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Keep the Diff Premium

Annual, pay now

Best Price
$2.33/month
Save 41%

Billed annually, at this price for as long as you renew.

Annual

First Week Free
$2.92/month
Save 26%

7 days free, then billed annually.

Lifetime

Pay Only Once
$79.99

One payment for every Premium feature, now and later, on up to 10 devices.

Monthly

$3.99

Cancel any time. Nothing is locked in.

One subscription unlocks Premium on Apple, Android, and Windows.

What Free and Premium each include
Feature Free Premium
Logging decisions Unlimited Unlimited
This week and this month ✓Included ✓Included
History Last 14 days Everything, however far back
CSV export ×Not included ✓Included
Categories and breakdownsCategories you chose while free are kept, and they light up the moment you upgrade. ×Not included ✓Included
Goals, each with a photo One As many as you like
Milestones, with a card to shareYour first $100 kept, your 10th better decision and more, marked as you reach them. ✓Included ✓Included
This year at your paceAfter four weeks, what your Diffs add up to over a year. ✓Included ✓Included
Time to goal, for each goalAbout when you will reach it, at your recent pace. ×Not included ✓Included
Recurring DiffsCanceled or downgraded a subscription? Log it once and it counts every month, for up to a year. ×Not included ✓Included
Weekly recap card ✓Included ✓Included
Home screen widgets, one for each goal, and the Lock Screen entry ×Not included ✓Included
The watch app and a goal on your watch face, on Apple Watch and Wear OS ×Not included ✓Included
Dark mode and adjustable text size ✓Included ✓Included
Bank connection, ads, tracking None, ever None, ever

How sync works, free and Premium

On the free version, your entries are kept on the device you logged them on. On Apple and Android they are included in your own iCloud or Google device backup, the same as any other app's data. Nothing moves between your devices, and Windows has no free backup of any kind.

Premium's sync connects them. Sign in, turn on Sync across your devices in Settings, and your ledger follows you between Apple, Android, Windows and Linux. Each device encrypts the copy before it leaves, so we cannot read it. A new device is handed the key by one of your other signed-in devices, so there is no recovery code to lose.

Buying here or in a store

You can subscribe here, or inside the app on iPhone, iPad, Mac and Android and pay through your store account.

Paying on this page starts from Keep the Diff on your Mac or PC: click Premium there, and the app unlocks itself the moment the payment lands.

Wherever you buy Premium, one subscription unlocks Premium on your iPhone, iPad, Mac, Apple Watch, Android phone, Wear OS watch and Windows PC.

Already subscribed to Premium?

Bought on the App Store or Google Play. Premium follows your store account. After a reinstall or on a new phone, use Restore purchases on the Premium screen.

Want Premium on another platform too? On the device you subscribed on, open Settings, go to Account and sign in with Apple, Google or your email. Then sign in the same way on your other devices.

Bought on this website. Open the app, go to Settings, then Account, and sign in with the email address you paid with. We email a six digit code to that address. You can do that on each device you use.

Signing in carries your subscription. Your ledger moves only with Sync, which is a separate switch in Settings.

Changing or canceling

Bought here? Cancel or update your card from the receipt Stripe emails you. Bought on the App Store or Google Play? Cancel from your store account's list of subscriptions. Either way, Premium runs to the end of the period you paid for.

Canceling leaves every decision you logged exactly where it is. App Lock turns off when Premium ends, and comes back without setting it up again if you subscribe again.

Try Premium before you pay

In the free version you can choose a category for any decision and make a second goal, and both are kept. The paywall only appears when you save something Premium, and whatever you chose lights up the moment you upgrade. Planning a spend, the check-in and the countdown to the check-in are free for everyone, and you can try logging a Diff in your browser without installing anything.

Product

  • How it works
  • What people log
  • Widgets, watches and desktop
  • Free vs Premium
  • Premium pricing
  • Download
  • Money saving app for Android
  • Money saving app for Mac
  • Money saving app for Windows
  • Money saving app for Linux

Resources

  • If you buy it anyway
  • Privacy, in one paragraph
  • Questions
  • Blog
  • Changelog
  • No spend challenge app
  • Free no spend tracker
  • Printable savings tracker
  • Savings goal calculator
  • No bank connection
  • About
  • Privacy policy

Support

  • Help and contact
  • hello@littlebirdtrading.com

Other Apps I've Built

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  • Copy Shelter
  • Prompt Petal
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© 2026 Keep the Diff · Planned spend − actual spend = the Diff · Made by Little Bird Trading LLC. · Premium features shown.