Keep the Diff: Save Money

Keep the Diff: Save Money

Spend less without a budget

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Free
In-App Purchases

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Details

Released
September 11, 2026
Updated
October 28, 2026

Features

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About

Keep the Diff gives you credit for money you decided not to spend. You talk yourself out of things all the time, and nothing keeps a record of those choices, so they never feel like progress. Keep the Diff keeps that record. PLANNED SPEND MINUS ACTUAL SPEND EQUALS THE DIFF It comes down to two numbers: 1. What you were ready to spend. The dinner you nearly ordered, the jacket in the tab you closed. 2. What you actually spent. Often nothing. There is a "Didn't buy" button for the common case. The difference is yours. It adds up by week, by month, and toward whatever you are saving for. PLAN IT BEFORE YOU SPEND IT Plan a spend is the other way round: put in what you are ready to spend on something coming up, pick later today, tomorrow morning or in three days, and get on with your evening. When that time comes the app asks what you actually spent, and the Diff is the gap. Until then, a countdown on Home and on the Lock Screen shows when the question is coming. One switch in Settings turns the countdown off. Planning and answering are part of Classic. YOU DECIDE WHAT COUNTS There is no budget to keep and no challenge to pass. Keep the Diff never tells you what to spend, never links your bank account, and never shows you a red number. NOT SURE YET Not sure about a purchase? Add the item and its price to the Not sure yet list, and pick when to be asked again: tomorrow, in a few days, or in a month. When the time comes, skip the purchase and the Diff is yours, or buy the item with nothing lost. Classic keeps one item at a time; Plus keeps as many as you like. THE 52 WEEK CHALLENGE Make a goal a 52 week savings challenge. Pick the weekly step and whether to start small or start big, and the goal card shows how you are doing against the plan each week. Falling behind never resets anything. YOUR YEAR IN REVIEW Each December and January, a card sums up your year: the total you kept, how many Diffs, your biggest skip, and the goals you reached, with your goal photo. Share the card if you like. Part of Classic. WHAT CLASSIC INCLUDES Logging decisions is part of Classic. So is this week's total, your recent history, and the weekly recap you can share. So is choosing the currency you think in, fifteen of them, each in its own format. Your milestones are marked as you reach them, and you can share one. WHAT PREMIUM ADDS - Your full history, with CSV export - Categories and breakdowns - Goals, with a photo of the thing you are saving for, and a projected pace toward each one - Recurring Diffs, so a canceled subscription counts every month, for up to a year - Sync across every device you sign in on - Widgets, including one for each goal and a large widget, Lock Screen entry, and the watch app - The Mac app - App Lock: Face ID, Touch ID or your passcode in front of your numbers NOW IN 21 LANGUAGES Keep the Diff speaks your language. YOUR MONEY STAYS YOURS TO KNOW ABOUT Keep the Diff does not connect to your bank. You never link an account, hand over a bank password, or share a transaction feed. An account is optional, and logging never needs one. If you sign in and turn on sync, your ledger is encrypted on your device before it leaves, so we never see anything you write down. No analytics, no tracking. PREMIUM SUBSCRIPTION Keep the Diff Plus is $33.99 per year or $6.99 per month. New installs also get 3 days of Plus to try first. Plus Lifetime is a one-time purchase of $91.99. Payment is charged to your Apple Account at confirmation of purchase. The subscription renews automatically unless auto-renew is turned off at least 24 hours before the end of the current period, and your account is charged for renewal within 24 hours before the period ends. Manage the subscription, or turn off auto-renew, in your Apple Account settings after purchase. Privacy policy: https://keepthediff.com/privacy Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
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What's New in Keep the Diff

1.4.0

October 28, 2026

NOT SURE YET Park a purchase you are unsure about and get asked again later. Skip the purchase and the Diff is yours. 52 WEEK CHALLENGE Turn a goal into a 52 week savings challenge, starting small or starting big. YEAR IN REVIEW Each December and January, a card with the total you kept this year, your biggest skip and the goals you reached. Part of Classic. LARGE WIDGET A large widget with your goal photo, this week, or all your goals. Part of Plus. A NEW LOOK A calmer green palette and a new welcome guide that sets up your first goal and your first Diff. SAFER SIGN-IN Sign in with a passkey, and approve a new device from one you already use.

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Subscriptions & In-App Purchases

Plus Monthly

Your whole history, goals, widgets, watch and desktop.

$6.991 Month
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