iSLEEP, also known as iSleep HST and found at isleephst.com, and Lofta are both US direct-to-consumer companies that offer at-home sleep apnea testing using the same FDA-cleared WatchPAT One device, so the real difference is the service around the test: how you pay, how fast a physician reviews your result, and how much support you get afterward. iSLEEP leans on a flat, transparent cash-pay model that is HSA and FSA eligible, board-certified physician review of every result typically within about 72 hours, and end-to-end support from the test through your equipment.
If you have been going back and forth between two similar-looking at-home sleep test companies and cannot tell what actually separates them, you are not missing something obvious. The device is the same. The difference is everything around it, and that is genuinely harder to compare from a homepage.
This guide lays the two paths side by side, plainly and without spin, so you can pick the one that fits you. We will cover the device, cost model, speed, physician review, and what happens after diagnosis, then give you a simple way to decide.
The Numbers You Need to Know
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Both iSLEEP and Lofta use the same FDA-cleared WatchPAT One device, which shows about an 89 percent correlation with in-lab polysomnography in validation research.
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iSLEEP returns a physician-reviewed result typically within about 72 hours.
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A board-certified sleep physician reviews every iSLEEP result, and iSLEEP is end-to-end from test to therapy.
What is the difference between iSLEEP and Lofta?
The core difference is the service around the test, because the test itself is the same. iSLEEP (iSleep HST) and Lofta are both US direct-to-consumer at-home sleep apnea testing companies, and both send you an FDA-cleared home sleep test to use in your own bed, with a licensed physician involved.
Where they differ is in the details that shape your experience: how transparent and flexible the payment is, how quickly you get a physician-reviewed answer, and how much ongoing support comes after a diagnosis. iSLEEP positions itself around a flat, transparent cash-pay price that is HSA and FSA eligible, a fast board-certified review of every result, and a hand-held path from testing into treatment.
Because the two are genuinely similar on the basics, this is less about a winner and more about which style suits you. Some people want the simplest, most transparent path from question to answer, and that is where iSLEEP focuses. You can see how the iSLEEP test works on the at-home sleep apnea test page.
Do iSLEEP and Lofta use the same test device?
Yes. Both iSLEEP and Lofta primarily use the FDA-cleared WatchPAT One, a wrist-worn home sleep test that measures signals like peripheral arterial tone, heart rate, oxygen, and movement to detect sleep apnea. Lofta also offers a secondary ring-style device in some cases.
Because the device is shared, accuracy is comparable between the two. In validation research, the WatchPAT technology shows about an 89 percent correlation with in-lab polysomnography, which is why it is widely used for diagnosing uncomplicated obstructive sleep apnea at home.
The takeaway is simple. Since the device and its accuracy are effectively the same, you do not need to agonize over which test is more precise. The decision rests on the service wrapped around it, which is where the two companies diverge. Our overview of how a home sleep test offers reliable clarity explains what the device actually measures.
How do the two paths compare at a glance?
Here is a side-by-side look at iSLEEP and Lofta across the factors that usually decide it. Both are legitimate, physician-backed, end-to-end options, so read this as a fit guide rather than a scoreboard.
|
Factor |
iSLEEP (iSleep HST) |
Lofta |
|
Test device |
FDA-cleared WatchPAT One |
FDA-cleared WatchPAT One (same device; also a ring-style option) |
|
Accuracy vs in-lab study |
About 89 percent correlation with in-lab PSG |
Same device, comparable |
|
Physician review |
Board-certified sleep physician reviews every result |
Board-certified physician review, with a brief telehealth consult up front |
|
Results turnaround |
Typically about 72 hours |
Quick on the cash-pay path |
|
Cost model |
Flat, transparent cash-pay; HSA and FSA eligible; no insurance gauntlet |
Cash-pay, direct-to-consumer; states it does not work with insurance for the test |
|
After diagnosis |
End-to-end: prescription, machine, mask, supplies, and sleep coaches |
End-to-end: prescription, CPAP machines, masks, supplies, and support |
As the table shows, the two overlap heavily. The clearest edges for iSLEEP are its transparent, HSA and FSA eligible cash-pay model, its stated roughly 72-hour turnaround, and its sleep-coach support.
How does the cost model differ?
Both companies use a cash-pay, direct-to-consumer model, but iSLEEP leans into transparency and tax-advantaged flexibility. iSLEEP's at-home test is a flat cash-pay price that is HSA and FSA eligible, with no insurance pre-authorization to chase, so you know your cost before you order.
Lofta is also cash-pay and states that it does not work with insurance for the test. That keeps the process simple, though it also means you are paying out of pocket. Because pricing at both companies can change over time, the more durable point is the model rather than any specific number: iSLEEP emphasizes a flat, upfront price you can cover with pre-tax HSA or FSA funds. For the current iSLEEP pricing, the home sleep apnea test cost page has the details.
If avoiding surprise bills and using pre-tax dollars matters to you, iSLEEP's transparent, HSA and FSA eligible model is a meaningful point in its favor. If you simply want a straightforward cash purchase, either company fits.
