Side-by-side comparison · 24 data points
Block checkout with address, phone, order limit validation, and more
| King Checkout Validation | Preorder Guru ‑ Back in Stock | |
|---|---|---|
| Tagline | ||
| Description | ||
| Screenshots | images | images |
| Languages | ||
| Platforms | ||
| Developer |
Boost Sales with Pre Order Now, Pre Sale, Partial Payment, Coming Soon timer & Back in stock Alerts
| Metric | King Checkout Validation | Preorder Guru ‑ Back in Stock |
|---|---|---|
| Rating | 5.0 ★ | 5.0 ★ |
| Total reviews | ★ 20 | 6 |
| Free plan | Yes | Yes |
| Pricing | Free plan available | Free plan available |
| Built for Shopify | ★ Yes | — |
| Pricing tiers | 3 tiers | ★ 4 tiers |
| Listed features | 5 | 5 |
| Languages | 1 supported | 20 supported |
| Listed since | Mar 2024 | Aug 2025 |
King Checkout Validation and Preorder Guru ‑ Back in Stock are evenly matched on rating (5.0★ vs 5.0★) — the differentiator comes down to pricing fit, feature breadth, and which app's interaction pattern suits your team's workflow.
Pricing entry tiers: King Checkout Validation at Free plan available, Preorder Guru ‑ Back in Stock 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.
Recommended evaluation path: install both apps' free tiers (where available) and run them in parallel on a small cohort for 7-14 days before committing. The data tables below show the per-feature breakdown — for most merchants the deciding factor will be a single integration or workflow detail that's hard to compare from listing pages alone.
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: King Checkout Validation audit • Preorder Guru ‑ Back in Stock audit
| Listed |
|---|
| Last updated | — | — |
|---|
| Keyword | King Checkout Validation | Preorder Guru ‑ Back in Stock |
|---|---|---|
| checkout order validation | #2 | Not ranked |
| order limits | #18 | Not ranked |
| order limit | #18 | Not ranked |
Both King Checkout Validation and Preorder Guru ‑ Back in Stock offer paid plans only. King Checkout Validation starts at Free plan available; Preorder Guru ‑ Back in Stock starts at Free plan available. Compare the per-tier features in the Pricing section above before committing.
King Checkout Validation (5.0★, 20 reviews) and Preorder Guru ‑ Back in Stock (5.0★, 6 reviews) are essentially tied on rating. Look at review velocity and individual reviewer quotes — both visible on each app's detail page — to differentiate.
AppRanks cannot separate these two on rating — both sit at 5.0★. King Checkout Validation does carry the larger published review base (20 vs 6). Read both apps' detail pages for the feature breakdown and recent listing changes.
Both apps are one-click installs from the Shopify App Store. King Checkout Validation has the deeper published review base (20 vs 6), 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.
King Checkout Validation typically suits early-stage and growth-mode teams based on its published review base (20 reviews). Preorder Guru ‑ Back in Stock typically suits early-stage and growth-mode teams based on its published review base (6 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. King Checkout Validation and Preorder Guru ‑ 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 Preorder Guru ‑ Back in Stock" in each app's help center. AppRanks does not track migration tooling directly — this is a category-specific capability worth verifying before commitment.
