Eufy S1 Pro vs Momcozy M5
If you’re shopping for a hands-free breast pump that’s powerful, portable, and packed with features, the Eufy S1 Pro and Momcozy M5 are two standout options worth considering.
Both pumps are sleek, all-in-one wearable designs that give you the freedom to pump discreetly while working, chasing toddlers, or just getting things done. But while they may look similar at first glance, they take very different approaches when it comes to suction strength, comfort, app features, and battery life.
So which pump is better for your lifestyle?
In this Eufy S1 Pro vs Momcozy M5 comparison, I break down all the key differences—design, flange fit, suction performance, battery, and more—so you can confidently choose the right wearable breast pump for your needs.
Prefer to watch? Scroll down for the full video review. Or keep reading for the complete written comparison.
Editor’s note: Pumping Milk is reader-supported, which means I may earn a small commission, at no cost to you, if you make a purchase through one of my links. Learn more.
Similarities and Differences
At first glance, the Eufy S1 Pro and Momcozy M5 both offer a sleek, all-in-one wearable pumping experience designed for comfort and convenience. They’re lightweight, discreet under clothing, and designed for hands-free pumping without any external tubes or cords.
But once you dig a little deeper, the differences become much more apparent.
The Eufy S1 Pro leans into premium features with advanced app controls, built-in heat flow technology, and a rechargeable carry case that keeps your pump powered for up to 5 days. It’s ideal for moms looking for a high-tech, fully customizable experience.
* Excludes accessories and new releases
The Momcozy M5, on the other hand, is a fantastic value-packed option. It skips the app but adds unique perks like a third pumping mode (mixed) with micro-vibration, a DoubleFit™ flange for better suction comfort, and a lightweight design that still delivers hospital-grade performance—all at a more affordable price point.
So while both pumps aim to simplify your pumping routine, they cater to slightly different needs. Whether you’re after premium tech or practical simplicity, one of these wearables is likely the better fit for your lifestyle.
Quick Comparison: Eufy S1 Pro vs Momcozy M5
| Feature | Eufy S1 Pro | Momcozy M5 |
|---|---|---|
| Suction Strength | Up to 300mmHg | Up to 300mmHg |
| Pumping Modes | 2 modes on pump, 4 in app | 3 modes (stimulation, expression, mix) |
| App Integration | Yes – Eufy Baby app | No |
| Heating Feature | Yes – 7 heat levels (35°C–41°C) | No – uses micro-vibration instead |
| Battery Life | Up to 5 days w/ charging case | 120 minutes per pump |
| Charging Type | Magnetic USB + rechargeable case | USB-C |
| Flange Angle | 105° | 105° |
| Flange Design | Soft-touch velvet silicone | Soft silicone w/ DoubleFit™ seal |
| Flange Sizes | 24mm + 17, 19, 21mm inserts | 24mm + 17, 19, 21mm inserts |
| Collection Capacity | 5 oz (teardrop shape) | 5.4 oz (semi-circular) |
| Noise Level | 46 dB | 48 dB |
| App Customization | Full control: suction, rhythm, timer | N/A |
| Sterilization Safe | Steam sterilizer safe | Hand wash only |
| Included Carry Case | Slim rechargeable case | Large hard-shell case (non-charging) |
| Price Range | Premium | More affordable |
Pump Design
When it comes to pump design comparison, both the Eufy S1 Pro breast pump and Momcozy M5 are closed-system, all-in-one wearable breast pumps—so there are no tubes, cords, or external motors to worry about. Just tuck them into your bra and pump hands-free.
When it comes to the shape and fit of the pumps themselves, though, there are some noticeable differences.
The Eufy S1 Pro has a sleek teardrop shape that sits close to the body and offers a low-profile fit, making it feel discreet and less bulky under your bra. Its smooth, minimalist exterior adds to its premium feel, and I personally love how well it contours to the breast for a more natural, comfortable wear. The pump also comes with a 5 oz collection container, which complements the teardrop design and sits neatly beneath the flange.
The Momcozy M5, on the other hand, features a semi-circular design with a slightly wider profile. While it’s still quite compact and very lightweight at 230g per pump (versus Eufy’s 280g), it can feel a bit more prominent inside your bra. That said, the soft silicone cup used in the M5 adds a layer of flexibility that many moms may find more forgiving and comfortable, especially during longer pumping sessions. It also features a 5.4 oz milk container, offering a slightly larger capacity than the Eufy—ideal for longer or fuller pumping sessions.
So while both pumps are highly wearable, the Eufy S1 Pro leans more minimalist and discreet, while the Momcozy M5 focuses on flexibility, softness, and just a little extra room for milk collection.
Suction and Pumping Modes
Both the Momcozy M5 and Eufy wearable pump offer hospital-grade suction strength up to 300mmHg, making them strong contenders in the world of wearable pumps. But how that suction is delivered—and supported—differs significantly between the two.
The Eufy S1 Pro includes two core modes—stimulation and expression—on the pump itself. But the real game-changer is the Eufy Baby app, where you can access four fully customizable modes, control your suction rhythm, adjust your session timer, and activate one of its most unique features: built-in heat flow technology.
With seven adjustable heat levels ranging from 35°C to 41°C, the Eufy uses gentle warmth around the flange to help stimulate letdown, improve milk flow, and reduce clogged ducts. I think the heating function is especially helpful for those early morning pumps when letdown can feel a little sluggish or for days when you’re feeling extra tender or engorged. It’s a luxury feature, but also one that delivers real, practical benefits—especially if you struggle with slow flow or discomfort during pumping.
