Email Delivery Shopify Apps – Reviews & Rating Trends
(Updated September 2026) Compare reviews and ratings for email delivery 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 email delivery apps.
Email Delivery Shopify Apps — Full Reviews Table
All tracked email delivery 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 | |
3,149114 | 4.6 | |
 Omnisend Email Marketing & SMS | 3,13242 | 4.7 |
 Appointment Booking Cowlendar | 2,13746 | 5.0 |
 Zapiet ‑ Pickup + Delivery | 1,80532 | 4.8 |
 Appointment Booking App Apntly | 1,54342 | 5.0 |
 Digital Downloads PDF Pendora | 1,12685 | 5.0 |
 Shopify Digital Products | 1,076133 | 4.4 |
 Essent Estimated Delivery Date | 92253 | 5.0 |
 Appointment Booking App ointo | 89615 | 4.9 |
Showing 1-10 out of 70
Key Insights:
- SendWILL Popup Email Marketing leads email delivery apps with 7,681 total reviews — 4,532 more than Klaviyo: Email Marketing & SMS (3,149).
- Top 3 apps (SendWILL Popup Email Marketing, Klaviyo: Email Marketing & SMS, Omnisend Email Marketing & SMS) hold 59.5% of all reviews across the top 10 tracked email delivery apps.
- Shopify Digital Products is gaining reviews fastest this month (+133) — strong recent install momentum.
- 10 of 10 top-reviewed email delivery apps gained new reviews this period; 0 saw no net additions.
Email Delivery Shopify Apps — Cumulative Review Trend
Monthly cumulative review count for the top 5 email delivery 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 |
|---|---|---|---|---|---|---|
 Klaviyo: Email Marketing & SMS | 2,62936 | 2,873244 | 3,038165 | 3,151113 | 3,256105 | 3,33781 |
| Appointment Booking Cowlendar | 1,99074 | 2,03545 | 2,09257 | 2,14048 | 2,20262 | 2,24644 |
| Zapiet ‑ Pickup + Delivery | 1,66275 | 1,70543 | 1,77772 | 1,80629 | 1,85650 | 1,88630 |
| Appointment Booking App Apntly | 1,40636 | 1,45145 | 1,50150 | 1,54544 | 1,58237 | 1,62341 |
| Shopify Digital Products | 495250 | 745250 | 949204 | 1,082133 | 1,198116 | 1,28284 |
Key Insights:
- Klaviyo: Email Marketing & SMS's cumulative reviews grew from 1,776 to 3,337 over the charted period — 1,561 new reviews accumulated.
- Klaviyo: Email Marketing & SMS's 3,337 cumulative reviews sit 2.6× above Shopify Digital Products's 1,282 at the bottom of the plotted email delivery 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 — Email Delivery Shopify Apps
Race-style view of how the top 5 email delivery 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 |
| Appointment Booking Cowlendar | 34 | 2,190 |
| Omnisend Email Marketing & SMS | 92 | 2,964 |
| Klaviyo: Email Marketing & SMS | 114 | 3,027 |
| Zapiet ‑ Pickup + Delivery | 118 | 1,808 |
Key Insights:
- SendWILL Popup Email Marketing reached 1,000 reviews fastest — in 12 months since launch.
- Appointment Booking Cowlendar crossed 1,000 reviews in 34 months — 22 months behind SendWILL Popup Email Marketing.
- All 5 apps in this set have crossed 1,000 reviews — months-to-1k ranges from 12 to 118, a 106-month spread.
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Most-Reviewed Email Delivery Shopify Apps
SendWILL Popup Email Marketing leads email delivery Shopify apps with 7,681 cumulative reviews and a 5.0★ average rating. Klaviyo: Email Marketing & SMS (3,149 reviews) and Omnisend Email Marketing & SMS (3,132 reviews) round out the top 3. Combined, the top 3 apps hold 59.5% of all reviews across the top tier — a tight oligopoly where the leader's review flywheel is hard to break. Notable mover: Shopify Digital Products added the most new reviews this month (+133) — a strong recent install signal.
SendWILL Popup Email Marketing's 7,681-review base reflects long-running merchant adoption in email delivery — a tenure signal for merchants who weight track record alongside current fit. Klaviyo: Email Marketing & SMS (3,149 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.
Email Delivery Shopify Apps — Long-Term Review Trends
Klaviyo: Email Marketing & SMS accumulated 1,561 new reviews from Jan 2025 to Sep 2026, growing from 1,776 to 3,337 cumulative reviews — a steep addition rate for email delivery apps. Across the top 5 plotted email delivery 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.
Klaviyo: Email Marketing & SMS's lead in cumulative reviews compounds in concentrated email delivery 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 3,337 cumulative base.
Review Growth Velocity in Email Delivery — Which Apps Grew Fastest
SendWILL Popup Email Marketing reached 1,000 reviews in 12 months since launch — the fastest ramp among the top 5 email delivery apps tracked here. Appointment Booking Cowlendar in 34 months, Omnisend Email Marketing & SMS in 92 months, Klaviyo: Email Marketing & SMS in 114 months, and Zapiet ‑ Pickup + Delivery took 118 months to cross the same milestone, a 106-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 1,808 (Zapiet ‑ Pickup + Delivery) to 7,500 (SendWILL Popup Email Marketing) — a 4.1× difference, showing how far ahead the leader has continued to build past the milestone.
The 106-month gap between SendWILL Popup Email Marketing's and Zapiet ‑ Pickup + Delivery's time-to-1,000 highlights how unevenly product-market fit landed across this email delivery 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 Email Delivery
- Appointment Booking Cowlendar — Has accumulated 2,246 reviews for email delivery at a 4.9★ average.
- Appointment Booking App Apntly — Has accumulated 1,623 reviews for email delivery at a 5.0★ average.
- AG Order Printer ‑ PDF Invoice — Has accumulated 709 reviews for email delivery at a 4.9★ average.
- Digital Downloads PDF Pendora — Has accumulated 1,234 reviews for email delivery at a 5.0★ average.
- Digital Downloads ‑ Fileflare — Has accumulated 186 reviews for email delivery at a 4.8★ average.
Email Delivery Shopify Apps — Frequently Asked Questions
1. Which email delivery app has the most reviews on Shopify?
SendWILL Popup Email Marketing has the most reviews among email delivery Shopify apps with 7,681 total reviews, ahead of Klaviyo: Email Marketing & SMS at 3,149. Sort the table by Reviews (High to Low) to see the full ranked list.
2. How are reviews used to measure email delivery 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 email delivery 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 email delivery app is gaining reviews fastest on Shopify?
Shopify Digital Products is gaining the most new reviews this month among email delivery apps, adding 133 reviews in the past 30 days. Switch the table sub-tab to "Review Changes" to see all apps ordered by review velocity.
4. Which email delivery 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 email delivery 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 email delivery Shopify apps?
The top 5 email delivery apps average 4.8★ across 17,489 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 email delivery 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.
