A money saving app for Windows, with no budget and no bank login
Windows gets the thin end of personal finance software: a web app in a browser tab, or nothing. Keep the Diff ships a real Windows installer, and it works exactly like the Mac and phone versions because it is the same app.
What it does
Two numbers. What you were ready to spend, and what you actually spent. The difference is the Diff and it is yours, counted by week and by month. There is a "Didn't buy it" button for the common case, where the actual number is zero.
It is not a budget. It never tells you what you are allowed to spend, it never shows a red number, and buying something anyway costs you nothing but that entry.
On Windows specifically
- A signed installer. Signed through Azure Trusted Signing, so Windows does not throw a SmartScreen warning at you and the publisher name is real.
- A normal EXE, installed per machine, uninstallable from Add or Remove Programs like anything else. No store account needed.
- It updates itself, so the copy you install today keeps up.
- Premium is buyable inside the app. Click Premium and pick a plan; payment happens on Stripe's own page and the app unlocks itself. No card details ever touch the app.
- Also on the Microsoft Store for people who prefer installing from there.
Your numbers stay on your PC
Everything you log is written to a file in your own app data folder. No account, no sign-in, no analytics, no tracking. There is no bank integration in the app, so there is nothing to link and no transaction feed to read.
It is not Windows only
The same app runs on iPhone, iPad, Mac, Apple Watch, Android and Wear OS. One Premium subscription covers every device you own.