DiscountLock ‑ Protect Profit vs StackGuard: Combine Discounts
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Sep 28, 2026 for DiscountLock, Oct 30, 2026 for StackGuard.
The short answer
- Only StackGuard lists a free plan.
- StackGuard lists 11 features DiscountLock’s listing doesn’t mention, including Automations, BOGO, Bulk discounts.
Head to head
Free
- · "Why this price" decision trace
- · Cart-wide margin cap on every order
- · Product and collection targeting
- · Up to 3 percentage or fixed rules
Pro
- · BOGO, bundles, tiers, buy A get B
- · Code-gated rules and Exclusive mode
- · Everything in Free, unlimited rules
- · Per-item margin cap
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureShopify's native percentage discounts have no way to set a maximum discount amount. A "20 percent off" promotion on a $2,000 item gives $400 off — even if you intended a $50 cap. DiscountLock adds a maximum dollar cap to percentage discounts. Set your percentage and cap amount, and the discount is automatically clamped at checkout. Caps can apply per item or per order.
StackGuard lets you run overlapping promotions — percentage, fixed, BOGO, buy-A-get-B, mix-and-match bundles, and volume tiers — while a hard guardrail caps the total discount on every cart and item, so a stack can never cut below your margin floor. Every discount is explainable: a clear trace shows exactly which rules applied and why.
- Set a dollar limit on any percentage discount to protect your margins.
- Choose whether the cap applies to each line item or the entire order.
- Same familiar discount settings you already know, with the cap built in.
- Hard cap on total and per-item discount so stacks never break your margin
- 7 discount types: percentage, fixed, BOGO, buy-A-get-B, bundles, volume tiers
- Clear trace shows exactly which rules applied to every cart and why
- Exclusive mode stops outside discounts; auto-skip items already on sale
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 |  DiscountLock |  StackGuard |
|---|---|---|
| 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 | DiscountLock | StackGuard |
|---|---|---|
| App Store rating | 5.0 ★ | Not published |
| App Store reviews | 1 | 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 | DiscountLock | StackGuard |
|---|---|---|
| Free plan | Not listed | Yes |
| Lowest paid monthly plan | No monthly plan listed | $5/month |
| Longest free trial | Not listed | 30 days |
| Plans listed | Not published | 2 |
Listing
| Measure | DiscountLock | StackGuard |
|---|---|---|
| Shopify category rank | #171(ahead) | #1097 |
| Shopify App Charts | Not on this week’s charts | Not on this week’s charts |
| Built for Shopify | No | No |
| Launched | Mar 17, 2026 | Jul 7, 2026 |
| Languages | 1 | 1 |
| Developer | AKS Ecom | StackGuard |
FAQ
DiscountLock and StackGuard: common questions
- Is DiscountLock or StackGuard cheaper?
- Only StackGuard lists a free plan. 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?
- DiscountLock lists 2 the others don’t mention, such as Bulk editing, Custom code. StackGuard lists 11 the others don’t mention, such as Automations, BOGO, Bulk discounts, Cart discounts. 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 Sep 28, 2026 for DiscountLock, Oct 30, 2026 for StackGuard; 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 Sep 28, 2026 for DiscountLock, Oct 30, 2026 for StackGuard. 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.