The Momcozy M5, by contrast, skips the app completely and focuses on built-in simplicity. It features three pumping modes: stimulation, expression, and a unique mixed mode that includes micro-vibrations. These gentle pulses are designed to stimulate the milk ducts and boost output—something I’ve found to be incredibly helpful for loosening blockages or speeding up slow sessions. With nine suction levels (compared to Eufy’s seven), the M5 also gives you more fine-tuned control right from the pump itself—no phone needed.
So, while both pumps deliver powerful suction and effective milk removal, the Eufy S1 Pro excels in customization and advanced comfort features like heat, while the Momcozy M5 stands out for its simple, user-friendly design with built-in vibration for added flow support.
And if you are chasing app integration specifically, I recommend checking out how the Eufy S1 Pro compares to the Momcozy M9 in this Eufy S1 Pro vs Momcozy M9 breakdown.
Flange Design
Both the Eufy S1 Pro breast pump and Momcozy M5 breast pump offer thoughtful flange designs, but they take very different approaches when it comes to materials, fit, and feel.
The Eufy S1 Pro features a 105° flange angle, which is designed to mimic the natural latch of a baby. This wider angle helps reduce compression on the milk ducts and promotes a more comfortable, efficient milk flow. While the material is still soft and silicone-based, it has a velvety outer finish that feels smooth to the touch yet slightly firmer than traditional silicone. I find this adds a sense of durability and structure, which may appeal to moms who prefer a more secure, stable feel during pumping.
The Momcozy M5 also uses a 105° flange angle, which is a standout upgrade from the standard 90° angles you’ll find on many other pumps. But what really sets the M5 apart is the DoubleFit™ flange seal—a soft, flexible inner layer that hugs the breast more closely to help prevent air leaks and improve suction. It’s made entirely of ultra-soft silicone, which makes it very gentle on the skin and ideal for moms who are sensitive or prone to discomfort.
Both pumps come with a 24mm flange size and include smaller inserts (17mm, 19mm, and 21mm) to help you get the right fit. But if you prefer a firmer feel, the Eufy may suit you better. If you’re after a more cushion-like pumping experience, the Momcozy M5’s soft silicone and double-seal design are hard to beat.
Battery Life and Charging
When it comes to wearable breast pumps, battery life is a big deal—especially if you’re pumping multiple times a day or need a reliable option while on the go. And this is one area where the Momcozy M5 vs Eufy S1 Pro go in very different directions.
The Eufy S1 Pro takes battery convenience to the next level with its rechargeable charging case. Once fully charged, the case can recharge the pump multiple times, giving you up to 5 days of use depending on how often and how long you pump. This setup is a total game changer for travel, workdays, or any time you’re away from a power outlet. Just pop your pumps back in the case between sessions, and they’ll be ready to go—no cords, no reminders, no stress. The pump itself charges via a magnetic USB cable, which also makes plugging in quick and easy when you do need a top-up.
The Momcozy M5, on the other hand, is a more traditional setup. Each pump charges via USB-C, which is convenient and widely compatible. The M5 offers up to 120 minutes of battery life per full charge, which is generally enough for 3–4 sessions, depending on your suction level and session length. While you will need to plug it in daily if you’re pumping frequently, the charging process is still quick and easy—and works well for most routines.
So, if you’re looking for maximum flexibility and multi-day power, the Eufy S1 Pro’s charging case gives it a serious edge. But if you’re okay with a quick plug-in between sessions, the Momcozy M5 still delivers reliable performance in a more budget-friendly package.
Cleaning & Sterilization
The Eufy S1 Pro parts are steam sterilizer safe, which is a big plus if you want a faster, more hygienic cleaning option without hand scrubbing every part.
The Momcozy M5, however, requires hand washing only and is not safe for steam or UV sterilization. While still easy to clean with just five parts, it does mean a bit more hands-on time after each session.
So if quick and convenient sterilization is a priority, the Eufy has a clear advantage here.
Noise Levels
Both pumps are impressively quiet—ideal for discreet pumping.
The Eufy S1 Pro operates at around 46 dB, while the Momcozy M5 is just slightly louder at 48 dB.
In real-world use, both are low-noise enough for pumping at work, during the night, or around a sleeping baby.
Price and Value
The Momcozy M5 is priced more affordably and still delivers an impressive feature set, including hospital-grade suction, nine intensity levels, and a unique mixed mode with micro-vibrations—all without needing an app.
The Eufy S1 Pro comes at a higher price point, but it brings luxury features like built-in heat flow technology, app-controlled customization, and an innovative rechargeable carry case that extends battery life for days—ideal for moms looking for a high-tech, premium experience.
Both pumps offer great value—just in different ways.
The Verdict
So, which is better Eufy S1 Pro or Momcozy M5? For me, choosing between the Eufy breast pump and Momcozy M5 really comes down to how you plan to use your wearable pump—and what features matter most to you.
If you’re after a high-tech, feature-rich experience with maximum customization, built-in heat, and a long-lasting rechargeable carry case, then the Eufy S1 Pro is absolutely worth the investment. It’s ideal for daily, frequent use and for moms who want total control over comfort and flow.
But if you’re looking for a reliable, affordable, and easy-to-use wearable pump without needing an app, the Momcozy M5 is a popular choice. Its micro-vibration mode, soft silicone design, and strong suction make it a standout in its price range—especially for part-time or on-the-go pumping.
Whichever pump you choose, you’re getting a hands-free solution that offers convenience, comfort, and performance.
Think either the Momcozy M5 or Eufy breast pump is the right pump for you?
Use the code: PUMPINGMILK at the Momcozy checkout to get 15% off.
Use the code: pumping10 at the Amazon checkout to get 10% off (M5).
Use the code: PMilkeufy at the Eufy checkout to get 16% off site wide (excludes accessories & new releases)
