Klaviyo Shopify Apps – Reviews & Rating Trends
(Updated September 2026) Compare reviews and ratings for klaviyo Shopify apps and see which apps are gaining the most install momentum. Review counts are the closest proxy to actual installs — Shopify doesn't publish install numbers — so review velocity is one of the strongest signals of merchant adoption for klaviyo apps.
Klaviyo Shopify Apps — Full Reviews Table
All tracked klaviyo Shopify apps ranked by total review count, with new reviews gained vs 30 days ago and average rating. Filter by country and date range; sort by reviews or review velocity.
| App | Reviews | Rating |
|---|---|---|
7,68177 | 5.0 | |
 Smile: Loyalty Program Rewards | 4,45078 | 4.8 |
 Preorder, Back In Stock ‑ STOQ | 3,512142 | 5.0 |
3,149114 | 4.6 | |
 Powerful Contact Form Builder | 2,38075 | 4.9 |
 Zapiet ‑ Pickup + Delivery | 1,80532 | 4.8 |
 Track123 Order Tracking | 1,67149 | 4.9 |
 Referral Candy & Affiliate | 1,4859 | 4.9 |
 Rivo: Loyalty Program, Rewards | 1,4468 | 4.9 |
 Okendo: Reviews & Loyalty | 1,39919 | 4.9 |
Showing 1-10 out of 86
Key Insights:
- SendWILL Popup Email Marketing leads klaviyo apps with 7,681 total reviews — 3,231 more than Smile: Loyalty Program Rewards (4,450).
- Top 3 apps (SendWILL Popup Email Marketing, Smile: Loyalty Program Rewards, Preorder, Back In Stock ‑ STOQ) hold 54.0% of all reviews across the top 10 tracked klaviyo apps.
- Preorder, Back In Stock ‑ STOQ is gaining reviews fastest this month (+142) — strong recent install momentum.
- 10 of 10 top-reviewed klaviyo apps gained new reviews this period; 0 saw no net additions.
Klaviyo Shopify Apps — Cumulative Review Trend
Monthly cumulative review count for the top 5 klaviyo Shopify apps over the past year — a longitudinal view of which apps keep accumulating reviews and which have flattened.
Charts Data
| App | Apr 2026 | May 2026 | Jun 2026 | Jul 2026 | Aug 2026 | Sep 2026 |
|---|---|---|---|---|---|---|
 SendWILL Popup Email Marketing | 7,447112 | 7,53689 | 7,60771 | 7,68780 | 7,75568 | 7,77621 |
| Smile: Loyalty Program Rewards | 4,20882 | 4,29587 | 4,37782 | 4,45578 | 4,54994 | 4,60758 |
| Preorder, Back In Stock ‑ STOQ | 3,037149 | 3,213176 | 3,376163 | 3,516140 | 3,642126 | 3,751109 |
 Klaviyo: Email Marketing & SMS | 2,62936 | 2,873244 | 3,038165 | 3,151113 | 3,256105 | 3,33781 |
| Powerful Contact Form Builder | 2,18664 | 2,23246 | 2,30977 | 2,38475 | 2,44460 | 2,52581 |
Key Insights:
- SendWILL Popup Email Marketing's cumulative reviews grew from 5,559 to 7,776 over the charted period — 2,217 new reviews accumulated.
- SendWILL Popup Email Marketing's 7,776 cumulative reviews sit 3.1× above Powerful Contact Form Builder's 2,525 at the bottom of the plotted klaviyo set — a wide spread between long-running leaders and newer entrants.
- SendWILL Popup Email Marketing's cumulative review lead compounds over time — an established review base acts as a trust signal for merchants comparing apps, and continued adoption keeps the review count climbing, a flywheel newcomers struggle to interrupt.
Fastest to 1,000 Reviews — Klaviyo Shopify Apps
Race-style view of how the top 5 klaviyo Shopify apps reached 1,000 reviews — months since launch on the X-axis, cumulative review count on the Y-axis. Adjust the milestone or app set with the filters above.
Charts Data
| App | Months to Reach 1,000 Reviews | Current Review Count |
|---|---|---|
| SendWILL Popup Email Marketing | 12 | 7,500 |
| Preorder, Back In Stock ‑ STOQ | 38 | 3,554 |
| Powerful Contact Form Builder | 63 | 2,364 |
| Smile: Loyalty Program Rewards | 80 | 4,233 |
| Klaviyo: Email Marketing & SMS | 114 | 3,027 |
Key Insights:
- SendWILL Popup Email Marketing reached 1,000 reviews fastest — in 12 months since launch.
- Preorder, Back In Stock ‑ STOQ crossed 1,000 reviews in 38 months — 26 months behind SendWILL Popup Email Marketing.
- All 5 apps in this set have crossed 1,000 reviews — months-to-1k ranges from 12 to 114, a 102-month spread.
