A refined smartphone mockup showing an investment portfolio feature screen, presented as a focused app marketing visual in the Format. Place the App Name in the header, with the Portfolio Value and Performance Change clearly visible above a smooth rising portfolio graph. Add the Feature Headline as a concise supporting message and use the Graph Labels as clean range selectors beneath the chart. Set the phone against the Background, using the Color Palette throughout the interface and surrounding composition. Use a modern dark finance-app interface with generous spacing, crisp sans-serif typography, subtle glass panels, a restrained mint glow on the graph line and realistic screen reflections. Keep the phone centered with a slight three-quarter angle, soft edge lighting and enough negative space around it. Ensure every interface label is sharp, correctly spelled and legible.
Use these details:
App Name: "Northstar"
Portfolio Value: "$128,450.72"
Performance Change: "+$18,240.50 +16.5%"
Graph Labels: ["1D", "1W", "1M", "1Y", "All"]
Feature Headline: "See your money grow"
Background: "deep forest green"
Color Palette: "deep forest green, muted sage, soft white and pale mint"
Format: "9:16 vertical"
AI models never repeat themselves exactly, so your result will differ from the one here. Change the details to make it yours.