Side-by-side comparison · 24 data points
Grow sales with pre-order, backorder. Add out of stock waitlists with 'notify me' & restock alerts.
| Quick Stock Notifier ‑ Instock | Preorder, Back in stock Duck | |
|---|---|---|
| Tagline | ||
| Description | ||
| Screenshots | images | images |
| Languages | ||
| Platforms | ||
| Developer | ||
| Listed | ||
| Last updated | — | — |
Customer can easily be notified when the product back in stock.
| Metric | Quick Stock Notifier ‑ Instock | Preorder, Back in stock Duck |
|---|---|---|
| Rating | 3.0 ★ | ★ 5.0 ★ |
| Total reviews | 4 | ★ 515 |
| Free plan | Yes | Yes |
| Pricing | Free trial available | Free plan available |
| Built for Shopify | — | ★ Yes |
| Pricing tiers | 3 tiers | ★ 4 tiers |
| Listed features | 3 | ★ 5 |
| Featured placements | — | 2 |
| Languages | 1 supported | 1 supported |
| Listed since | Aug 2020 | Mar 2023 |
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 Quick Stock Notifier ‑ Instock's 3.0★ is a meaningful gap that usually reflects real product or support quality differences across the user base.
Pricing entry tiers: Quick Stock Notifier ‑ Instock at Free trial available, Preorder, Back in stock Duck 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 4), which usually maps to broader integration coverage, faster bug-fix cadence, and a deeper bench of community workflow patterns. Quick Stock Notifier ‑ Instock'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 — Quick Stock Notifier ‑ Instock's 4-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: Quick Stock Notifier ‑ Instock audit • Preorder, Back in stock Duck audit
| Keyword | Quick Stock Notifier ‑ Instock | Preorder, Back in stock Duck |
|---|---|---|
| sold-out products | Not ranked | #4 |
| notify | Not ranked | #6 |
| preorder | Not ranked | #8 |
Not featured in any section recently.
No tracked changes.
Both Quick Stock Notifier ‑ Instock and Preorder, Back in stock Duck offer paid plans only. Quick Stock Notifier ‑ Instock starts at Free trial available; Preorder, Back in stock Duck starts at Free plan available. Compare the per-tier features in the Pricing section above before committing.
Preorder, Back in stock Duck has the higher average rating (5.0★ from 515 reviews) compared to Quick Stock Notifier ‑ Instock (3.0★ from 4 reviews). Both are tracked daily by AppRanks, so the figures here update each refresh cycle.
Preorder, Back in stock Duck holds the higher average rating (5.0★ vs 3.0★). That is the one dimension AppRanks can separate them on here — 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 4), 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.
Quick Stock Notifier ‑ Instock typically suits early-stage and growth-mode teams based on its published review base (4 reviews). Preorder, Back in stock Duck typically suits early-stage and growth-mode teams based on its published review base (515 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. Quick Stock Notifier ‑ Instock and Preorder, Back in stock Duck 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 Quick Stock Notifier ‑ Instock" in each app's help center. AppRanks does not track migration tooling directly — this is a category-specific capability worth verifying before commitment.
