Shopify schedules a discount once. Promohour keeps it coming back — every day 10am to 8pm, Sunday nights only, or weekday lunch hours. It never edits your product prices. It creates native Shopify discounts with exact start and end times, so there is nothing to undo afterwards. The window is registered in advance, so Shopify itself opens and closes each promotion, to the minute. Set the time zone per promotion and check the next three windows in real dates before you save.

• Recurring windows: every day, chosen weekdays, or a single date
• Native Shopify discounts
• Per-promotion time zone, daylight saving safe, with a 3-window preview