Grade My Investments Technology Observatory
GMI · TECHNOLOGY OBSERVATORY // ALL SYSTEMS NOMINAL
ENGINEERED BY LEOPARD DATA

MAUI Cross-Platform Application

Full-featured Grade My Investments client for Android, iOS, and macOS (via Catalyst) with complete feature parity to the web application.

MAUI ARCHITECTURE
rendering diagram…
flowchart TB
    subgraph PLATFORMS[Target Platforms]
        P1([Android 5.0 plus]):::ext
        P2([iOS 12.2 plus]):::ext
        P3([macOS 15 Catalyst]):::ext
    end
    subgraph UI[Presentation - 51 XAML Views]
        V1[Dashboard]:::app
        V2[Generate Report]:::app
        V3[Report Dashboard]:::app
        V4[File Browser TreeView]:::app
        V5[Symbol Lists]:::app
        V6[Account - Billing]:::app
    end
    subgraph SVC[Service Layer]
        S1[GoogleAuthService]:::svc
        S2[SessionService]:::svc
        S3[StripeService]:::svc
        S4[GuidedTourService]:::svc
        S5[CertificatePinning]:::sec
    end
    subgraph LIB[Shared Libraries]
        L1[(Gmi.RestClient)]:::data
        L2[(Gmi.ClassLibrary)]:::data
    end
    PLATFORMS --> UI
    UI --> SVC
    SVC --> LIB
    LIB --> API[(GMI REST API)]:::data
    classDef app fill:#1f2630,stroke:#C0894E,color:#F3EFE8;
    classDef svc fill:#241c14,stroke:#E2B583,color:#F3EFE8;
    classDef data fill:#22201a,stroke:#C0894E,color:#EBD3AE;
    classDef ext fill:#1b1f27,stroke:#5A616B,color:#C4C0B8;
    classDef sec fill:#1d2733,stroke:#5cc8e0,color:#eafaff;
Single C# codebase delivers native experiences on Android, iOS, and macOS Catalyst via a three-layer architecture.

Gmi.Maui.Mobile

The MAUI application provides complete feature parity with the Client Web App, delivering the full Grade My Investments experience across all platforms with 51 XAML views:

Core Investment Features
  • Dashboard with real-time analytics
  • Generate comprehensive stock reports
  • Report Dashboard with symbol & financial detail views
  • Symbol list management with templates
  • Browse and organize report files (TreeView)
  • Position reports with upload and viewing
  • PDF viewer and HTML viewer for report files
Account & Settings
  • Email notification management
  • SMS notification settings
  • Account configuration
  • Payment method management (Stripe)
  • Billing & usage tracking
  • Getting Started onboarding carousel
  • Claude AI file analysis with cost estimate
  • Guided tour with Syncfusion SfPopup

100% Feature Parity: Every feature available in the Client Web App is fully implemented in the MAUI application, ensuring a consistent experience across all devices.

Multi-Platform Distribution

Android
  • Android 5.0+ (API 21)
  • Google Play Store
  • Material Design
  • Google OAuth sign-in
  • Native performance
iOS
  • iOS 12.2+
  • App Store
  • Human Interface Guidelines
  • Google OAuth sign-in
  • Native iOS features
Mac Catalyst
  • macOS 15.0+
  • Mac App Store
  • Apple Silicon native
  • Google OAuth sign-in
  • Desktop experience
One Codebase, Three Platforms: The MAUI application uses a single C# codebase to deliver native experiences on Android, iOS, and macOS. Windows support is available in the target framework configuration but is built only on Windows CI agents.

Key Features (Same as Client Web)

Dashboard

Quick stats, card expiration warnings, and action buttons with guided tour

Generate Reports

Create comprehensive stock analysis reports with symbol list selection

Symbol Lists & Templates

Create custom symbol lists, browse templates, and view symbol details

Report Dashboard

Interactive report viewer with symbol detail and financial detail pages

File Management

Browse folders with Syncfusion TreeView, view PDFs and HTML reports inline

Notifications

Configure email and SMS alerts for report completion

Account & Billing

Manage Stripe payment methods and view billing and usage data

Position Reports

Upload, view, and manage portfolio position reports

Claude AI Analysis

Analyze files with Claude AI for financial insights, with cost estimate before confirming

Technical Architecture

Presentation Layer (51 XAML Views)
XAML Views
Code-Behind
Syncfusion Controls
↓
Service Layer
GoogleAuthService
SessionService
StripeService
GuidedTourService
IdleTimeoutService
CertificatePinning
↓
Data Layer (Shared Libraries)
Gmi.RestClient
Gmi.ClassLibrary
FMP API Client
Development Stack
  • .NET 10 MAUI
  • XAML / C# (51 Views)
  • Shell Navigation
  • CommunityToolkit.Maui
  • Dark Theme (#1a1a1a) + Gold (#C4975F)
NuGet Packages
  • Microsoft.Maui.Controls 10.0
  • Microsoft.Extensions.Http
  • System.Text.Json
  • Stripe.net
  • Syncfusion.Maui.TreeView
  • Syncfusion.Maui.PdfViewer
  • Syncfusion.Maui.Popup
  • CommunityToolkit.Maui
Platform Features
  • Google OAuth sign-in
  • Inline PDF viewing
  • Inline HTML report viewing
  • Syncfusion TreeView file browser
  • Claude AI file analysis with cost estimate
  • Guided onboarding tour (SfPopup)
Security Features
  • Google OAuth authentication
  • Secure token storage
  • JWT token management
  • HTTPS API communication
  • PCI-compliant Stripe integration
  • Certificate pinning (SPKI hashes)
  • 60-minute idle timeout auto-logout
Performance
  • Fast startup time
  • Low memory usage
  • Battery optimized
  • Background sync
  • Native performance
Distribution Channels
  • Google Play Store (Android)
  • Apple App Store (iOS)
  • Mac App Store (Catalyst)
  • Direct download (APK)
Shared Class Libraries
  • Gmi.RestClient
  • Gmi.ClassLibrary
  • Gmi.RestClient.FinancialDataProvider
Same API client and model libraries shared with the web application