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Trades · Holdings · Multi-currencyRecord the full picture.
Keep trades and holdings organised across multiple accounts and currencies, with cost-basis information grounded in the transactions you enter.
CostBasisPortfolio & cost-basis tracker
Private portfolio clarity
Know what you own. Understand what it’s doing.
Record trades, understand your cost basis and review realised and unrealised performance across accounts and currencies—without handing your portfolio to the developer.
For informational and record-keeping purposes. Not investment advice.
Your portfolio, organisedPrivate records on your device
Portfolio viewAccounts & currencies
AnalysisCost basis & risk
PortabilityDrive sync & Excel
Built for ownership
Useful detail, without the noise.
CostBasis keeps the focus on the records and calculations that help you understand a portfolio. It is a tracker and analysis companion—not a brokerage or advice service.
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Performance · Quotes · Risk analysisSee performance clearly.
Review realised and unrealised performance, refresh market information and explore portfolio risk from one focused workspace.
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Optional sync · Excel exportKeep your records portable.
Use optional Google Drive sync for your own backup and export records to Excel when you want to work with them elsewhere.
More built in
A deeper portfolio toolkit.
The app goes beyond a holdings list, with accounting detail, portfolio structure and practical controls drawn from the real workflows in the app.
Trade records with validation
Record buys and sells with dates, quantities, prices, fees and taxes. CostBasis checks sellable quantities and flags entered prices or exchange rates that differ sharply from current data.
Cash flow and XIRR
Track deposits, withdrawals, dividends, fees and taxes, then review total invested capital, net asset value, profit, profit percentage and money-weighted return through XIRR.
Allocation from multiple angles
Group holdings by asset type, country, sector, industry or custom tags. Tag exposure can be split across tags or counted in full for each selected tag.
Concentration risk checks
See the largest holding, top-five concentration, leading sector, currency and country. Built-in warnings highlight high single-holding and top-five concentration.
Market and currency support
Refresh stock quotes through Yahoo Finance and FX rates through Frankfurter. Symbol guidance covers US, Hong Kong, New Zealand, Shanghai and Shenzhen markets.
Security and localisation
Hide summary amounts, protect the app with a four-digit passcode and Face ID, and use it in English, Simplified or Traditional Chinese, Japanese, Korean, Spanish or Portuguese.
A simple rhythm
From transaction to perspective.
CostBasis turns the records you already know into a clearer view of what is happening across your portfolio.
Record
Add brokers, accounts, assets, trades and cash flows that form your portfolio history.
Review
Inspect cost basis, realised and unrealised results, allocation, cash performance and concentration across currencies.
Back up or export
Create a local backup, restore validated data, sync through your Google Drive account or export an Excel workbook.
Privacy choices built in
Your portfolio is not the product. Ad-free when you subscribe.
The developer does not collect your portfolio records. The free version may display Google Mobile Ads; a monthly subscription removes ads while active, while your records remain on your device unless you export or sync them.
CostBasis for iPhone & iPad
Bring clarity to every transaction.
A focused, private way to keep portfolio records and understand cost basis.