REZ Preorder, Back In Stock vs Swym Back in Stock Alerts
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Nov 8, 2026.
The short answer
- Swym Back in Stock Alerts is detected on 5× as many Shopify stores as REZ Preorder, Back In Stock: 16,681 vs 3,359 as of Nov 8, 2026.
- On the Shopify App Store: REZ Preorder, Back In Stock 5.0 from 1,639 reviews and Swym Back in Stock Alerts 4.5 from 445 reviews.
- Only REZ Preorder, Back In Stock lists a free plan. Paid plans start at $4.99/month for REZ Preorder, Back In Stock and $19.99/month for Swym Back in Stock Alerts.
- REZ Preorder, Back In Stock lists 11 features Swym Back in Stock Alerts’s listing doesn’t mention, including Analytics, Consent collection, Custom alerts.
Head to head
Back in stock, out of stock, pre order & restock alerts
- United States
- United Kingdom
- Australia
- United States
- United Kingdom
- Australia
Momentum
New reviews each month
Review pace is the clearest public read on how fast an app is winning new merchants.
Free
- · 20 preorders per month
- · 30 email per month
- · Customize everything
- · Onboarding with founder
- · Remove branding
- · UNLIMITED signups and auto send emails
Basic
- · 100 preorders per month
- · 24*7 live chat support
- · 500 emails per month
- · All features unlocked
- · Custom email domain/HTML email
- · Full/partial payment, Deposit
Growth
- · 2,000 emails per month
- · 24*7 live chat support
- · 400 preorders per month
- · All features unlocked
- · No transaction fee
Scale
- · 24*7 live chat support
- · 3,000 emails per month
- · 700 preorders per month
- · All features unlocked
- · No transaction fee
- · Unlock everything for $48.99
Starter
- · Automatic back in stock alerts
- · Email list opt-in
- · Klaviyo & Omnisend integration
- · Non-English support
- · Pre order alerts
- · Up to 1k alert reqs/mo
Pro
- · FB pixel integration
- · Limited inventory controls
- · Mailchimp integration
- · Send alerts in batches
- · Up to 10k alert requests/mo
Premium
- · Advanced Inventory Controls
- · More volume? Contact us
- · Multi-location support
- · REST API
- · Up to 25k alert requests/mo
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureUse REZ’s Preorders and Notify Me tools to create waitlists for out of stock products. Accept pre-order, backorder, and presale orders with deposits or partial payment to generate revenue early. Automatically send back in stock alert emails and coming soon notification messages when items are restocked. Let customers request their interest with notify me. Track demand with conversion analytics.
Add a "Notify me" button in minutes to enable automatic back in stock email or SMS alerts when you restock. Maximize sales by capturing demand before you have inventory with the preorder feature. Show AI powered in-stock recommendations for out of stock products. Customize to match your site’s theme. Automate back in stock and restock alerts via your ESP or SMS platform.
- Display a “Notify Me” button and contact form on out-of-stock products
- Restock Alerts: Auto-send back-in-stock notifications via Email
- Out of Stock Waitlist: Track demand with product analytics
- Fully Customizable: Notify Me button, Notification templates, and Alert Email
- Go live in 5 minutes, seamlessly integrating with your theme in any language.
- Automatic restock alerts and reminders via email and SMS.
- Run Facebook/Instagram retargeting ads for audience interested in your products.
- Grow your email lists with out of stock subscribers and reach them via ESPs.
All the numbers
Every figure, side by side
A green dot marks the app ahead on a measured figure. Estimates, gaps and apps that leave no storefront trace never take the lead.
Adoption
| Measure |  REZ Preorder, Back In Stock |  Swym Back in Stock Alerts |
|---|---|---|
| Detected stores | 3,359 | 16,681(ahead) |
| Net store change, 28 days | −6 | −444 |
| Stores added, 28 days | 31 | 133(ahead) |
| Big-brand share | 9% | 20% |
| Top store categories | Apparel & Accessories, Health & Beauty, Home & Garden | Apparel & Accessories, Home & Garden, Health & Beauty |
| Top store countries | United States, United Kingdom, Australia | United States, United Kingdom, Australia |
Reviews
| Measure | REZ Preorder, Back In Stock | Swym Back in Stock Alerts |
|---|---|---|
| App Store rating | 5.0 ★(ahead) | 4.5 ★ |
| App Store reviews | 1,639(ahead) | 445 |
| New reviews, 28 days | Not enough data | 2 |
| Reviewers a year or more in | 0% | Not enough data |
Pricing
| Measure | REZ Preorder, Back In Stock | Swym Back in Stock Alerts |
|---|---|---|
| Free plan | Yes | Not listed |
| Lowest paid monthly plan | $4.99/month(ahead) | $19.99/month |
| Longest free trial | 7 days | 30 days |
| Plans listed | 4 | 3 |
Listing
| Measure | REZ Preorder, Back In Stock | Swym Back in Stock Alerts |
|---|---|---|
| Shopify category rank | #6 | #82 |
| Shopify App Charts | #5 in Pre-orders | #38 on the Shoplist 100 |
| Built for Shopify | Yes | No |
| Launched | May 26, 2025 | Oct 13, 2016 |
| Languages | 1 | 1 |
| Developer | REZ Commerce | Swym Corporation |
Switching movement
12 stores dropped one and added the other in the last 180 days
FAQ
REZ Preorder, Back In Stock and Swym Back in Stock Alerts: common questions
- Which is more popular, REZ Preorder, Back In Stock or Swym Back in Stock Alerts?
- Swym Back in Stock Alerts is detected on 5× as many Shopify stores as REZ Preorder, Back In Stock: 16,681 vs 3,359 as of Nov 8, 2026.
- Is REZ Preorder, Back In Stock or Swym Back in Stock Alerts cheaper?
- Only REZ Preorder, Back In Stock lists a free plan. Paid plans start at $4.99/month for REZ Preorder, Back In Stock and $19.99/month for Swym Back in Stock Alerts. Shoplist compares base prices only between monthly plans in the same currency; usage charges and annual plans vary, so check each plan’s limits.
- Which has better reviews, REZ Preorder, Back In Stock or Swym Back in Stock Alerts?
- On the Shopify App Store: REZ Preorder, Back In Stock 5.0 from 1,639 reviews and Swym Back in Stock Alerts 4.5 from 445 reviews.
- What features does each app list that the other doesn’t?
- REZ Preorder, Back In Stock lists 11 the others don’t mention, such as Analytics, Consent collection, Custom alerts, Email. Swym Back in Stock Alerts lists 9 the others don’t mention, such as Cross-sell emails, Email capture list, Manual alerts, Product recommendations. A feature missing from a listing may still be supported; this compares what each App Store listing says.
- Are stores switching between REZ Preorder, Back In Stock and Swym Back in Stock Alerts?
- 12 stores dropped one and added the other in the last 180 days. Which stores, and in which direction, is in Shoplist.
- Where does this comparison’s data come from?
- Shoplist crawls Shopify storefronts to detect which apps each store runs, and reads each app’s Shopify App Store listing for reviews, pricing, features and integrations. Store counts are as of Nov 8, 2026; estimated figures are labeled.
Keep comparing
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How Shoplist compares apps
Store counts come from Shoplist’s crawl of Shopify storefronts, which detects the apps each store runs; they are as of Nov 8, 2026. Reviews, ratings, plans, features and integrations come from each app’s Shopify App Store listing. 28-day figures are labeled when estimated, and a figure that is missing or estimated never decides who leads. Read the methodology.