21 tools.
One shared brain.

You log into Blacknave once. Whatever you log in any tool, the AI in any other tool can read, when relevant. So a question you ask in the Debt Payoff Planner can be answered with your real income from Budget Auditor, your subscription bill from Bill Manager, and your asset position from Net Worth + FIRE Planner, without you typing those numbers again.

You ask Gym Coach: “Should I deload this week?”

A standard answer says “check your sleep, fatigue, motivation.” The Blacknave answer reads from your other fitness tools first:

• From Body Comp: -2.4 kg over 6 weeks, currently 76 kg, fat trend down 1.1%.
• From TDEE & Macro: 500-cal cut phase, week 6 of 8.
• From Gym Coach itself: bench PR dropped from 82.5 kg × 5 to 80 kg × 5 in the last 2 weeks.

The answer it gives: “Yes, deload. The combination of 6 weeks in deficit, dropping bench PR, and a near-target weight loss tells me you've hit the floor of recoverable volume. Hold sets at -30%, eat at maintenance for 7 days, then re-cut from a fresher baseline.”

That answer is impossible if the three tools don't share data. With them linked, it writes itself.

You ask Debt Payoff Planner: “How much extra can I realistically apply?”

A standard tool says “enter a number.” You guess. Blacknave reads:

• From Budget Auditor: $4,800 take-home, $3,400 fixed costs, $298 average variable spend.
• From Bill Manager: $187/month in active subscriptions, two flagged as forgotten.
• From Debt Payoff itself: $890/month in minimum payments across 2 cards.

The answer: “True free cash flow is $612/month. You're applying $300 to debt, the other $312 isn't going anywhere structured. Bump the extra payment to $500. Cancel the two flagged subscriptions ($56/month) and apply that too. New debt-free date: Mar 2027 instead of Aug 2027. Five months saved.”

The Net Worth + FIRE Planner is the most cross-connected tool by design. To project a real FIRE date, the AI reads:

• Debt Payoff: liabilities total + payoff timeline.
• Investment Portfolio: current asset allocation + total value.
• Budget Auditor: savings rate from real budget percentages.
• Bill Manager: recurring obligations that lock in part of your monthly burn.
• Net Worth + FIRE itself: declared cash, real estate, income.

You enter data into each tool naturally as part of using it. The FIRE planner stitches them together into a number that updates without you re-entering anything.

Cross-product reads aren't a kitchen-sink. We curate which tools see which others. Examples of links we intentionally don't make:

• Gratitude Journal does not feed financial decisions.
• Gym Coach does not read your debt balance.
• Job Tracker does not see your meal plan.

The rule: only link tools when one's data genuinely changes the other's answer. Scope creep would dilute the signal and make the AI less specific, not more.

Your data lives in two places: localStorage on your device, and an encrypted Supabase row tied to your account. Cross-product reads happen in your browser. The compressed summary travels with the AI request you initiated. Nothing is stored externally for training or shared.

You can export every tool's data as CSV, and you can delete the entire account in one click from the Account page. That's the system, not a promise.

The cross-product effect compounds with how much you log:

1. Pick the tool that solves your most pressing question (debt? gym? FIRE?).
2. Use it normally for a week. Just log data, ask AI questions inside it.
3. In week two, open one related tool and add 3 data points. Watch the first tool's answers get sharper. That's the moment.

Browse the catalogue at all 21 tools.