Custom Alerts Shopify Apps – Market Share Breakdown
(Updated October 2026) See which custom alerts Shopify apps dominate installs and how their share has shifted over time. This keyword page shows the full market share table, monthly share trends for the leaders, and a country-level breakdown so you can compare global vs regional dominance.
Custom Alerts Shopify Apps — Full Market Share Table
All tracked custom alerts Shopify apps ranked by current install share, with change vs 30 days ago and Leader / Climbing / Declining / Stable status — filterable by country and date range.
| # | App | Market Share | Change | Status |
|---|---|---|---|---|
| 1 |  Back In Stock,Notify Me: Kbite | 39.75% | 1.01 | Declining |
| 2 |  REZ Preorder, Back In Stock | 31.66% | 1.76 | Climbing |
| 3 |  Notify Me! Back in Stock Alert | 14.27% | 0.24 | Climbing |
| 4 |  Preorder, Back In Stock ‑ STOQ | 10.22% | 0.74 | Declining |
| 5 |  PreOrder Globo | Back in Stock | 2.22% | 0.15 | Declining |
| 6 |  Essent Preorder Back in Stock | 1.41% | 0.12 | Declining |
| 7 |  Stockie Inventory Management | 0.15% | 0.04 | Climbing |
| 8 |  Preorder, Back in stock Duck | 0.15% | 0.02 | Declining |
| 9 |  Easyteam POS Time Clock In | 0.04% | 0.01 | Declining |
| 10 |  XFlow Back in Stock Alert | 0.03% | 0.01 | Climbing |
Showing 1-10 out of 23
Key Insights:
- Back In Stock,Notify Me: Kbite holds 39.7% share of custom alerts app installs — 8.1pp ahead of REZ Preorder, Back In Stock (31.7%).
- Top 3 apps (Back In Stock,Notify Me: Kbite, REZ Preorder, Back In Stock, Notify Me! Back in Stock Alert) account for 85.7% of all custom alerts install share — a concentrated market.
- REZ Preorder, Back In Stock is gaining share fastest this month (+1.76pp) — the largest single gainer among the top custom alerts apps by share.
- Back In Stock,Notify Me: Kbite is losing share fastest (-1.01pp) — could indicate a churning user base or a stronger challenger gaining ground.
Custom Alerts Shopify Apps — Market Share Over Time
Monthly market share trajectory for the top 5 custom alerts Shopify apps over the past year — see who's gaining or losing install share month by month.
Charts Data
| App | May 2026 | Jun 2026 | Jul 2026 | Aug 2026 | Sep 2026 | Oct 2026 |
|---|---|---|---|---|---|---|
| Preorder, Back In Stock ‑ STOQ | 50.5% | 10.9%39.61 | 10.1%0.81 | 10.1%0.06 | 47.9%37.84 | 46.7%1.17 |
| Back In Stock,Notify Me: Kbite | 21.3% | 40.8%19.5 | 39.6%1.1 | 41.3%1.67 | 23.4%17.92 | 23.0%0.39 |
| Notify Me! Back in Stock Alert | 7.0% | 14.1%7.07 | 14.4%0.38 | 24.3%9.9 | 15.8%8.49 | 15.9%0.1 |
| REZ Preorder, Back In Stock | 16.3% | 29.9%13.62 | 31.7%1.73 | 19.9%11.77 | 7.8%12.16 | 10.1%2.32 |
| PreOrder Globo | Back in Stock | 1.2% | 2.3%1.16 | 2.2%0.11 | 2.5%0.23 | 3.3%0.8 | 2.4%0.86 |
Key Insights:
- Preorder, Back In Stock ‑ STOQ's share contracted from 50.5% → 46.7% over the charted period.
- Of the top 5 tracked custom alerts apps, 3 grew share and 2 lost share — challengers are eating into leader's share.
Top Custom Alerts Shopify Apps by Country
Per-country market share rankings for custom alerts Shopify apps across 5 markets — see which apps lead in each country and where regional leaders diverge from the global leader.
| # | 🌎 Worldwide |  United States |  India |  China |  United Kingdom |
|---|---|---|---|---|---|
| 1 | | | | | |
| 2 | | | | | |
| 3 | | | | | |
| 4 | | | | | |
| 5 | | | |  | |
Key Insights:
- Back In Stock,Notify Me: Kbite leads custom alerts apps in 2 of 4 tracked markets (United States, United Kingdom).
- Back In Stock,Notify Me: Kbite leads worldwide, but 2 of 4 tracked markets crown a different leader — REZ Preorder, Back In Stock in India, REZ Preorder, Back In Stock in China.
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Top 5 Apps in Custom Alerts
- Preorder, Back In Stock ‑ STOQ — Leads custom alerts apps with 46.7% install share, rated 5.0★ — gaining share this month.
- Back In Stock,Notify Me: Kbite — Holds 23.0% of custom alerts app install share, rated 5.0★ — losing share this month.
- Notify Me! Back in Stock Alert — Holds 15.9% of custom alerts app install share, rated 4.9★ — losing share this month.
- REZ Preorder, Back In Stock — Holds 10.1% of custom alerts app install share, rated 5.0★ — losing share this month.
- PreOrder Globo | Back in Stock — Holds 2.4% of custom alerts app install share, rated 4.9★ — losing share this month.
Custom Alerts Shopify Apps — Frequently Asked Questions
1. Which custom alerts app has the highest market share on Shopify?
Back In Stock,Notify Me: Kbite dominates the custom alerts category on Shopify with 39.7% of installs — 8.1pp ahead of REZ Preorder, Back In Stock. This is a clear leader by share, so most merchants default to it unless they have a niche-fit reason to pick differently.
2. How is market share calculated for custom alerts Shopify apps?
For custom alerts (a keyword page), market share is rank-weighted — apps at position #1 carry roughly 40× the weight of apps at position #22, and apps beyond #22 are excluded. Each app's weighted score is divided by the total weighted score across the keyword to give the share %. This reflects Shopify search behaviour: most installs come from the top of the results.
3. Which custom alerts apps are gaining market share on Shopify?
REZ Preorder, Back In Stock is gaining custom alerts app market share fastest this month, up +1.76pp versus 30 days ago. Switch the table sub-tab to "Market Share Changes" to see all gainers ordered by movement.
4. Which custom alerts apps are losing market share on Shopify?
Back In Stock,Notify Me: Kbite has lost the most market share this month among custom alerts apps (-1.01pp). Sort the table by Change (Low to High) to see the full list of decliners.
5. Which countries drive the most custom alerts Shopify app installs?
United States drives the largest share of custom alerts app installs at 36.4%, followed by United Kingdom at 10.5% and Australia at 9.5%. Use the country picker on the third card to compare market leaders by country.
6. How many custom alerts apps does ShopDigest track on Shopify?
ShopDigest tracks 96 custom alerts apps on the Shopify App Store. Market share, rankings, and review data refresh weekly so you can track competitive shifts as they happen.
