You can add the Cost Basis field to your Portfolio to see the cost basis value for your positions.
To add the Cost Basis column in IBKR Mobile:
- Tap Portfolio from the navigation bar at the bottom of the screen.
- In the top right corner, tap the three dots.
- Tap Manage Columns and at the bottom of the screen, tap "+Add Columns"
- In the "Positions and P&L section, tap Cost Basis to add the column to your portfolio.