The iOS Backup Machine is a self-contained backup appliance for iOS devices, designed to run on a single-board computer (Radxa Zero 3W) with a Waveshare e-Paper display and PiSugar UPS. The software provides a Flask-based web UI for configuration and monitoring, a background daemon that manages iPhone backups via libimobiledevice (idevicebackup2), remote sync via rsync over SSH with host key pinning, WireGuard VPN integration for secure remote access, and notification delivery via MQTT or webhooks. It features encrypted credential storage (AES-256-GCM), automatic backup scheduling, staleness detection, battery-aware operation, and a setup wizard. The architecture is primarily monolithic with the main daemon (iosbackupmachine.py) handling display, backup orchestration, network monitoring, and hardware integration, while separate modules handle sync management, crypto, config, and the web interface. The codebase is well-tested with unit tests covering fail-safes, resource bounds, and configuration migration, and it demonstrates strong engineering practices in areas like atomic file writes, log capping, and rate-limited progress reporting.