- Amp rates 4.9 stars across 817 reviews on the Shopify App Store, one of the stronger aggregate scores in its category.
- Pricing runs four tiers: Free, $19/month, $49/month, and $99/month.
- The free plan includes core back-in-stock alerts and multi-language support, not just a limited trial.
01 What Is Amp: Back in Stock & PreOrder+?
Install Amp: Back in Stock & PreOrder+. It holds a 4.9-star rating across 817 reviews on the Shopify App Store and pairs that with a genuinely usable free plan, which makes it a low-risk pick for back-in-stock and preorder alerts. Upgrade past free only once your notification volume actually demands it.
Amp is a single app that handles two related jobs: emailing/texting customers when a sold-out item restocks, and taking orders on items that haven't shipped yet (true preorder checkout, not just a waitlist). Both live in one dashboard rather than as separate installs. The app is fully app-embed / Shopify 2.0-based, and its listing promises "set up in minutes, no code needed" — which holds up: there's no manual theme.liquid editing required to get a "Notify Me" or preorder button live.
02 Key Features: Back-in-Stock Alerts, Preorders & PreOrder+
The core alert system covers email, SMS, and web push, triggered automatically when inventory returns. PreOrder+ sits alongside it and lets a store sell products before they're in stock — the app processes payment at checkout rather than just collecting an email address, which is the meaningful difference between "preorder" and "notify me" in most competing apps. Beyond the two headline features, Amp includes wishlists, low-stock alerts, and demand/inventory analytics that show which out-of-stock products are generating the most signup interest.
- Back-in-stock alerts — email, SMS, and web push, triggered automatically on restock, with a customizable "Notify Me" button that matches store branding.
- PreOrder+ — full checkout and payment capture for unreleased or backordered inventory, not a waitlist.
- Demand analytics — reporting on which sold-out SKUs are driving the most notification signups, useful for restock prioritization.
- Multi-language support — included even on the free plan.
03 Pricing: Free Plan Through $99/Month
Amp's pricing runs four tiers: Free, $19/month, $49/month, and $99/month.
| Plan | Price |
|---|---|
| Free | $0 |
| Paid | $19/mo |
| Paid | $49/mo |
| Paid | $99/mo |
04 What the App Store Reviews Say
Amp holds a 4.9-star average across 817 reviews on the Shopify App Store — one of the stronger aggregate scores in the back-in-stock and preorder category.
05 Final Verdict: Is Amp Worth Installing?
Install Amp: Back in Stock & PreOrder+. A 4.9-star average across 817 reviews and a free plan that's actually usable rather than a crippled trial add up to a low-risk install for most stores dealing with stockouts. Start free and move to a paid tier once your notification volume outgrows it.
07 Frequently asked questions
- Is Amp: Back in Stock & PreOrder+ free to use?
- Yes — Amp offers a free plan alongside paid tiers at $19, $49, and $99 per month.
- What does Amp: Back in Stock & PreOrder+ do?
- It combines back-in-stock alerts (email, SMS, web push) with PreOrder+, which lets customers pay at checkout for items that haven't shipped yet, rather than just joining a waitlist.
- Does Amp require coding to set up?
- No. Amp is app-embed and Shopify 2.0-based, so Notify Me and preorder buttons can be added without editing theme code.
- How many reviews does Amp have on the Shopify App Store?
- Amp holds a 4.9-star average across 817 reviews as of this writing.