The portfolio tracker that plans your next buys.
KrabyFlow tracks your stocks, ETFs, funds, crypto, savings, property and loans in one place. Give each holding a target, say what you can invest this month, and it works out what to buy.
Made for investors in Europe. No bank or broker logins, prices in your currency, tax rules for Belgium, France, Switzerland, the UK and the US.
This is the app itself, running on a made-up portfolio with real market prices. Every page in the menu works. Nothing you change in the window is kept.
Ask your AI assistant about your portfolio.
Connect KrabyFlow to Claude, ChatGPT, Gemini or Grok and ask in plain words. The assistant reads your holdings, buy plan, dividends and risk reports through a connector, and answers with your own figures.
- Reads, never writes
- The assistant sees the figures it asks for. It cannot add a holding, change a target or place a trade.
- Where it works
- Claude, ChatGPT, Gemini or Grok, through one connector.
- Your call
- Connect once from Settings. Disconnect at any time, and it stops at once.
- Plan
- Part of Max.
Everything you own, in one number.
Net worth is what you hold minus what you owe. Stocks and funds, crypto, savings and current accounts, property and the loan on it: each is priced in your base currency, and the total is kept day by day so you can see how it moved and why.
- Your currency
- 18 base currencies. Holdings in any other currency are converted at the day’s rate.
- Your country
- Transaction, dividend and interest taxes for Belgium, France, Switzerland, the United Kingdom and the United States. The yearly tax report, with each form and deadline, is for Belgium for now.
- Your banks
- Each account sits at a bank, broker or crypto platform, with its fees, and the deposit guarantee is checked.
A buy plan you can read.
The same four steps every month, for every portfolio. Each score lists the figures it came from, and the weights behind it are yours to change.
Each holding gets a score
First, how far it is below the share you set for it, in money: that is what it needs. Then the timing: for a stock, its trend and where analysts’ earnings estimates are heading; for a coin, its trend and the market’s mood; a fund goes by its need alone. A stock’s valuation and growth are shown beside it but not scored: in our backtests they did not predict returns. Timing moves a holding up or down the list; it never puts a nearly full holding ahead of an empty one. Nothing to type in: the figures are worked out for every stock, fund and coin you add.
Your limits apply
A holding past the size you allow is blocked, and a category that is already crowded is marked down. Exclude a holding for the month and it stays out; pin one and it is bought first.
The budget becomes orders
Money goes to the best scores first, one purchase at a time: whole shares, exact amounts where your broker sells parts of a share, or lots on a market that trades in them. An order whose fees would eat too much of it is left out.
The plan says what it could not do
When the holding that needs money most costs more than the month’s budget and nothing else comes close, a portfolio that tracks its cash is told to save up for it. Otherwise the plan shows what a little more money would have added.
Or write your own formula. Build the ranking from blocks: moving averages, RSI, MACD, VWAP, analyst revisions, dividend yield and your targets. Try it on any amount before you keep it, and say how far a purchase may pass a target. Saving one comes with Pro.
Income you can count on.
Every dividend your holdings pay, when it lands, and what is left after the tax withheld abroad and the tax due at home. The treaty rate between your country and each company’s is applied, so the figure you plan with is the one that reaches your account.
- Twelve months ahead
- Expected payments month by month, from last year’s dates at the latest amounts.
- Five years back
- How the income grew, and which holdings raised their dividend every year.
- The whole month
- Income and expenses draws where each month’s money goes, with dividends, interest, rent and loan payments filled in for you.
See the risk before the market shows it to you.
Drawdowns show the worst fall of each holding and how long it took to come back. Correlation shows which ones fall together. Look-through opens your funds to find the companies you hold twice. Risk contribution says where the portfolio’s swings really come from.
- Past crashes
- Test your holdings on the dot-com crash, 2008, 2020 and 2022 to see how alike they behaved.
- Worst weeks
- The value at risk and the expected shortfall of a day, a week and a month.
- Before you buy
- What adding money to any holding would do to the portfolio’s volatility and expected return.
Plans.
Start on Free with one portfolio and the buy plan. Move up for more room, the planning pages or the deeper analysis.
Free
One portfolio, the buy plan and the basics
€0
No card needed
- 1 portfolio
- 10 holdings per portfolio
- 10 watchlist items per portfolio
- 1 of each other kind of asset
- 1 savings plan
Basic
Every standard feature for one portfolio
€4.99
A month. Cancel any time.
- 1 portfolio
- 20 holdings per portfolio
- 20 watchlist items per portfolio
- 3 of each other kind of asset
- Unlimited savings plans
Pro
Best offerSeveral portfolios and the advanced analytics
€9.99
A month. Cancel any time.
- 3 portfolios
- 50 holdings per portfolio
- 50 watchlist items per portfolio
- 5 of each other kind of asset
- Unlimited savings plans
Max
Everything, without limits
€19.99
A month. Cancel any time.
- Unlimited portfolios
- Unlimited holdings per portfolio
- Unlimited watchlist items per portfolio
- Unlimited of each other kind of asset
- Unlimited savings plans
See what each plan includes, with prices in EUR, USD, CHF or GBP, by the month or by the year with two months free.
Made in Brussels by Pentalab.
Pentalab builds software for work where mistakes are expensive. Its first product, NNSFlow, screens clients for Swiss private banks and keeps evidence their auditors can check ten years later. KrabyFlow brings the same habits to your own money: rules you can read, figures you can trace, and a stack chosen to last.
About Pentalabthepentalab.com(opens in a new tab)nnsflow.com(opens in a new tab)
Bring the portfolio you already have.
Add your holdings, give each one a target, and set what you can invest each month. The first plan is ready as soon as the prices are in.