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| Metric | Icona: Size Chart & Size Guide | Kelso: Back in Stock Alerts |
|---|---|---|
| Free plan | Yes | Yes |
| Pricing | Free plan available | Free plan available |
| Built for Shopify | — | — |
| Pricing tiers | 2 tiers | ★ 4 tiers |
| Listed features | 4 | ★ 5 |
| Languages | 1 supported | 1 supported |
| Listed since | Jul 2026 | Jul 2026 |
Pricing entry tiers: Icona: Size Chart & Size Guide at Free plan available, Kelso: Back in Stock Alerts 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 (apps, orders, integrations) varies. Recommended evaluation path: install both apps' free tiers (where available) and run them in parallel on a small cohort of orders 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: Icona: Size Chart & Size Guide audit • Kelso: Back in Stock Alerts audit
Both Icona: Size Chart & Size Guide and Kelso: Back in Stock Alerts offer paid plans only. Icona: Size Chart & Size Guide starts at Free plan available; Kelso: Back in Stock Alerts starts at Free plan available. Compare the per-tier features in the Pricing section above before committing.
It depends on what you're optimizing for. Icona: Size Chart & Size Guide fits better if you prioritize broader integrations; Kelso: Back in Stock Alerts is the call if you need the larger user base. 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. Icona: Size Chart & Size Guide has more onboarding documentation maturity (0 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.
Icona: Size Chart & Size Guide typically suits early-stage and growth-mode stores based on its review-base composition (0 reviews). Kelso: Back in Stock Alerts aligns more with early-stage and growth-mode stores (0 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. Icona: Size Chart & Size Guide and Kelso: Back in Stock Alerts 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.