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Most-Reviewed Klaviyo Shopify Apps
SendWILL Popup Email Marketing leads klaviyo Shopify apps with 7,681 cumulative reviews and a 5.0★ average rating. Smile: Loyalty Program Rewards (4,450 reviews) and Preorder, Back In Stock ‑ STOQ (3,512 reviews) round out the top 3. Combined, the top 3 apps hold 54.0% of all reviews across the top tier — a tight oligopoly where the leader's review flywheel is hard to break. Notable mover: Preorder, Back In Stock ‑ STOQ added the most new reviews this month (+142) — a strong recent install signal.
SendWILL Popup Email Marketing's 7,681-review base reflects long-running merchant adoption in klaviyo — a tenure signal for merchants who weight track record alongside current fit. Smile: Loyalty Program Rewards (4,450 reviews) and the rest of the top tier carry meaningful adoption too, and feature scope, support, and current trajectory often matter more than raw review totals when choosing between established options.
Klaviyo Shopify Apps — Long-Term Review Trends
SendWILL Popup Email Marketing accumulated 2,217 new reviews from Jan 2025 to Sep 2026, growing from 5,559 to 7,776 cumulative reviews — a steep addition rate for klaviyo apps. Across the top 5 plotted klaviyo apps, the steepest ongoing slopes mark the ones still actively winning new merchants — absolute review counts matter less than recent acceleration when picking apps in a category that's still growing.
SendWILL Popup Email Marketing's lead in cumulative reviews compounds in concentrated klaviyo categories: more reviews lift App Store rank, which drives more installs, which add more reviews — newcomers face a steep curve to catch up to the 7,776 cumulative base.
Review Growth Velocity in Klaviyo — Which Apps Grew Fastest
SendWILL Popup Email Marketing reached 1,000 reviews in 12 months since launch — the fastest ramp among the top 5 klaviyo apps tracked here. Preorder, Back In Stock ‑ STOQ in 38 months, Powerful Contact Form Builder in 63 months, Smile: Loyalty Program Rewards in 80 months, and Klaviyo: Email Marketing & SMS took 114 months to cross the same milestone, a 102-month spread between the fastest and slowest in the set.
All 5 apps in this set have crossed 1,000 reviews, with current cumulative counts now ranging from 2,364 (Powerful Contact Form Builder) to 7,500 (SendWILL Popup Email Marketing) — a 3.2× difference, showing how far ahead the leader has continued to build past the milestone.
The 102-month gap between SendWILL Popup Email Marketing's and Klaviyo: Email Marketing & SMS's time-to-1,000 highlights how unevenly product-market fit landed across this klaviyo set — the leader found its merchant audience early, while late-rampers took multiple years to reach the same review depth. For merchants comparing these apps today, slower-ramping apps may have closed the functionality gap but still operate on smaller review bases.
Top 5 Apps in Klaviyo
- Klaviyo: Email Marketing & SMS — Has accumulated 3,337 reviews for klaviyo at a 4.7★ average.
- Klaviyo: Product Reviews — Has accumulated 230 reviews for klaviyo at a 4.8★ average.
- Preorder, Back In Stock ‑ STOQ — Has accumulated 3,751 reviews for klaviyo at a 5.0★ average.
- SendWILL Popup Email Marketing — Has accumulated 7,776 reviews for klaviyo at a 4.9★ average.
- Smile: Loyalty Program Rewards — Has accumulated 4,607 reviews for klaviyo at a 4.9★ average.
Klaviyo Shopify Apps — Frequently Asked Questions
1. Which klaviyo app has the most reviews on Shopify?
SendWILL Popup Email Marketing has the most reviews among klaviyo Shopify apps with 7,681 total reviews, ahead of Smile: Loyalty Program Rewards at 4,450. Sort the table by Reviews (High to Low) to see the full ranked list.
2. How are reviews used to measure klaviyo app popularity on Shopify?
Reviews are the closest publicly available proxy for install volume on Shopify — Shopify doesn't publish install counts, so cumulative reviews and review velocity are the standard way to measure adoption. For klaviyo apps, this page shows total reviews, new reviews per month, and time-to-1,000 reviews so you can compare both established scale and current momentum.
3. Which klaviyo app is gaining reviews fastest on Shopify?
Preorder, Back In Stock ‑ STOQ is gaining the most new reviews this month among klaviyo apps, adding 142 reviews in the past 30 days. Switch the table sub-tab to "Review Changes" to see all apps ordered by review velocity.
4. Which klaviyo app reached 1,000 reviews fastest on Shopify?
SendWILL Popup Email Marketing hit 1,000 reviews in 12 months since launch — the fastest review ramp among tracked klaviyo Shopify apps. Use the "Fastest to 1,000 Reviews" chart above to compare against other apps or change the milestone (5,000, 10,000, etc.).
5. What is the average rating for top klaviyo Shopify apps?
The top 5 klaviyo apps average 4.9★ across 20,678 combined reviews — a strong overall quality benchmark. Individual ratings appear in the table above; sort by Reviews to see how rating varies across the most-installed apps.
6. How often are review counts for klaviyo apps updated on Shopify?
Review counts and rating data refresh weekly on this page. The Reviews Trend chart aggregates monthly intervals by default — switch to weekly granularity for shorter-term signals or yearly for macro trends.
