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Shopify appwhat they say

Cart Lock

Cart Lock: Block Checkout Rules

Cart Lock validates orders on Shopify using custom rules like cart total, discount, shipping countries, customers etc for checkout, cart, and product pages.

★★★★★4.8 (87)
$6.99/moEssential$9.99/moProfessional$19.99/moElite
Website ↗ Shopify App Store ↗
what mrrlens sees
MRR · Estimated$639–4k
Opportunity—
Buyer threads · 30 d0
“No free plan, they mislead the users by having a free plan, but then you find out it's for dev stores only.”
#1 complaint · Pricing · 3 of 3 complaints read · analysed Oct 31, 2026 · source

01Revenue

$639–4k

A month · the formula and every input are below

How this range is computed

reviews × installs-per-review × paying share × entry price

  • reviews: 87
  • entry price: $7
  • 7–20 active installs per published review (measured: median 12 on the 20 most-installed apps)
  • 15%–35% of installs on a paid plan

A range from public signals and the listed price, not a claim about the company’s books. Methodology.

Store data from the Shopify App Store listing, refreshed daily. Updated 10 h ago. Listed since 2024.

02Why users leave Cart Lock

Pricing3 reviews · 3 of 3

Free plan is dev-store-only, which misleads live merchants; $9/month just to block one customer is seen as excessive.

“No free plan, they mislead the users by having a free plan, but then you find out it's for dev stores only.” source ↗

Sample: 3 recent complaints (1–3★ reviews) · clustered Oct 31, 2026 · complaints from Aug 2025–Jan 2026, almost all in the last 24 months · each review labelled by a model, quotes verbatim

03How to build a better Cart Lock

Build difficultyMediumShopify app approval and checkout/cart API constraints; rule engine is simple, but platform compliance and pricing trust matter.
Three build ideas that answer these complaintsIncluded in the day pass and Pro.
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04Who wants a better Cart Lock

0 buyer threads in the last 30 days name Cart Lock.

05Questions about Cart Lock

How much revenue does Cart Lock make?

MRRLens estimates Cart Lock at $639–4k a month (low confidence). The range comes from public signals (reviews × installs-per-review × paying share × entry price), not from the company's books; the formula and its inputs are shown on this page.

What do users complain about most in Cart Lock?

Across 3 recent complaints, the most common is pricing (3 of 3). Free plan is dev-store-only, which misleads live merchants; $9/month just to block one customer is seen as excessive.

What are the best Cart Lock alternatives?

The closest alternatives MRRLens found are Cart & Checkout Limit ‑ DMJ, CC Order Rules Limits&Preorder and Evlop ‑ Order Limits [Min, Max]. The full list, with why users leave, is on the Cart Lock alternatives page.

See the full x-ray of Cart Lock

Full 1-star breakdown with verbatim quotes, the build blueprint and every live thread — on every product.