Side-by-side comparison · 24 data points
Grow sales with pre-order, backorder. Add out of stock waitlists with 'notify me' & restock alerts.
| Preorder, Back in stock Duck | Restock Alerts by MerchaLabs | |
|---|---|---|
| Tagline | ||
| Description | ||
| Screenshots | images | images |
| Languages | ||
| Platforms | ||
| Developer | ||
| Listed | ||
| Last updated | — |
Notify shoppers by email the instant a sold-out product restocks — automatic, no manual follow-up.
| Metric | Preorder, Back in stock Duck | Restock Alerts by MerchaLabs |
|---|---|---|
| Rating | 5.0 ★ | — |
| Total reviews | 515 | 0 |
| Free plan | Yes | Yes |
| Pricing | Free plan available | Free plan available |
| Built for Shopify | ★ Yes | — |
| Pricing tiers | ★ 4 tiers | 3 tiers |
| Listed features | ★ 5 | 3 |
| Featured placements | 2 | — |
| Languages | 1 supported | 1 supported |
| Listed since | Mar 2023 | Jun 2026 |
Based on the data on this page, Preorder, Back in stock Duck is the stronger choice for most Shopify App Store merchants — 5.0★ vs Restock Alerts by MerchaLabs's 0.0★ is a meaningful gap that usually reflects real product or support quality differences across the user base.
Pricing entry tiers: Preorder, Back in stock Duck at Free plan available, Restock Alerts by MerchaLabs at Free plan available. Check each app's tier structure for the capacity limits you actually need before deciding — the headline number is the same shape, but the gating shape per tier (seats, usage volume, integrations) varies.
Preorder, Back in stock Duck has the larger user base (515 reviews vs 0), which usually maps to broader integration coverage, faster bug-fix cadence, and a deeper bench of community workflow patterns. Restock Alerts by MerchaLabs's smaller cohort can be an advantage for niche workflows where the bigger app has accumulated bloat.
Recommended by size: small/early-stage merchants who need fast install and low risk should default to Preorder, Back in stock Duck; mid-market and enterprise merchants with specific feature requirements should evaluate both — Restock Alerts by MerchaLabs's 0-review base may include the workflow context that matches your specific use case better than Preorder, Back in stock Duck's broader-but-shallower coverage.
This verdict is generated from the live marketplace data on this page — rating, review count, pricing tier, and category position all refresh from the canonical Shopify App Store listing every 24 hours. AppRanks does not accept payment to influence comparison outcomes; the methodology is documented on the About page and applies identically to every pair on the site.
Read each app's audit: Preorder, Back in stock Duck audit • Restock Alerts by MerchaLabs audit
| Keyword | Preorder, Back in stock Duck | Restock Alerts by MerchaLabs |
|---|---|---|
| sold-out products | #4 | Not ranked |
| notify | #6 | Not ranked |
| preorder | #8 | Not ranked |
Not featured in any section recently.
No tracked changes.
Both Preorder, Back in stock Duck and Restock Alerts by MerchaLabs offer paid plans only. Preorder, Back in stock Duck starts at Free plan available; Restock Alerts by MerchaLabs starts at Free plan available. Compare the per-tier features in the Pricing section above before committing.
AppRanks cannot separate these two on rating, because neither publishes one. Preorder, Back in stock Duck does carry the larger published review base (515 vs 0). Read both apps' detail pages for the feature breakdown and recent listing changes.
Both apps are one-click installs from the Shopify App Store. Preorder, Back in stock Duck has the deeper published review base (515 vs 0), which often — though not always — accompanies better-tested setup docs. AppRanks doesn't measure setup time directly: read the recent reviews on each app's detail page for user-reported install experience.
Preorder, Back in stock Duck typically suits early-stage and growth-mode teams based on its published review base (515 reviews). Restock Alerts by MerchaLabs typically suits early-stage and growth-mode teams based on its published review base (0 reviews). A larger review base generally means the app has been exercised at scale — relevant if you are processing high volume or handling enterprise compliance requirements.
Migration support varies by app and category. Preorder, Back in stock Duck and Restock Alerts by MerchaLabs both publish their export options on their marketplace listing pages (or in their support docs); some apps offer one-click import from competitors, others require CSV. The fastest check: search "import from Restock Alerts by MerchaLabs" in each app's help center. AppRanks does not track migration tooling directly — this is a category-specific capability worth verifying before commitment.
