R3Stack
ONBOARDING · ~5 MINUTES

Set up Cart Reserve in five steps

From install to your first protected drop. No code, no developer — just flip it on.

Install on Shopify See the steps
01 Install→02 Approve→03 Hold timer→04 Enable→05 Live
STEP 01

Install from the App Store

Open our Shopify App Store listing and hit Add app. Free to start — no credit card required.

Open the listing
FIND ITShopify App Store → search "Cart Reserve" → Add app
Cart Reserve
by R3Stack · Inventory
★★★★★Built for drops
Hold stock when shoppers add to cart. Block bots. Auto-release expired carts.
Add appInstalling…✓ Installed
Install Cart Reserve
This app needs access to:
✓View products & inventory
✓Manage cart reservations
✓Read checkout sessions
✓Connected to your store
InstallConnecting…✓ Done
STEP 02

Approve & connect

Review the permissions and click Install. Cart Reserve connects to your store in seconds — no setup call, no onboarding form.

FIND ITInstall Cart Reserve → review access → Install
STEP 03

Set your hold timer

Use the Session Timer slider to choose how long a cart holds stock — anywhere from 5 to 60 minutes. Turn on Allow Timer Extension so shoppers who need more time can add it.

FIND ITSettings → Reservation Settings → Session Timer
RESERVE SETTINGS
Hold time
5 min
10 min
15 min
AI bot protection
HOLD05:0010:00
THEME · APP EMBEDS
Cart Reserve
Disabled● Enabled
No code. The widget appears in your cart automatically.
✓Saved
STEP 04

Enable the app embed

Flip on the Cart Reserve embed in your theme and Save. This activates the storefront timer — it shows up in your cart automatically, with no theme code.

FIND ITOnline Store → Themes → Customize → App embeds → Cart Reserve → Save
REQUIRED · DON'T SKIP
Then add a checkout rule

Holds the reservation through to payment. Without it, reservations aren't held.

FIND ITSettings → Checkout → Checkout rules → Add rule → Active
STEP 05 · LIVE

Protect your products & go live

Add the products you want to protect, hit Enable, and set Max per session. Use 1 to hold just the last available unit per shopper. Then run your next drop — stock holds the moment a shopper adds to cart.

FIND ITCart Reserve → Products → Enable → Max per session
Protection active
Cart1
×
Air Max '90 — OG Drop
$160.00
Items Reserved
Held just for you
TIME LEFT
09:59
✓ Protected at checkout
AFTER INSTALL

Choose your subscription

Pick a plan inside the app. Every plan starts with a free trial — you won't be charged until it ends.

STARTER
$9/mo
Choose Starter
1,000 reservations/mo100 concurrent reservationsTimer holds1-day session retention
RECOMMENDED
PRO
$29/mo
Choose Pro
Unlimited reservations*1,000 concurrent reservationsReal inventory holds NEW30-day session retention24hr email support
MAX
$79/mo
Choose Max
Unlimited reservations*3,000 concurrent reservationsReal inventory holdsScheduled Drops BETAAI Insights90-day session retention4hr support SLA

Unlimited reservations on PRO & MAX (fair use) · +3 months free when you subscribe through our link · 30-day money-back.

No code, ever
Works with your existing theme & checkout. Nothing to deploy.
Set up in ~5 min
Install, configure your timer, flip it on. Done before your next drop.
Help when you need it
Stuck? Email adam@r3stack.io — a founder replies.
WE'LL SET IT UP FOR YOU

Want us to configure it?

Add R3Stack as a staff collaborator on your Shopify store and we'll install Cart Reserve, tune your hold timers, and run a test drop — free. You stay in full control and can remove access anytime.

ADD US AS A COLLABORATOR
1
In Shopify admin, go to Settings → Users and permissions
2
Under Collaborators, click Add collaborator
3
Send the request to adam@r3stack.io
✓
We accept & set everything up — usually same day

Ready? Install Cart Reserve

Five steps, five minutes, zero oversells.

Install free on Shopify
No credit card · 30-day money-back