Out Of Stock Shopify Apps – Market Share Breakdown
(Updated September 2026) See which out of stock 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.
Out Of Stock Shopify Apps — Full Market Share Table
All tracked out of stock 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 | 81.71% | 2.36 | Declining |
| 2 |  Notify Me! Back in Stock Alert | 7.63% | 3.13 | Climbing |
| 3 |  Preorder, Back In Stock ‑ STOQ | 2.40% | 1.11 | Climbing |
| 4 |  MB Push Down Hide Out of Stock | 2.11% | 0.63 | Declining |
| 5 |  Preorder, Back In Stock REZ | 1.62% | 0.34 | Climbing |
| 6 |  Globo Product Options, Variant | 1.22% | 0.15 | Declining |
| 7 |  Easify Custom Product Options | 0.91% | 0.06 | Declining |
| 8 |  Sink | Push Down Out of Stock | 0.68% | 0.28 | Declining |
| 9 |  Hide & Push Down Out of Stock | 0.41% | 0.09 | Declining |
| 10 |  Nada • Hide Out of Stock | 0.37% | 0.20 | Climbing |
Showing 1-10 out of 23
Key Insights:
- Back In Stock,Notify Me: Kbite holds 81.7% share of out of stock app installs — 74.1pp ahead of Notify Me! Back in Stock Alert (7.6%).
- Top 3 apps (Back In Stock,Notify Me: Kbite, Notify Me! Back in Stock Alert, Preorder, Back In Stock ‑ STOQ) account for 91.7% of all out of stock install share — a fragmented market.
- Notify Me! Back in Stock Alert is gaining share fastest this month (+3.13pp) — the largest single gainer among the top out of stock apps by share.
- Back In Stock,Notify Me: Kbite is losing share fastest (-2.36pp) — could indicate a churning user base or a stronger challenger gaining ground.
Out Of Stock Shopify Apps — Market Share Over Time
Monthly market share trajectory for the top 5 out of stock Shopify apps over the past year — see who's gaining or losing install share month by month.
Charts Data
| App | Apr 2026 | May 2026 | Jun 2026 | Jul 2026 | Aug 2026 | Sep 2026 |
|---|---|---|---|---|---|---|
| Back In Stock,Notify Me: Kbite | 88.3%0.34 | 81.2%7.04 | 84.1%2.91 | 81.7%2.42 | 81.6%0.06 | 74.7%6.94 |
| Notify Me! Back in Stock Alert | 0.5%0.09 | 6.7%6.19 | 4.5%2.15 | 7.7%3.19 | 8.0%0.25 | 11.3%3.4 |
| MB Push Down Hide Out of Stock | 0.1%0.03 | 0.4%0.32 | 2.7%2.35 | 2.1%0.62 | 0.8%1.32 | 3.1%2.34 |
| Preorder, Back In Stock ‑ STOQ | 1.3%0.68 | 2.4%1.09 | 1.3%1.13 | 2.4%1.1 | 1.4%1 | 3.1%1.72 |
| Sink | Push Down Out of Stock | 0.9%0.31 | 3.0%2.06 | 1.0%2.04 | 0.6%0.33 | 3.1%2.45 | 2.4%0.73 |
Key Insights:
- Back In Stock,Notify Me: Kbite's share expanded from 70.1% → 74.7% over the charted period.
- Of the top 5 tracked out of stock apps, 5 grew share and 0 lost share — leader is widening the gap.
Top Out Of Stock Shopify Apps by Country
Per-country market share rankings for out of stock 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 out of stock apps in all 4 tracked markets — United States, India, China, United Kingdom.
⚠️ Data issue or feedback?
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Top 5 Apps in Out Of Stock
- MB Push Down Hide Out of Stock — Leads out of stock apps with 3.1% install share, rated 4.8★ — losing share this month.
- Sink | Push Down Out of Stock — Holds 2.3% of out of stock app install share, rated 5.0★.
- Back In Stock,Notify Me: Kbite — Holds 74.7% of out of stock app install share, rated 5.0★ — gaining share this month.
- Nada • Hide Out of Stock — Holds 0.3% of out of stock app install share, rated 4.8★ — gaining share this month.
- Hide & Push Down Out of Stock — Holds 0.6% of out of stock app install share, rated 4.1★ — losing share this month.
Out Of Stock Shopify Apps — Frequently Asked Questions
1. Which out of stock app has the highest market share on Shopify?
Back In Stock,Notify Me: Kbite ranks #1 by share among out of stock apps at 81.7%, but the market is fragmented — multiple apps capture meaningful share. Compare the top 5 on features and pricing before deciding.
2. How is market share calculated for out of stock Shopify apps?
For out of stock (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 out of stock apps are gaining market share on Shopify?
Notify Me! Back in Stock Alert is gaining out of stock app market share fastest this month, up +3.13pp versus 30 days ago. Switch the table sub-tab to "Market Share Changes" to see all gainers ordered by movement.
4. Which out of stock apps are losing market share on Shopify?
Back In Stock,Notify Me: Kbite has lost the most market share this month among out of stock apps (-2.36pp). Sort the table by Change (Low to High) to see the full list of decliners.
5. Which countries drive the most out of stock Shopify app installs?
United States drives the largest share of out of stock app installs at 36.1%, followed by United Kingdom at 11.1% and Canada at 7.0%. Use the country picker on the third card to compare market leaders by country.
6. How many out of stock apps does ShopDigest track on Shopify?
ShopDigest tracks 96 out of stock apps on the Shopify App Store. Market share, rankings, and review data refresh weekly so you can track competitive shifts as they happen.
7. Why does the highest-share out of stock app differ from the #1 ranked app?
Rank reflects an app's current position in the Shopify App Store under out of stock (driven by Shopify's own algorithm), while market share on ShopDigest is estimated from review counts and other factors as a proxy for active installs. The two metrics move on independent dynamics, so the highest-share app and the #1-ranked app are not always the same — and a divergence between them is worth noting rather than assuming one will pull the other along. For out of stock, Back In Stock,Notify Me: Kbite leads on share; see the rankings tab for who currently holds #1 position.
