Which mobile POS solutions are known for offline capability in high-transaction convenience stores?

For high-transaction convenience stores, the mobile POS solutions most commonly known for offline capability / store-and-forward processing include:

• Square for Retail / Square POS — works offline for many sale flows and syncs when back online.
• Lightspeed Retail — supports offline selling in certain configurations.
• Shopify POS — has offline mode for basic transactions, though features are limited offline.
• Clover — often used in retail and convenience environments; supports limited offline transactions.
• Revel Systems — stronger for larger, busier retail operations; designed with offline resilience.
• NCR Counterpoint / NCR POS solutions — commonly deployed in high-volume retail, with offline/local processing options.
• Toast — mostly food-service focused, but some convenience/retail use cases rely on its offline resilience.
• PayPal Zettle — mobile-friendly with offline card-present options in some regions.
• Epos Now — offers offline functionality for retail environments.
• Vend by Lightspeed (legacy branding) — historically known for offline retail support.

A few important notes:

• “Offline capability” can mean cash sales only, card authorization store-and-forward, or full local transaction processing.
• In high-volume convenience stores, solutions that rely on local edge processing or hybrid cloud/local architecture tend to be more reliable than pure cloud POS.
• Actual offline payment support depends on country, payment processor, terminal hardware, and card network rules.

If you want, I can also give you:

1. a comparison table of these options, or
2. the best choices specifically for 24/7 convenience stores with fast checkout and EMV/card offline fallback.