Custom Rules Shopify Apps – Analytics & Insights

Discount Plus ‑ Custom Rules ranks #1 for custom rules with 0.2% share — the leader position in a fragmented field where many apps are within striking distance, -14.4pp ahead of MetaShop: Instagram & Facebook (14.7%). Kaching Bundles App & Upsells sits at #3 with 66.2% share, rounding out the top tier. Together, the top 3 apps absorb 81.1% of all custom rules installs — a highly concentrated landscape with limited room for new entrants. Multifeed Google Shopping Feed is the standout mover this month, climbing 9 positions — a momentum signal worth tracking. Worth noting: the top-ranked app and the highest-share app aren't the same here — App Store rank and our market share metric (computed from review counts and other factors) move on independent dynamics, so cross-checking both views matters in this category.

Custom Rules is a fragmented market — the top 3 apps together hold only 81.1% of installs, leaving Discount Plus ‑ Custom Rules's 0.2% lead modest in absolute terms and Kaching Bundles App & Upsells at 66.2% still capturing meaningful share. With this many viable apps, pricing model and integration depth differentiate custom rules options more than rank does.

Discount Plus ‑ Custom Rules held #1 steadily from May 2026 to Sep 2026 — an entrenched leader in custom rules that challengers haven't displaced. Across the top 5 plotted custom rules apps, 3 improved their ranking while 0 declined — the category is moving upward overall. Kaching Bundles App & Upsells's share expanded +31.2pp from 35.0% (May 2026) to 66.2% (Sep 2026) — a sustained widening of the gap against other custom rules apps over this window.

3 of 5 plotted custom rules apps moved positions in this window — recent trajectory beats current rank as a signal when a category is reshuffling this actively.

United States dominates demand for custom rules apps with 35.4% of all tracked installs — a single market that effectively defines the category's product priorities. United Kingdom follows at 7.4%, with Australia at 6.4%. Together, the top 3 markets account for 49.2% of custom rules app installs worldwide. Netherlands (6.2%) and France (4.6%) round out the top 5. Netherlands is the fastest-growing market this month (+2.9pp), pointing to accelerating demand outside the established leaders.

With 35.4% of custom rules app installs concentrated in United States, the leading apps in this category typically prioritize United States-based merchants for localization, currency, and support hours — merchants in United Kingdom (7.4%) and other regions sometimes find better fit in apps that over-index outside United States.

Kaching CartDrawer Cart Upsell reached 1,000 reviews in 17 months since launch — the fastest ramp among the top 5 custom rules apps tracked here. Kaching Bundles App & Upsells crossed the same milestone in 37 months, 20 months behind.

3 apps on this chart haven't yet crossed 1,000 reviews: TikTok Shop Integration — SPL at 774, MetaShop: Instagram & Facebook at 515, Discount Plus ‑ Custom Rules at 17 cumulative reviews. TikTok Shop Integration — SPL is closest to the milestone — its current count puts it roughly 77% of the way to 1,000.

The 20-month spread between Kaching CartDrawer Cart Upsell and Kaching Bundles App & Upsells reaching 1,000 reviews suggests a competitive custom rules category — leaders pulled ahead by roughly a year, but no single app dominated launch-to-milestone speed. The ramp differences likely reflect both product quality and timing-of-launch rather than one clear category winner.