DIGISIM.OBSERVATORY · category 18 — ledger
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category 18 · ledger

The numbers that run the world.

Markets and macro-statistics, pulled from free public feeds and rebuilt as instruments: exchange rates strung into a web, the top hundred coins as a heatmap that breathes with the market, two centuries of wealth and lifespan racing across a bubble field, and the barcode on your snack decoded into a verdict.

apps live 10
in design 0
opened 05·29
LEDG-001 · LIVE running
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featured · live now
DeFi TVL

A live leaderboard of decentralized-finance protocols ranked by the value locked inside them — total DeFi capital, charted and falling in real time.

ledgerdeficrypto
2026-06-05 /ledger/defi-tvl
in this section · 20 apps
LEDG-002 live
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Inequality (Gini)

A live atlas of income inequality — the Gini index of every reporting nation, ranked most-equal to most-unequal, with the canonical Lorenz curve drawn from the share held by the richest and poorest tenths.

ledger /ledger/wealth-gini
LEDG-003 live
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Remittance Rivers

A live view of money sent home by migrant workers — who receives the most dollars, and the small nations where remittances are a third of the whole economy.

ledger /ledger/remittance-rivers
LEDG-004 live
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Military Spending

A live view of global military expenditure — the giants that spend the most dollars, and the tense, embattled states that pour the largest share of their economy into defense.

ledger /ledger/military-spending
LEDG-005 live
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Government Debt

A live ledger of what nations owe — central-government debt as a share of GDP, ranked, banded by sustainability, and traced year by year as the lines climb past 100%.

ledger /ledger/government-debt
LEDG-006 live
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Foreign Aid

A live view of Official Development Assistance — who receives the most aid dollars, and the fragile, small states where aid is a quarter or more of national income.

ledger /ledger/foreign-aid
LEDG-007 live
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Energy vs GDP

A live scatter of every nation plotting energy use against economic output — the iron correlation of wealth and watts, and the outliers who break it.

ledger /ledger/energy-vs-gdp
LEDG-008 live
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Bitcoin Mempool

A live fee-weather board for the Bitcoin mempool — recommended sat/vB tiers, the congestion histogram, the unconfirmed backlog, and the latest mined blocks, straight from mempool.space.

ledger /ledger/bitcoin-mempool
LEDG-009 live
Currency Web

Live exchange rates strung into a radial web — a base currency at the hub, twenty more on spokes, each pluckable for a year of history.

ledger /ledger/currency-web
LEDG-010 live
Coin Heat

The top hundred cryptocurrencies as a live treemap that breathes with the market — sized by market cap, glowing green or red with the tide.

ledger /ledger/coin-heat
LEDG-011 ready
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Unemployment

Jobless rates traced across the business cycle for two dozen nations — a sweeping multi-line chart where the 2009 crash and the 2020 pandemic spike together.

ledger /ledger/unemployment
LEDG-012 ready
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Trade Openness

An animated bar-chart race of how globalized each economy is — trade as a share of GDP — where tiny open city-states tower over vast continental giants.

ledger /ledger/trade-balance
LEDG-013 ready
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Productivity Race

An animated bar-chart race of output per worker across two dozen nations, tracing who leapt ahead and who plateaued since 1991 in constant PPP dollars.

ledger /ledger/productivity
LEDG-014 ready
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Lemonade Stand

Run a one-stand micro-economy: set price and batch size, read the weather, and hunt the profit-maximizing point where the demand curve and your costs agree.

ledger /ledger/lemonade-stand
LEDG-015 ready
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Inflation Tracker

A sweeping multi-line chart of consumer-price inflation across two dozen economies — from steady single digits to the vertical screams of hyperinflation.

ledger /ledger/inflation
LEDG-016 ready
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GDP Race

An animated bar-chart race of the world’s largest economies, tracing six decades of fortunes rising and falling in current US dollars.

ledger /ledger/gdp-race
LEDG-017 ready
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Debt to GDP

An animated bar-chart race of central-government debt burdens, watching nations swell green-to-red as their borrowing crosses the weight of their own economies.

ledger /ledger/debt-clock
LEDG-018 ready
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Compound Interest

Watch the snowball form: an animated balance curve where interest quietly overtakes your contributions and the line goes vertical.

ledger /ledger/compound-interest
LEDG-019 ready
Nutrition Decoder

Search a packaged food or scan a barcode and watch its real label decode into an honest dashboard — Nutri-Score grade, NOVA processing tier, and a radar of what is actually inside per 100g.

ledger /ledger/nutrition-decoder
LEDG-020 ready
Gapminder, Live

Every country as a drifting bubble — wealth against lifespan, played forward from 1990 to 2022 on live World Bank data.

ledger /ledger/gapminder
LEDG-021 ready
Development Race

A bar-chart race of the world’s leaders — population, wealth, carbon and connectivity sorting and overtaking each other from 1990 to 2022 on live World Bank data.

ledger /ledger/development-race
ledger · category 18 ← back to observatory