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1. Listing metadata
Field-level data| Kelso | REZ Preorder, Back In Stock | |
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| Description | ||
| Screenshots | images | images |
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| Developer | ||
| Kelso | REZ Preorder, Back In Stock | |
|---|---|---|
| Tagline | ||
| Description | ||
| Screenshots | images | images |
| Languages | ||
| Platforms | ||
| Developer | ||
Sell preorders & backorders with full/partial payments. Auto send back-in-stock & coming soon alerts
| Metric | Kelso: Back in Stock Alerts | REZ Preorder, Back In Stock |
|---|---|---|
| Rating | — | 5.0 ★ |
| Total reviews | 0 | 1.2k |
| Free plan | Yes | Yes |
| Pricing | Free plan available | Free |
| Built for Shopify | — | ★ Yes |
| Pricing tiers | 4 tiers | — |
| Listed features | 5 | 5 |
| Languages | 1 supported | 24 supported |
| Listed since | Jul 2026 | May 2025 |
Based on the data on this page, REZ Preorder, Back In Stock is the stronger choice for most Shopify App Store merchants — 5.0★ vs Kelso: Back in Stock Alerts's 0.0★ is a meaningful gap that usually reflects real product or support quality differences across the user base. Pricing entry tiers: Kelso: Back in Stock Alerts at Free plan available, REZ Preorder, Back In Stock at Free. 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 (apps, orders, integrations) varies. REZ Preorder, Back In Stock has the larger user base (1,222 reviews vs 0), which usually maps to broader integration coverage, faster bug-fix cadence, and a deeper bench of community workflow patterns. Kelso: Back in Stock Alerts's smaller cohort can be an advantage for niche workflows where the bigger app has accumulated bloat. Recommended by store size: small/early-stage merchants who need fast install and low risk should default to REZ Preorder, Back In Stock; mid-market and enterprise merchants with specific feature requirements should evaluate both — Kelso: Back in Stock Alerts's 0-review base may include the workflow context that matches your specific use case better than REZ Preorder, Back In Stock'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: Kelso: Back in Stock Alerts audit • REZ Preorder, Back In Stock audit
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| Last updated | — | — |
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| Keyword | Kelso | REZ Preorder, Back In Stock |
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| in stock alerts | Not ranked | #1 |
| of stock | Not ranked | #1 |
| stock alerts | Not ranked | #2 |
Both Kelso: Back in Stock Alerts and REZ Preorder, Back In Stock offer paid plans only. Kelso: Back in Stock Alerts starts at Free plan available; REZ Preorder, Back In Stock starts at Free. Compare the per-tier features in the Pricing section above before committing.
It depends on what you're optimizing for. Kelso: Back in Stock Alerts fits better if you prioritize broader integrations; REZ Preorder, Back In Stock is the call if you need the higher-rated option. Read both apps' detail pages on AppRanks for the full feature breakdown, install counts, and recent listing changes.
Both apps are one-click installs from the Shopify App Store marketplace. REZ Preorder, Back In Stock has more onboarding documentation maturity (1,222 reviews vs 0), which usually translates to better-tested setup wizards and quicker time-to-value. AppRanks doesn't measure setup time directly — read the recent reviews on each app's detail page for merchant-reported install experience.
Kelso: Back in Stock Alerts typically suits early-stage and growth-mode stores based on its review-base composition (0 reviews). REZ Preorder, Back In Stock aligns more with early-stage and growth-mode stores (1,222 reviews). Larger review bases generally mean the app has been load-tested at scale — relevant if you're processing high order volume or handling enterprise compliance requirements.
Migration support varies by app and category. Kelso: Back in Stock Alerts and REZ Preorder, Back In Stock 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 Kelso: Back in Stock Alerts" in each app's help center. AppRanks does not track migration tooling directly — this is a category-specific capability worth verifying before commitment.
