A money saving app for Linux, with no budget and no bank login
Most personal finance software on Linux is either a full double entry ledger or a web app you host yourself. Keep the Diff is smaller than both. It records the purchases you decide not to make and keeps the difference, and it is the same app that runs on iPhone, Android, Mac and Windows.
What the app does
Two numbers. What you were ready to spend, and what you actually spent. The difference is the Diff, counted by week and by month. There is a "Didn't buy it" button for the common case, where the actual number is zero.
There is no budget. The app never tells you what you are allowed to spend, never shows a red number, and buying something anyway costs you nothing but that entry.
On Linux specifically
- An AppImage. One file. Make it executable and run it. Nothing is installed system wide and no administrator password is needed.
- Updates check their signature. The app looks for new versions on keepthediff.com and installs one only when its Ed25519 signature matches the key built into the app.
- Premium is buyable inside the app. Click Premium and pick a plan; payment happens on Stripe's own page and the app unlocks itself.
Your numbers stay on your computer
Everything you log is written to a file in your own data folder. No account needed and no bank connection. With Premium you can turn on sync, which encrypts everything on each device before it leaves, with a key we never have.
What the app needs
A 64 bit Intel or AMD Linux desktop. The app opens without a browser and works with no connection.