Celara review for UpsellPlus Checkout Upsell

This is by far the best Shopify app I've used. I needed a subscription offer that would upsell customers who hadn't initially opted for a subscription, right at checkout. After receiving quotes from developers ranging from $600 to $2400 and waiting 1-2 weeks, Jaap from UpsellPlus Checkout set everything up in just 5 minutes. The efficiency and effectiveness of this app are truly impressive!