News
Shopify SEO
Shopify development
Holdline
- by Sunkars
- $29/month. Free trial available.
- by Sunkars
- $29/month. Free trial available.
Turn out-of-stock products into revenue with pre-order limits enforced through Shopify checkout—no scripts, clean install.
Claim app
Verify your developer profile to earn a badge and build trust to your apps
About the Holdline
Holdline turns out-of-stock products into revenue by enabling pre-orders with built-in oversell protection. The app enforces strict pre-order limits directly through Shopify checkout—no scripts or leftover code to worry about.
Pre-order inventory is kept separate from your real warehouse stock, so your actual counts stay accurate. Orders are automatically tagged for easy warehouse and 3PL fulfillment routing. When items are back in stock, you'll get notified and can switch back to regular sales with one click.
Built on Online Store 2.0 Theme App Extensions, Holdline installs cleanly and uninstalls without leaving ghost code behind. It's a straightforward solution for capturing sales on out-of-stock items while maintaining control over inventory and fulfillment.
Launched: September 21, 2026
Key features
- Enforces strict pre-order limits natively through Shopify checkout.
- Clean OS 2.0 Theme Block that integrates seamlessly with no ghost code.
- Dual-shield order tagging for seamless warehouse and 3PL fulfillment routing.
- Detects restocked inventory, switch back to regular sales with 1 click.
- Keeps pre-order limits in an isolated location, apart from real warehouse stock
Category:
Pricing of Holdline
Standart Plan
$29 / month
- Unlimited pre-orders & variants
- Zero per-order commission fees
- Zero overselling checkout guard
- Automated restock detection
- 14-day free trial included
