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BiankbookAppendix · Features

Five things, done patiently.

We didn't ship a hundred features. We shipped the five that matter and spent the time on them. Here's what each one does, in more detail than the home page has room for.

  1. IRules
  2. IIAccounts
  3. IIIBudgets
  4. IVGoals
  5. VChapters
I · The rules engine

McMack remembers so you don't.

Rules are the one feature that makes Biankbook different. You log a transaction, McMack notices it's a repeat, and one tap teaches him the rule. From then on it lands in the right category on its own. Rules learn cadence (weekly, biweekly, monthly, irregular) and pause cleanly when you cancel a subscription.

14
rules in the demo
92
entries caught this month
<1s
to teach a new one
McMack's rules13 of 14 running
MatchCategoryCadenceCaughtOn
Acme PayrollIncomebiweekly8×
SpotifySubscriptionsmonthly4×
Whole FoodsGroceriesweekly22×
Apt 4B RentRentmonthly5×
LyftTransportirregular12×
EquinoxHealthmonthly4×
Adobe CCSubscriptionsmonthly1×
Paused rules keep their history. Flip one back on and McMack picks up where he left off.
II · Multi-account ledger

Checking, savings, credit, cash.

Biankbook tracks four kinds of money, as many of each as you want. We never connect to your bank. You enter the balance, we keep the running total, and transfers between your own accounts never count as spending or income.

4
account types
∞
of each, on paid plans
0
credentials stored
Balance sheetDec 14, 2025
Everyday Checking••4182$4,218
Rainy-Day Savings••9921$12,860
Cardinal Credit••0044 · limit $5,000−$842
Cash on Handmanual$120
Checking → Savings, Dec 1$800 · not spending
Net worth$16,356
III · Budgets & the In/Out chart

Spending you can read at a glance.

Set a monthly target on any of twelve categories. The bar fills in the category's color, and if you cross the target it turns coral. No alerts, no shame. Pair it with the In/Out chart, five months of income and spend side by side, and you'll see the rhythm of your life in about three months.

12
categories
9
budgets in the demo
5mo
rolling history visible
December pocketsTry crossing one
Groceries$484/ $500
Dining$320/ $400
Subscriptions$247/ $300
Transport$156/ $200
$80 left in Dining this month.
IV · Goals & forecast

Save toward actual things.

Pick a name, a target and a deadline, and tell McMack what you'll add each month. He works out how long it takes at your current pace, whether you'll make the deadline and how big the gap is. The Forecast view projects six months ahead across all your goals at once.

6mo
forecast horizon
1 tap
to contribute
0
fees on transfers
Six months aheadAt current pace
GoalDecJanFebMarAprMayJun
Emergency fundtarget $10,000+$800/mo$6.8k$7.6k$8.4k$9.2k✓ $10.0k✓✓
Japan, autumn 2026target $4,500+$340/mo$1.8k$2.1k$2.5k$2.8k$3.1k$3.5k$3.8k
New camera lenstarget $1,200+$100/mo$320$420$520$620$720$820$920

Gold cells are the month a goal reaches its target. Change a monthly add and the whole table moves.

V · Chapters & levels

End of the month becomes a moment.

On the last day of every month you close the chapter together. The book is sealed, and Biankbook summarizes what you saved, where it went and what McMack noticed. Log consistently and you level up: ten named levels, each a kind of attention.

10
levels to read for
30s
to close a month
1 PDF
per chapter, kept
LVL 1Apprentice★ CLOSED ★
LVL 2Note-taker★ CLOSED ★
LVL 3Bookkeeper★ CLOSED ★
LVL 4Quiet Saver★ CLOSED ★
LVL 5Even Hand· YOU ARE HERE ·
LVL 6StewardAHEAD
LVL 7Steady HandAHEAD
LVL 8Quiet PrideAHEAD
LVL 9Patient ReaderAHEAD
LVL 10Year ClosedAHEAD

Four chapters closed, the fifth in progress. Nothing unlocks at any level.

McMack the capybara — idle

That's all five. The rest is just you, writing.

Open your first chapter