Most households split their grocery shopping across more than one store—buying fresh produce and bakery staples at a neighborhood supermarket, bulk dry goods at a warehouse club, and weekly refills via online delivery.

Pantorio streamlines multi-store grocery shopping from start to finish: you can assign preferred stores to your pantry items, toggle online shopping directly on your Shopping List, step through your ingredients item-by-item inside an integrated Guided Shopping WebView, and customize or hide regional supermarkets in Settings.

1. Supported Online Grocery Stores

Pantorio comes pre-configured with support for 8 major online supermarkets across North America, the United Kingdom, and Europe. Each retailer is integrated with automated product query formatting, category matching, and persistent first-party cart management.

Supermarket	Primary Region	Service Type	Recognized Store Aliases
Instacart	🇺🇸 United States 🇨🇦 Canada	Same-day delivery from thousands of local grocers	`instacart`, `ic`
Amazon Fresh	🇺🇸 US, 🇬🇧 UK 🇩🇪 Germany	Fast grocery delivery and pickup with Prime	`amazon_fresh`, `amazon`, `amazonfresh`
Walmart Grocery	🇺🇸 United States 🇨🇦 Canada	Everyday low prices, home delivery & curbside pickup	`walmart`, `walmart_grocery`, `walmart_supercenter`
Tesco Groceries	🇬🇧 United Kingdom	UK supermarket home delivery & Click+Collect	`tesco`, `tesco_uk`, `tesco_extra`, `tesco_express`
Sainsbury’s	🇬🇧 United Kingdom	UK supermarket online delivery & Click+Collect	`sainsburys`, `sainsbury's`, `sainsbury`, `sainsburys_uk`
Asda Groceries	🇬🇧 United Kingdom	UK home grocery delivery & Click & Collect	`asda`, `asda_groceries`, `asda_uk`, `asda_superstore`
Kaufland	🇩🇪 Germany 🇷🇴 Romania, 🇪🇺 Europe	European hypermarket & online marketplace	`kaufland`, `kaufland_de`, `kaufland_ro`
Lidl	🇬🇧 UK, 🇩🇪 Germany 🇪🇺 Europe	Weekly grocery offers, discounts & online range	`lidl`, `lidl_uk`, `lidl_de`, `lidl_plus`

Automatic Store Name Matching

When you add items to your shopping list from recipes or pantry staples with an assigned store name (such as Tesco Express, Walmart Supercenter, or Sainsbury’s Local), Pantorio automatically recognizes the retailer alias and links those items to the matching online supermarket.

Periodic 72-Hour Catalog Sync

Pantorio maintains an on-device local database (online_stores.db) that stores search URL templates and regional supermarket configurations. The app automatically checks for updated store endpoints and newly supported supermarket partners every 3 days (72 hours) in the background via OnlineStoreCatalogSyncWorker.

2. Managing Stores in Settings (`Settings → Store Names`)

To view your store list, customize store visibility, or add local neighborhood shops:

Open Settings from the top header or side navigation.
Scroll to the Shopping section and tap Store Names (Manage store suggestions and autocompletion).
Here you will find all 8 built-in online supermarkets alongside any custom stores you have added.

Key Store Management Features

Online ordering available Subtitle: Built-in online-capable supermarkets display this green badge in Settings so you always know which stores support in-app guided checkout.
Protected Online Stores: To ensure reliable search queries and cart automation, built-in online supermarkets cannot be renamed or deleted.
Store Visibility Toggle (👁️): Don’t live in the UK or Europe? Simply tap the eye icon next to Tesco, Sainsbury’s, Asda, Kaufland, or Lidl to hide them from your store picker and online shopping bar. Only stores relevant to your region will appear on your shopping screens.
Custom Local Stores: You can add up to 50 custom local shops, farmers’ markets, or specialty delis (such as Trader Joe’s, Costco, or Sprouts) using the input field at the top. Custom stores can be edited (✏️) or removed (🗑️) at any time.

