Here is a list (summarized by LLM)

Conversion, Scaling, and Measurement

    Conversion to weights from volume (e.g., converting '1 cup of flour' to grams). One developer noted they'd look into generic conversion feasibility.

    Scaling a recipe (e.g., adjusting ingredients for 1.5x or 2x the batch size).

    Unit Choice: Offering a clear choice between metric and imperial units.

    Unit Specificity: The ability to differentiate between US and non-US cups for accurate conversions.

    Data Structure: Displaying ingredient data with consistent units in a database to enable easy batch size adjustments and visualization of value changes.

 Structured Data and Presentation

    C4E Format: Converting recipes to the format used on Cooking For Engineers.

    Process Visualization: Displaying the entire recipe process using Gantt charts or a Directed Acyclic Graph (DAG) / graphviz to illustrate dependencies between steps.

    SEO/Integration: Incorporating JSON-LD support for better recipe recognition and advanced features.

    Printability: Generating dedicated print-friendly pages.

    Standard Layout: A simplified, standardized layout for better readability across all recipes.

    Sharing: A feature for sharing recipe "image cards" (screenshots) with friends.

 Management, Search, and Tools

    Shopping List: Creating a grocery list from the scraped ingredients.

    List Filtering: The ability to exclude common ingredients (salt, pepper, olive oil) from the automatically generated shopping list.

    Nutrition: Generating automatic nutrition labels.

    Personal Database: The capability to ingest every recipe from every cookbook into a personal, searchable database.

    Search Function: Allowing search for recipes instead of just requiring a URL input.

    Sync/Backup: Enabling server-sync and export/import of recipes.

    Timers: The option to set a timer linked to the time specified in a recipe step.

    Custom Lists: Allowing users to create their own categorization rules for ingredients on shopping lists.

 Platform and UI

    Dark Mode: Adding a dark mode for late-night cooking.

    iOS Integration: Implementing a Safari extension feature for the iOS app to open recipe pages automatically within the app.

    Video Parsing: The capability to parse recipes from YouTube URLs or videos.