Payment Reminders Shopify Apps — Full Market Share Table
All tracked payment reminders 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 |  Preorder, Back In Stock ‑ STOQ | 59.84% | 0.10 | Climbing |
| 2 |  REZ Preorder, Back In Stock | 33.67% | 2.47 | Declining |
| 3 |  Brevo PushOwl: Email,Push,SMS | 2.92% | 1.59 | Climbing |
| 4 |  Preorder, Back in stock Duck | 1.50% | 1.29 | Climbing |
| 5 |  TxtCart AI: SMS Marketing | 0.84% | 0.70 | Climbing |
| 6 |  Omnisend Email Marketing & SMS | 0.33% | 0.56 | Declining |
| 7 |  Avada PDF Invoice Generator | 0.21% | 0.70 | Declining |
| 8 |  Mailchimp Email SMS Marketing | 0.18% | 0.00 | Declining |
| 9 |  Dibs – Preorders & Backorders | 0.17% | 0.06 | Climbing |
| 10 |  Kindly: Payment Reminder Pro | 0.15% | 0.00 | Climbing |
Showing 1-10 out of 23
Key Insights:
- Preorder, Back In Stock ‑ STOQ holds 59.8% share of payment reminders app installs — 26.2pp ahead of REZ Preorder, Back In Stock (33.7%).
- Top 3 apps (Preorder, Back In Stock ‑ STOQ, REZ Preorder, Back In Stock, Brevo PushOwl: Email,Push,SMS) account for 96.4% of all payment reminders install share — a concentrated market.
- Brevo PushOwl: Email,Push,SMS is gaining share fastest this month (+1.59pp) — the largest single gainer among the top payment reminders apps by share.
- REZ Preorder, Back In Stock is losing share fastest (-2.47pp) — could indicate a churning user base or a stronger challenger gaining ground.
Payment Reminders Shopify Apps — Market Share Over Time
Monthly market share trajectory for the top 5 payment reminders 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 | 62.0% | 34.8%27.15 | 30.5%4.30 | 30.8%0.31 | 69.5%38.65 | 59.8%9.64 |
| REZ Preorder, Back In Stock | 31.5% | 54.5%23.01 | 63.0%8.55 | 63.3%0.26 | 26.2%37.10 | 33.7%7.49 |
| Brevo PushOwl: Email,Push,SMS | 4.5% | 6.6%2.14 | 3.5%3.11 | 1.2%2.28 | 1.1%0.14 | 2.9%1.85 |
| Preorder, Back in stock Duck | 0.5% | 0.8%0.26 | 0.3%0.49 | 0.2%0.08 | 0.6%0.45 | 1.5%0.86 |
| TxtCart AI: SMS Marketing | 0.5% | 0.8%0.34 | 1.5%0.69 | 0.5%1.03 | 0.2%0.33 | 0.8%0.68 |
Key Insights:
- Preorder, Back In Stock ‑ STOQ's share contracted from 62.0% → 59.8% over the charted period.
- Of the top 5 tracked payment reminders apps, 3 grew share and 2 lost share — challengers are eating into leader's share.
Top Payment Reminders Shopify Apps by Country
Per-country market share rankings for payment reminders 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 | Preorder, Back In Stock ‑ STOQ | Preorder, Back In Stock ‑ STOQ | REZ Preorder, Back In Stock | REZ Preorder, Back In Stock | Preorder, Back In Stock ‑ STOQ |
| 2 | REZ Preorder, Back In Stock | REZ Preorder, Back In Stock | Preorder, Back In Stock ‑ STOQ | Preorder, Back In Stock ‑ STOQ | REZ Preorder, Back In Stock |
| 3 | Brevo PushOwl: Email,Push,SMS | TxtCart AI: SMS Marketing | Brevo PushOwl: Email,Push,SMS | TxtCart AI: SMS Marketing | Brevo PushOwl: Email,Push,SMS |
| 4 | Preorder, Back in stock Duck | Brevo PushOwl: Email,Push,SMS | Preorder, Back in stock Duck | Omnisend Email Marketing & SMS | Preorder, Back in stock Duck |
| 5 | TxtCart AI: SMS Marketing | Preorder, Back in stock Duck | Dibs – Preorders & Backorders |  SMSGo: Abandoned Cart Recovery | TxtCart AI: SMS Marketing |
Key Insights:
- Preorder, Back In Stock ‑ STOQ leads payment reminders apps in 2 of 4 tracked markets (United States, United Kingdom).
- Preorder, Back In Stock ‑ STOQ 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.
Top 5 Apps in Payment Reminders
- Preorder, Back In Stock ‑ STOQ — Leads payment reminders apps with 59.8% install share, rated 5.0★ — gaining share this month.
- REZ Preorder, Back In Stock — Holds 33.7% of payment reminders app install share, rated 5.0★ — losing share this month.
- Kindly: Payment Reminder Pro — Holds 0.1% of payment reminders app install share, rated 5.0★.
- Preorder, Back in stock Duck — Holds 1.5% of payment reminders app install share, rated 5.0★ — gaining share this month.
- Brevo PushOwl: Email,Push,SMS — Holds 2.9% of payment reminders app install share, rated 4.8★ — gaining share this month.
Payment Reminders Shopify Apps — Frequently Asked Questions
1. Which payment reminders app has the highest market share on Shopify?
Preorder, Back In Stock ‑ STOQ dominates the payment reminders category on Shopify with 59.8% of installs — 26.2pp 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 payment reminders Shopify apps?
For payment reminders (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 payment reminders apps are gaining market share on Shopify?
Brevo PushOwl: Email,Push,SMS is gaining payment reminders app market share fastest this month, up +1.59pp versus 30 days ago. Switch the table sub-tab to "Market Share Changes" to see all gainers ordered by movement.
4. Which payment reminders apps are losing market share on Shopify?
REZ Preorder, Back In Stock has lost the most market share this month among payment reminders apps (-2.47pp). Sort the table by Change (Low to High) to see the full list of decliners.
5. Which countries drive the most payment reminders Shopify app installs?
United States drives the largest share of payment reminders app installs at 35.0%, followed by United Kingdom at 11.0% and Australia at 9.8%. Use the country picker on the third card to compare market leaders by country.
6. How many payment reminders apps does ShopDigest track on Shopify?
ShopDigest tracks 95 payment reminders apps on the Shopify App Store. Market share, rankings, and review data refresh weekly so you can track competitive shifts as they happen.