[!NOTE] To keep your everyday inventory screens uncluttered, the Online ordering available subtitle is shown exclusively inside Settings → Store Names and is never displayed on Pantry item cards.

3. The Online Shopping Inline Bar

On your Shopping List, Pantorio provides a dedicated Online Shopping Bar that you can toggle whenever you are ready to order:

Open the Shopping tab.
Tap the Globe (🌐) icon in the filter chip bar (next to the barcode scanner and store filters).
The Online Shopping Inline Bar expands directly above your grocery sections.

How It Works

Retailer Selector Chips: Tap any visible supermarket chip (Instacart, Amazon Fresh, Walmart, Tesco, etc.) to select your target store. The selected chip shows a checkmark (✓ Instacart).
Primary Action Button (🛒 Shop on <Store>): Opens the Guided Shopping WebView and automatically starts searching for your first unchecked grocery item.
Per-Item Quick Search (🔍): When the online shopping bar is open, every item on your grocery list displays a magnifying glass icon. Tapping the search icon next to an ingredient (e.g. Butter or Chicken breast) immediately launches the Guided Shopping WebView scoped to that specific item.

4. Guided In-App Supermarket WebView

Online grocery checkout usually involves tedious copying and pasting between your recipe list and a browser or grocery app. Pantorio eliminates this friction with Guided In-App Shopping:

When you tap Shop on or an item’s search icon, a full-screen guided supermarket session opens:

1. Floating Header & Progress Counter

Store Title & Progress Counter: Shows the active supermarket alongside a compact progress counter (e.g., Instacart and 4/40).
Browser Controls: Includes browser Back (←), Reload (↻), Open in External Browser (↗), and Close (✕).

2. Store Switcher Strip

If an item is out of stock at your chosen supermarket, tap another retailer chip (Amazon Fresh, Walmart, Tesco, etc.) in the top strip to instantly switch stores without losing your place in your grocery list.

3. Horizontal Item Stepper Pills

The top bar displays scrollable pill chips for every unchecked ingredient on your list:

Completed items are marked with a green checkmark (✓ Butter 50g).
The current item is prominently highlighted (2. Chicken breast 700g).
Upcoming items are numbered for quick reference (3. Crushed tomatoes 400g).
Tap any pill chip at any time to jump directly to that ingredient.

4. `✓ Added & Next` Action Button

Once you find the right product on the supermarket page and tap their native Add to Cart button, tap Pantorio’s green ✓ Added & Next button:

Pantorio automatically marks the item as purchased on your shopping checklist.
The added counter increments (1 added to cart).
The WebView immediately executes a search for the next ingredient on your list!

5. Auto-Hiding Controls on Scroll

To give you the maximum screen space while browsing product sizes, reviews, and nutritional details, the top controls automatically collapse upward when you scroll down, and smoothly reappear the moment you scroll up.

Pantorio’s Guided Shopping browser is built with strict privacy and security standards:

Persistent First-Party Login: When you sign in to your supermarket account (such as Instacart, Amazon, Tesco, or Walmart), your first-party authentication cookies remain securely stored in Android’s private app sandbox. You stay signed in between items and future shopping sessions, preserving your cart.
Zero Third-Party Tracking: Third-party advertising trackers, social widgets, and cross-site marketing cookies are strictly blocked inside the WebView.
Strict HTTPS-Only Navigation: Pantorio enforces encrypted HTTPS connections for all online supermarket browsing. Insecure HTTP connections, local device files (file://), and untrusted intent schemes are completely blocked.
Complete Local Data Wipe: If you ever choose to use Reset App & Erase All Data in Settings or request GDPR account deletion, all supermarket WebView cookies, cache files, and DOM storage are permanently erased alongside your local database.

Aisle-Sorted Grocery Lists: Learn how to build checklists from your meal plan, organize by supermarket aisle, and scan ingredient barcodes.
Planning Your Week with Meal Calendars: Plan 7 days of home cooking, dining out, and leftovers to keep your grocery list accurate.
Pantry Inventory & Allergen Alerts: Track staple quantities in your pantry and set custom allergen alerts.