponsored editorial, or guest posts. AdSense ads are clearly marked Sponsored and separate from editorial.
• Affiliate revenue from broker/exchange referrals.
• Make financial claims dressed up as advice. Calculators are calculators; each names what it is not for.

How content stays current

When a regulation, study, or vendor spec changes in a way that affects a calculator (a new safe-withdrawal-rate study, a tax-rule change, an exchange-specific liquidation mechanic), the affected page is updated. The CI test suite catches behavioral regressions on every deploy, and visible errors are fixed on the next deploy.

Reporting errors

If you spot a factual error, a broken tool, a missing citation, or content that's outdated, email support@compoundvision.app. The operator typically replies within 24 hours on weekdays. Substantive corrections are published with a Corrected YYYY-MM-DD note next to the affected paragraph.

Funding and monetization

The free tier of CompoundVision is funded by Google AdSense display ads (where approved). The optional Pro tier adds encrypted sync, live prices, DeFi/staking trackers, and an ad-free experience. Monthly and annual subscriptions are paid via Stripe (cards); multi-year subscriptions (1, 2, or 3 years) can also be paid via cryptocurrency.

The site accepts no payment for tool listings, no affiliate revenue from broker/exchange links, and no sponsored editorial content. Ad slots are clearly marked Sponsored and separate from the rest of the page.