Cart Reserve: Stock Hold Timer

Name: Cart Reserve: Stock Hold Timer
Brand: R3stack
Rating: 5.0 (4 reviews)

Pricing: From $19/month. Free trial available.
Rating: 5.0 (4)
Developer: R3stack

The instant a shopper adds to cart, the unit is theirs. AI blocks bots. No more oversells.

Overselling kills drops. You sell 500 units, refund 80, and 80 customers turn on you publicly. Cart Reserve fixes it at the source: the moment a shopper adds an item, that unit is held for them — and a tamper-proof checkout keeps it held, so it can't be bypassed by blocking scripts, forging cart tokens, or hitting the API directly. AI scores every cart-add and blocks bots before they drain stock. Expired carts auto-release inventory — no manual cleanup. Set per-product hold times, watch live act

Real inventory holds — the moment a shopper adds, that unit is theirs.
Tamper-proof checkout that scripts, forged tokens, and the API can't bypass.
AI scores every cart-add and blocks scalper bots before they drain stock.
Auto-release expired carts — no oversold orders, no manual cleanup.
Live dashboard tracks active carts, save rate, and stock health in real time.

Languages

English

Works with

Checkout
Shopify Admin

Pricing

Choose the plan that best fits your business.

Starter

$19 / month

or $190/year and save 17%

Features

Unlimited reservations
25 concurrent active holds
Real inventory holds — always-on
Rule-based bot protection
Fair queue during high-traffic drops
7-day analytics window
1-day session retention
14-day money-back guarantee

14-day free trial

Pro

$39 / month

or $390/year and save 17%

Features

Unlimited reservations
500 concurrent active holds
No waiting room — smooth drops
Real inventory holds — always-on
AI-powered bot protection
2 scheduled drops/mo
Block up to 10 IPs
14-day session retention

14-day free trial

Max

$79 / month

or $790/year and save 17%

Features

Unlimited reservations
2,000 concurrent active holds
No waiting room — smooth drops
AI-powered bot protection
Scheduled drops — BETA, unlimited
Block 100 IPs + 50 countries
90-day retention · global stock limits
14-day session retention

14-day free trial

All charges are billed in USD. Recurring and usage-based charges are billed every 30 days.

Reviews (4)

Overall rating

Counts per rating level

100% of ratings are 5 stars
4
0% of ratings are 4 stars
0% of ratings are 3 stars
0% of ratings are 2 stars
0% of ratings are 1 stars

All reviews

July 9, 2026

Excellent service, Cart reserve works well with our shop., We had a few issues and Adam at support not only was on the case immediately he implements changes and also partnered with us and helped set the design on our web site then tested all pages to make sure everything was working correctly.
After service is brilliant and the product works very well. I recommend this app highly and will be using constantly.

TheHumFromTheHill

United Kingdom

28 days using the app

July 9, 2026

This app is the BEST cart reserve app I've used. It works as you WANT it to and looks really pretty too.

I have tried EIGHT different cart reservation apps before this one, but they were always focused on driving sales and not ACTUALLY saving the cart so my customers have time to check out.

Adam reached out to me, and i've been working closely with him since. The app is near perfect, the support is insanely prompt and detailed, and you can tell Adam has a lot of experience and passion for this. Take it from me and don't waste your time with any other "cart reserve" app as they don't actually reserve the cart.

This app is a god send for small business such as myself who handmake everything and only have limited stock on restocks which sell out quickly!

1 million / 10 reccomend

The Frame Game AU

Australia

14 days using the app

June 15, 2026

World-Class Support from Adam! Brilliant App, Just Mind Extreme Flash-Sale Use Cases

I am leaving this review to highly commend Adam from the tech support team, who provided some of the best, most responsive customer service I have ever experienced on Shopify. He went above and beyond to help us configure the app.

The app itself is beautifully designed, highly intuitive, and I have no doubt it works flawlessly for the vast majority of standard retail stores looking to reduce cart abandonment.

The only reason we ultimately had to uninstall is due to our highly unique, high-velocity business model. We run high-demand product "drops" where hundreds of customers flood the checkout at the exact same millisecond. In these extreme, high-traffic spikes, we found the reservation system couldn't quite keep pace with Shopify's core inventory servers, leading to a few checkout mismatches for our buyers.

While it wasn’t the right fit for our specific flash-sale chaos, I cannot fault the app's build or the incredible support team behind it. If you run a standard e-commerce store, this app is fantastic. Huge thanks again to Adam for all his hard work and dedication!

Jukupop

United Kingdom

5 days using the app

R3stack replied June 18, 2026

Thank you for such a thoughtful and fair review, it really means a lot.

You're right that the version you used wasn't built for hundreds of simultaneous checkouts on the same product. A major update is in progress that redesigns how reservations interact with Shopify's inventory system, specifically for high-concurrency flash sales like yours.

When it's live, the door is always open — I'd love for you to give it another try. Thanks again for the kind words and for helping make the app better.

Adam — Cart Reserve