Heartstrong Sleep emails
Heartstrong Sleep sends about 1 email a week through Klaviyo, most often on Thursday around 7 PM Eastern.
Early figures, based on 12 emails received from Jun 18 to Oct 18, 2026.
- ESP
- Klaviyo
- Emails a week
- about 1
- Busiest send time
- Thursdays at 7pm ET
- Last sent
- 11 days ago · Oct 18
- Tracked since
- Jun 2026
- Emails collected
- 12
Recent emails
Oct 18, 2026 11:30 AM
Meet Your New Favorite CPAP Pillow! 💤
Oct 15, 2026 4:30 AM
Meet your newest CPAP comfort essentials
Oct 14, 2026 1:57 PM
Offer for your CPAP Machine
Recent subject lines
All subject linesSubject lines average 40 characters. Each one opens the email it came from.
| Picture | Sent (Eastern) | Subject | Preview text |
|---|---|---|---|
| Oct 18, 2026 11:30 AM | Meet Your New Favorite CPAP Pillow! 💤 | Explore new Lunderg Parkin pillows for softer comfort at home and on the go. | |
| Oct 15, 2026 4:30 AM | Meet your newest CPAP comfort essentials | Explore new Lunderg Parkin pillows for softer comfort at home and on the go. | |
| Oct 14, 2026 1:57 PM | Offer for your CPAP Machine | Hi , Thank you for contacting Heartstrong Sleep and expressing interest in reprocessing… | |
| Aug 20, 2026 8:15 PM | Experience Care from Fellow CPAP Users! | The Dream Team at Heartstrong Sleep | |
| Aug 6, 2026 7:04 PM | What's New and What's Loved at Heartstrong | A fresh look at the sleep therapy essentials our community is shopping this month. | |
| Aug 2, 2026 7:01 PM | Fit Check : Find Your Perfect CPAP Mask! | Comfort, seal, and consistency: small changes with big impact. | |
| Jul 30, 2026 7:00 PM | Fit Check : A Better Night's Sleep Starts With the Right Fit | Comfort, seal, and consistency: small changes with big impact. | |
| Jul 23, 2026 7:02 PM | Keep Your Therapy Running Smoothly | Fresh cushions, delivered on your schedule. Save with Cushion Club. |
When Heartstrong Sleep sends
42% of its emails arrive in the 7 PM hour, with a second, smaller wave around 4 AM. Thursdays are the busiest day.
| 12a | 1a | 2a | 3a | 4a | 5a | 6a | 7a | 8a | 9a | 10a | 11a | 12p | 1p | 2p | 3p | 4p | 5p | 6p | 7p | 8p | 9p | 10p | 11p | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mon | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Tue | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Wed | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Thu | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 4 | 1 | 0 | 0 | 0 |
| Fri | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Sat | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Sun | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
| Mon | Tue | Wed | Thu | Fri | Sat | Sun | |
|---|---|---|---|---|---|---|---|
| 12a | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1a | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 2a | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 3a | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 4a | 0 | 0 | 0 | 2 | 0 | 0 | 0 |
| 5a | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 6a | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 7a | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 8a | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 9a | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 10a | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 11a | 0 | 0 | 0 | 0 | 0 | 1 | 1 |
| 12p | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1p | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
| 2p | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
| 3p | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 4p | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 5p | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 6p | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 7p | 0 | 0 | 0 | 4 | 0 | 0 | 1 |
| 8p | 0 | 0 | 0 | 1 | 0 | 0 | 0 |
| 9p | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 10p | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 11p | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
FewerMore(busiest cell: 4 emails)
Based on 12 emails received from Jun 18 to Oct 18, 2026. Times in US Eastern. How we collect · When all brands send
How often Heartstrong Sleep sends
The one complete month so far had 3 emails. September was not collected, so it is drawn as a gap and left out.
- Busiest month
- Jul 2026, 3
- Quietest month
- Jul 2026, 3
- Busiest day
- Thursday, 7
- Quietest day
- Monday, 0
About Heartstrong Sleep
- ESP
- Klaviyo
- Tracked since
- Jun 2026
- Emails collected
- 12
- Emails a week
- about 1
- Last sent
- Oct 18, 2026
- Sends from
- hss@
mail.heartstrongsleep.com - Subject length
- 40 characters avg
Counts include automated emails such as a welcome series.
Similar sending frequency
| Latest email | Brand | ESP | Website popularity | Emails a week | Busiest day | Last sent | |
|---|---|---|---|---|---|---|---|
 #GoKindlygokindly.com.au | Klaviyo | about 1 | Saturday | Oct 24, 2026 | Klaviyo · about 1 a week · busiest Saturday · last sent Oct 24, 2026 | ||
 1886 fashion1886fashion.com | Klaviyo | about 1 | Wednesday | Oct 21, 2026 | Klaviyo · about 1 a week · busiest Wednesday · last sent Oct 21, 2026 | ||
 4T2D4t2d.com | Klaviyo | about 1 | Thursday | Oct 28, 2026 | Klaviyo · about 1 a week · busiest Thursday · last sent Oct 28, 2026 |
Report an errorLast updated Oct 30, 2026