Cash Book vs YNAB (2026): Envelope Budgeting vs Fast Logging

YNAB costs $109 a year. Cash Book costs $19.99 once. Those two numbers do most of the work on this page, and if the second one is all you needed, you are done.

They are not the same kind of product, though, and it is worth being clear about that before anyone declares a winner on price. YNAB is a budgeting method with an app built around it: link your bank accounts, let transactions import, assign every dollar to a category before you spend it, on the web, iPhone, iPad, Android and Apple Watch, behind an account. Cash Book is an iPhone expense tracker built around the moment of spending: say what you bought, snap the receipt, or let an Apple Pay tap log itself, with the record staying on your phone. Pick YNAB for the envelope method, automatic import and a plan your household shares. Pick Cash Book if logging should take one sentence and you would rather pay once.

Every YNAB fact here comes from YNAB's own website, pricing page, features page, privacy policy and App Store listing data, fetched on 12 September 2026. Where those materials leave a question open, it says so.

Feature by feature

The budgets row is where YNAB simply wins on ambition. Auto-Assign, spending and savings targets, a Loan Planner, and a method with a name and a following behind it. Cash Book's budgets are an allowance and some progress bars, and they are not trying to be more than that.

Two cautions about the table. "Not found" in the YNAB column means the feature did not appear in the pages we read, not that YNAB lacks it. And the Siri row is not like-for-like: YNAB's Siri updates the plan and reads out balances, while Cash Book's voice logging records a purchase.

Pricing side by side

All YNAB prices are from ynab.com/pricing and the US App Store purchase list, in US dollars, on 12 September 2026.

The sharing row changes the arithmetic more than anything else on the page. Split across six people, one YNAB subscription is about $18 each per year, which is under Cash Book's annual price. For one person it costs roughly two and a half times as much, and nothing on YNAB's side matches a $19.99 one-time purchase.

The trial comparison also goes YNAB's way: 34 days on ynab.com against seven in Cash Book. Whether those 34 days apply when you start from the App Store is exactly the kind of thing nobody documents.

How each one handles your data

YNAB is built on linked accounts. Its App Store description says you can "securely link financial accounts to automatically import transactions", and its privacy policy names Plaid and MX as the aggregators, with TrueLayer for UK users. An account with an email address is required. The policy states that "information from users based elsewhere will be transferred, processed, and stored in the United States", and that "we do not sell your Financial Data or any other information you provide through the Product", while noting that targeted-advertising activity may count as a sale or share under some state laws. The features page lists data encryption, two-factor authentication and an ad-free app. The developer-declared App Store privacy label lists purchases, financial info, precise location, email, phone number, user content, identifiers, usage data and diagnostics as data linked to you.

Cash Book's privacy policy is shorter because there is less of it. Transactions live on your iPhone and, if you switch it on, in your own iCloud account under Apple's encryption. No Cash Book account, no server holding your history. Voice clips and receipt photos go to an AI model through the studio's relay and are not kept. No contacts, no location, no ads, no data selling.

The cost of that is real and this page is not going to bury it. Cash Book cannot see your bank, so nothing lands in it unless you put it there. The detail is on the iCloud sync and privacy page.

Who should pick YNAB

• You want the envelope method, with every dollar assigned before it is spent, targets for goals and a loan planner. Recent App Store reviews describe it as habit-changing.
• You want transactions to arrive on their own from linked bank and card accounts, including Apple Card.
• You budget as a household. One subscription shares unlimited plans with up to six people, and this is the single strongest argument for the price.
• You move between a computer, an Android phone, an iPad and an Apple Watch and want one plan on all of them.
• You are happy to keep an account, have your data held in the United States, and pay $109 a year.

Who should pick Cash Book

• You would rather say "twelve euros lunch at Beshamel" than open a bank connection. See voice logging.
• You pay in cash, or at places your bank labels badly, and want receipt scanning to turn the paper into itemized transactions.
• You pay by phone and want Apple Pay auto-logging to record each tap with no bank login.
• You want no account, no email, and your history on your own phone.
• You want a simple allowance and per-tag budgets rather than a full envelope plan.
• You want to pay $39.99 a year or $19.99 once rather than $109 a year.

Choosing a system before an app? How to track expenses on iPhone covers the habits that matter regardless of the tracker, and the glossary explains envelope budgeting, the method YNAB is built around.

What we could not verify

• Whether YNAB exports to CSV or Excel. The support search page for "export" rendered empty, so it is not confirmed either way.
• Multi-currency support and scheduled or recurring transactions. Both very likely exist, but neither appeared in the pages we read.
• Receipt scanning or OCR, an Apple Pay or Wallet automation, and lock-screen widgets. None is mentioned in YNAB's materials.
• Whether the 34-day trial applies when you start from the App Store. The store description says one month.
• The full text of YNAB's privacy policy. Only a summary was obtainable.

The short version

YNAB is the bigger product and it has a method behind it: bank import, a household plan, five platforms, and years of people saying it changed how they handle money. Its trade-offs are structural rather than careless. An account. A US-hosted plan. A price that only really makes sense per household. Cash Book is the smaller product with one idea, which is logging so fast you actually do it, on a phone that keeps the data. Neither of those is a better app in the abstract. They are answers to different questions, and the question you are actually asking is the one to pick on. YNAB on its own terms is in the full YNAB review.

Get Cash Book on the App StoreFree for 7 days. $19.99 once for lifetime.

Get Cash Book on the App StoreFree for 7 days. $19.99 once for lifetime.