You don't need
another budgeting app
You're not trying to figure out where your money went. You already know. You just want to see if the plan is working.
Not transaction tracking
You don't need to categorize every coffee. You need to know if your wealth is growing.
Not bank connections
Your financial data stays yours. No credentials, no third parties, no risk.
Not another system to learn
If you've tracked finances before, you'll feel at home. Same simplicity, better visualization.
fatstack is for people who already have a system. We just make it easier to see if it's working.
The Pareto approach to wealth tracking
20% of the effort. 100% of the clarity.
Check in with your accounts
Once a week, once a month. You decide. Open your accounts, enter the numbers. It takes 5 minutes and keeps you connected to where your money actually lives.
We handle the math
Multiple currencies? We convert everything to your base currency using the exact exchange rate from that date. Accurate, automatic, archived.
Total
$41,200
See the trajectory
One chart. One number. Is it going up? That's what matters. Track progress over months and years, not days.
For people who value their time
You could track every transaction. Or you could spend 5 minutes a month and know exactly where you stand.
5 minutes a month
The whole picture in less time than a coffee break. Because you have better things to do.
Your data stays yours
No bank logins. No third parties. Just numbers you type yourself.
Any currency, anywhere
USD, EUR, GBP, crypto. Track accounts in any currency and we handle the conversion math.
One number that matters
Your total net worth, updated. Not 47 budget categories. Just the number.
Simple by design
No learning curve. If you've tracked finances before, you'll feel at home.
Import your history
Already tracking in a spreadsheet? Import your data and pick up where you left off.
Export anytime
Your data in CSV whenever you want. No lock-in, no proprietary formats.