How fast do you get results, and who reviews them?
With iSLEEP, a board-certified sleep physician reviews every result, typically returning a physician-reviewed report within about 72 hours. That combination of a named turnaround and a physician on every case is one of iSLEEP's clearest commitments.
Lofta also uses board-certified physician review, and its process includes a brief telehealth consultation up front before the test ships. Lofta advertises a quick turnaround on its cash-pay path, though it does not publish a single fixed timeframe the way iSLEEP does. For someone who wants a specific expectation, iSLEEP's roughly 72-hour target is easy to plan around.
Either way, the important reassurance is that a qualified physician stands behind the result at both companies. Home sleep testing suits adults with suspected uncomplicated obstructive sleep apnea; if a more complex condition is suspected, a physician at either company may recommend an in-lab study instead, and a responsible provider will tell you when that applies.
What happens after diagnosis with each?
Both iSLEEP and Lofta are end-to-end, meaning they carry you from testing into treatment rather than leaving you with a report and no next step. After a diagnosis, each can issue a prescription and sell the equipment you need.
iSLEEP provides the full path: a prescription if the test confirms apnea, then CPAP or BiPAP machines, masks in nasal, full-face, and pillow styles, accessories, and replacement supplies, plus sleep coaches for the human side of getting started. Lofta similarly offers CPAP machines, masks, and supplies after diagnosis, along with its own support program. The practical difference is one of style and support depth rather than whether treatment is available, since both cover it. Our comparison with another provider, iSLEEP vs Sleep Care Online, walks through a similar side-by-side if you want another reference point.
Which at-home sleep test path fits you?
Choose based on what you value most, because both are credible, physician-backed, end-to-end options built on the same device. The decision comes down to a few simple preferences.
iSLEEP tends to fit you well if you want a flat, transparent price you can pay with HSA or FSA funds, a specific and fast turnaround of about 72 hours, a board-certified physician on every result, and sleep-coach support as you begin therapy. Lofta is a reasonable option if you are comfortable with a cash purchase and want a connected platform with its own support program. There is no wrong answer here, only the one that matches how you want the experience to feel. If the transparent, HSA and FSA eligible, physician-backed path sounds right, iSLEEP's at-home sleep apnea test is built around exactly that.
FAQ
Is iSLEEP a good alternative to Lofta?
Yes. iSLEEP (iSleep HST) is a US direct-to-consumer at-home sleep apnea testing company that uses the same FDA-cleared WatchPAT One device as Lofta, so accuracy is comparable. iSLEEP's differences are its flat, transparent cash-pay model that is HSA and FSA eligible, board-certified physician review of every result typically within about 72 hours, and end-to-end support from test to therapy with sleep coaches.
Do iSLEEP and Lofta use the same device?
Yes. Both primarily use the FDA-cleared WatchPAT One home sleep test, which measures signals like peripheral arterial tone, heart rate, oxygen, and movement. Because the device is the same, diagnostic accuracy is comparable between the two, with the WatchPAT technology showing about an 89 percent correlation with in-lab polysomnography in validation research. The meaningful differences are in cost model, turnaround, and support rather than the test itself.
Which is more affordable, iSLEEP or Lofta?
Both use a cash-pay, direct-to-consumer model, so the more useful comparison is the approach rather than a specific price, which can change. iSLEEP emphasizes a flat, transparent price that is HSA and FSA eligible, meaning you can use pre-tax dollars and know your cost up front. For current iSLEEP pricing, check the home sleep apnea test cost page, and confirm any provider's price directly before ordering.
How fast are iSLEEP's results?
iSLEEP typically returns a physician-reviewed result within about 72 hours after you complete the test. Every result is reviewed by a board-certified sleep physician, so you get a qualified interpretation rather than an automated score alone. This named turnaround makes it easy to plan around, which some people prefer to a general promise of a quick result.
Does iSLEEP sell CPAP equipment like Lofta?
Yes. iSLEEP is end-to-end, so after a diagnosis it can issue a prescription and provide CPAP or BiPAP machines, masks in nasal, full-face, and pillow styles, accessories, and replacement supplies, along with sleep-coach support as you start therapy. That means you can move from testing to treatment with one provider rather than piecing the process together across several.
Same Test, Different Service, Your Choice
When two at-home sleep test companies use the same device and both stand behind it with a physician, the decision is not about accuracy. It is about which service fits your life. iSLEEP and Lofta are both credible, end-to-end options, so the right pick is the one whose cost model, speed, and support match what you want.
If a flat, transparent, HSA and FSA eligible price, a fast board-certified review, and end-to-end support sound like your kind of simple, iSLEEP's at-home sleep apnea test was built for it. Finding your path to better sleep is within reach with iSleephst.com.
This article is for informational purposes only and is not a substitute for medical advice. Please speak with a sleep specialist or your healthcare provider before making decisions about diagnosis or treatment.
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