A personal investment ledger. You write down what happened (a deposit, some interest, a fee, a withdrawal) and Portfolio works out your balance, earnings, returns and charts across all your platforms and holdings.
Note
About this README. This guide was written by AI (Claude). I have only tested the app on Windows and Android. It also builds for macOS, Linux, iOS and the browser, but I have not tried those, so expect rough edges there.
- Dashboard with your total balance, deposits, earnings, return (XIRR) and charts over time.
- Statistics for anything: the whole portfolio, a single platform, a single holding, or every holding of one type, for any period.
- Entries, holdings and platforms lists with search, filters, sorting, grouping, and a cards or table view.
- Live preview when adding an entry: you see how your balance, invested capital and earnings will change before you save, plus warnings for common mistakes.
- Works on desktop and phone with a layout that adapts to the screen size.
- Backup & sync between devices with a single file. No account, no server, no cloud.
- Your data stays on your device.
You need the .NET 10 SDK. Then, from this folder:
dotnet run --project Portfolio.DesktopInstall the Android workload once:
dotnet workload install androidConnect your phone with USB debugging enabled (Android 7.0 or newer), then:
dotnet build Portfolio.Android -t:Installdotnet run --project Portfolio.BrowserThe browser version starts with demo data so you can look around without entering anything. All the screenshots in this guide come from it.
Your portfolio is organised in three levels:
| Level | What it is | Example |
|---|---|---|
| Platform | Where your money is: a broker, bank or lending site | Trade Republic, Mintos |
| Holding | A specific investment on that platform | "Dividend stocks", "Cash savings" |
| Entry | Something that happened to a holding on a date | Deposited €300, earned €12 interest |
So the first time you open the app:
- Add a platform from the Platforms screen.
- Add a holding to it from the Holdings screen, and pick its role (see below).
- Add entries with the New entry button, which is always visible.
Everything else (balances, earnings, returns, charts) is calculated from your entries.
Each holding has a role that describes what you are doing with it. It is used for grouping and filtering, so pick whatever fits best:
| Role | Meaning |
|---|---|
| Grow | You keep adding money to it |
| Compound | Its income is reinvested |
| Hold | Left alone, no money in or out |
| Buffer | A cash reserve |
| Shrink | Slowly winding it down |
| Exit | Closing it out |
| Other | Anything else |
Pick the platform, the holding and the date, then fill in only the fields that apply. One entry can contain several things at once, such as a deposit that you invested the same day, or interest with tax taken off.
| Section | Fields | Use it when… |
|---|---|---|
| Cash in and out of the platform | Deposit, Withdrawal | You send money to the platform or take it out |
| Between platform cash and the asset | Invested, Capital repaid | Cash on the platform goes into the investment, or comes back from it |
| Income | Interest, Bonus | You earn interest, dividends, rewards or referral bonuses |
| Costs and losses | Tax, Fee, Written off | You pay tax or fees, or lose money because an investment defaulted |
| Reported value | Market value on this date | The platform tells you what the holding is worth today |
All amounts are entered as positive numbers. The section they go in decides whether money is coming in or going out.
At the bottom of the form you can see how the entry changes your balance, invested capital and earnings. You will also get a warning if something looks wrong, such as a date in the future or withdrawing more cash than you have.
Tip
Market value is optional. Fill it in only when your platform reports a value (for example a fund's current price). It is used as the holding's estimated value until you enter a new one.
Your whole portfolio at a glance: balance, money paid in, earnings, return and charts. Use the Period selector to look at a single month, a year, or all time.
The same figures and charts, for whatever you choose in Scope: the whole portfolio, one platform, one holding, or a group of holdings. You can also open it straight from any holding or platform with the Stats button.
Every entry you have recorded. Search by note, holding or platform, filter by period, platform, holding or type of movement, and sort or group the results. The bar above the list shows the totals for whatever is currently filtered.
All your holdings with balance, invested, earnings, return and share of the portfolio. Group them by platform or role, and switch between Cards and Table.
Your platforms and how your money is split between them.
On a narrow screen the side menu becomes a bottom bar, lists default to cards, and editors open as full pages so the back gesture works as expected. The backup screen is behind the sync icon on the dashboard.
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Portfolio has no cloud account. To move your data from one device to another (for example from your PC to your phone):
- On the device with the latest data, open Backup & sync and press Export backup. This
saves a file such as
portfolio-2026-10-06-desktop.json. - Move the file to the other device any way you like: Google Drive, email, a USB cable…
- On the other device, open Backup & sync, press Import backup and pick the file.
Warning
Importing replaces everything on that device. Nothing is merged. If the device has changes that are not in the file, the app tells you before it replaces anything.
Before every import the app keeps a restore point of the data it replaced. If you imported by mistake, press Restore on the same screen to get it back.
The easiest routine is to make your changes on one device only, and export/import whenever you want the other one to catch up.
Caution
Backup files contain all your financial data. Keep them somewhere private.
| Device | Location |
|---|---|
| Windows | %LOCALAPPDATA%\Portfolio\Portfolio.db |
| Android | Inside the app's private storage (removed if you uninstall the app, so export a backup first) |
| Browser | The browser's local storage for that site |
Project structure, architecture and build notes are in TECHNICAL.md.