Restokr vs RMS Preorder & Back in Stock
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Oct 13, 2026 for Restokr, Oct 22, 2026 for RMS Preorder & Back in Stock.
The short answer
- Both list a free plan. Paid plans start at $11/month for Restokr and $4.90/month for RMS Preorder & Back in Stock.
- RMS Preorder & Back in Stock lists 8 features Restokr’s listing doesn’t mention, including Alert settings, Auto-alerts, Custom alerts.
Head to head
Free
- · 50 restock alerts a month
- · Size-aware alerts
- · Smart send rules
- · Support
Starter
- · 10 languages
- · All of free features
- · Discount codes
- · Unlimited alerts
- · Your own sending domain
Growth
- · Adds preorders and AI reorder briefings
- · All of free and starter features
- · Free support
Free
- · "Powered by" branding shown
- · 10 preorder signups per month
- · 25 back in stock signups per month
- · 7 days analytics retention
- · Basic button colours (black/white)
- · Basic signup popup style
Starter
- · 18 languages supported
- · 250 preorder signups per month
- · 30 days analytics retention
- · 500 back in stock signups per month
- · All customisation options
- · CSV + JSON data export
Growth
- · 1,000 preorder signups per month
- · 18 languages supported
- · 2,500 back in stock signups per month
- · 90 days analytics retention
- · CSV + JSON data export
- · Custom email sender domain
Enterprise
- · 1 year analytics retention
- · 18 languages supported
- · CSV + JSON data export
- · Custom email sender domain
- · Priority support
- · Unlimited back in stock signups
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureRestock adds a notify me button to sold-out products and emails those shoppers when stock returns. Alerts are size aware, so someone waiting on a medium hears about mediums. Your waitlist then becomes a reorder plan. Restock ranks products by demand, shows how it splits across sizes, and writes an AI summary of what to restock first and how many units. You control how much stock must return before anyone is emailed.
It's 11pm and your bestseller just sold its last unit. A week ago you'd have shrugged it off — now you know a customer just hit "Out of Stock" and quietly left. RMS Back in Stock lets them raise their hand instead: "tell me when it's back." The moment you restock, it emails everyone waiting, automatically. You stop losing sales to stockouts and start converting waitlists while you sleep. Start free.
- Automatic email alerts when sold-out items restock
- "Notify me" button added to product pages, no code needed
- Waitlist dashboard showing which products shoppers want most
- Convert opportunities into sales
- One-click setup with your existing theme
- Fully customisable button, popup, and email designs
- Multi-language support (customer-facing) for global stores
- Real-time analytics to track signups and conversions
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 |  Restokr |  RMS Preorder & Back in Stock |
|---|---|---|
| Detected stores | Not published | Not published |
| Net store change, 28 days | 0 | 0 |
| Stores added, 28 days | Not enough data | Not enough data |
| Big-brand share | Not enough data | Not enough data |
| Top store categories | Not published | Not published |
| Top store countries | Not published | Not published |
Reviews
| Measure | Restokr | RMS Preorder & Back in Stock |
|---|---|---|
| App Store rating | Not published | Not published |
| App Store reviews | Not published | Not published |
| New reviews, 28 days | Not enough data | Not enough data |
| Reviewers a year or more in | Not enough data | Not enough data |
Pricing
| Measure | Restokr | RMS Preorder & Back in Stock |
|---|---|---|
| Free plan | Yes | Yes |
| Lowest paid monthly plan | $11/month | $4.90/month(ahead) |
| Longest free trial | Not listed | 7 days |
| Plans listed | 3 | 4 |
Listing
| Measure | Restokr | RMS Preorder & Back in Stock |
|---|---|---|
| Shopify category rank | #308 | #218(ahead) |
| Shopify App Charts | Not on this week’s charts | Not on this week’s charts |
| Built for Shopify | No | No |
| Launched | Jul 3, 2026 | Feb 10, 2026 |
| Languages | 1 | 1 |
| Developer | Restock | RMS |
FAQ
Restokr and RMS Preorder & Back in Stock: common questions
- Is Restokr or RMS Preorder & Back in Stock cheaper?
- Both list a free plan. Paid plans start at $11/month for Restokr and $4.90/month for RMS Preorder & Back in Stock. Shoplist compares base prices only between monthly plans in the same currency; usage charges and annual plans vary, so check each plan’s limits.
- What features does each app list that the other doesn’t?
- RMS Preorder & Back in Stock lists 8 the others don’t mention, such as Alert settings, Auto-alerts, Custom alerts, Inventory tracking. A feature missing from a listing may still be supported; this compares what each App Store listing says.
- 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 Oct 13, 2026 for Restokr, Oct 22, 2026 for RMS Preorder & Back in Stock; estimated figures are labeled.
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 Oct 13, 2026 for Restokr, Oct 22, 2026 for RMS Preorder & Back in Stock. 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.