The FemmeFunn Booster Bullet is one of my strongest bullet vibrators and has a good range between low and high. 

I don’t consider many bullet vibrators’ top strength “extreme,” but the Booster Bullet is one I do. 

It reaches a 9.5 out of 10 on its top power level. I never need to use this setting because even the second level is intense. The Booster Bullet has about 5% more power than the cheaper FemmeFunn Ultra Bullet – though the Ultra’s 9 out of 10 top power is strong enough for most people. Depending on your budget, it might be worth saving the $20 going with the Ultra Bullet for the minimal difference.

There are better choices than the FemmeFunn Booster Bullet for those who need mild stimulation. Its lowest power is 4.75 out of 10 strength – it begins with a fair amount of power. If you need more gentle settings consider the Lovense Ambi or BMS Swan Maximum if you like buzzy vibrations. Or the We-Vibe Tango X if you prefer rumbly vibrations.

As someone who enjoys moderate to intense vibrations but nothing too extreme, I find the Booster Bullet’s starting level perfect as a warm-up. I spend a lot of time with it because you can vary how intense it feels by applying more or less pressure. Or by changing how direct the stimulation is on your clit.

Then, when I switch to the second power level, I’m ready for its strength and don’t find it overwhelming. This setting is around my ideal strength to finish.

The Lovense Ambi has an outstanding power range. It begins gently, climbs through moderately powerful middle levels, and reaches an intense top setting.

The Ambi’s top strength of 8.0 out of 10 is plenty for me. It has comparable power to my favorite mid-sized vibrators like the Lelo Mona 2 or Lovense Hyphy. Often, I orgasm on one of the upper-middle levels, never reaching the top setting, as I enjoy moderate strength.

The Ambi’s lowest power setting is a 1.5 out of 10 vibration strength, which is very soft. The Lovense Ambi’s wide power range is great for anyone who needs milder settings while warming up to avoid overstimulation.

There is a quirk to be aware of: in order to access the Lovense Ambi’s full power range, you’ll need to use the Lovense app. Using the app, you can gradually adjust the power in tiny increments from its low power of 1.5 to its top strength of 8.0. This is great for anyone who finds large steps distracting.

However, just 3 preset power levels are accessible using the button on the Lovense Ambi’s base. But you can set the 3 levels to whatever strength you want. Just navigate to the “Adjust Levels” screen in the Lovense app and set each setting to your preferred intensity.

I love the default preset levels and haven’t changed mine out, but you can if you want to!

We rate rumbly vibrators higher than buzzy ones because it’s what most people prefer. But others prefer buzzy vibrators, so go with what you like! 

The FemmeFunn Booster Bullet is buzzy. Only the lowest power level is in the rumbly range. The two highest settings are moderately and extremely buzzy. This buzziness makes the already powerful vibrations feel even more intense.

I personally enjoy the Booster Bullet’s buzzy vibrations – it’s one of my favorites. But those who want deep, rumbly vibrations will want to go with the We-Vibe Tango X instead. It’s the most rumbly bullet I’ve tried. Although not quite as strong as the Booster Bullet, it will be enough strength for many people. 

Vibrations typically become buzzier the stronger they get. None of the bullets I’ve tested that have extreme strength like the FemmeFunn Booster Bullet are rumbly. So consider whether you value rumbliness or intensity more.

We rate rumbly vibrations higher than buzzy ones because it’s what most people prefer.

The Lovense Ambi has a pretty good amount of rumbliness. The first half of the power range feels rumbly. Then, the stronger half of the power levels feel neutral or moderately buzzy.

If you love rumbly vibrations, you’ll have some settings to enjoy on the low to mid-powered end, but nothing strong and rumbly. If you want comparable power with deeper vibrations, consider the We-Vibe Tango X.

But I actually love the feeling of neutral or somewhat buzzy vibrations in a bullet vibrator. When vibrations have enormous power, like large wand vibrators do, buzziness makes them feel overwhelming. That’s why I prefer rumbly wands like the Magic Wand Rechargeable over buzzy ones like the Doxy Die Cast 3.

But the intensity of small bullet vibrators is moderate in comparison. Some buzziness in a bullet vibrator adds a kick at the surface that helps me orgasm more easily. As a result, the Lovense Ambi is one of my favorite bullet vibrators. It has plenty of settings toward the center of the spectrum, from moderately rumbly to moderately buzzy, that I really enjoy.

The FemmeFunn Booster Bullet is neither broad nor particularly focused – it’s a happy medium. The relatively wide tip (nearly an inch) is broader than many bullets with a typical lipstick or tapered shape. And it’s rounded, making it feel broader too. This makes it comfortable for firm pressure because it’s more evenly distributing that weight instead of feeling pokey.

But it’s still narrower than several bullets and other mini vibrators like the We-Vibe Touch X. The tip is small enough to isolate vibrations to a reasonably small area, or you can use the side of the bullet to spread that out and cover a bit more space.

The Lovense Ambi is generally slightly broader than most bullet vibrators but still more precise than other vibrators. And its unique shape lets you vary the precision of the stimulation.

The Lovense Ambi’s rounded head is 1.04 inches wide, whereas the famous We-Vibe Tango X is just 0.69 inches wide – much more precise. The Ambi’s slight extra width is great for those who enjoy applying firm pressure because you can hone in on a fairly small area while still spreading the pressure out more comfortably than a narrow bullet vibrator.

The rounded head also has a subtle lip that you can use to make the stimulation more precise. You can use the tip on the back of the toy for very focused stimulation. However, I’ve found that using the back tip positions the Ambi at a more awkward angle. The motor is also closer to the rounded end, so I use that side. If you want even broader stimulation, you can press the long, flat end against your whole vulva, too.

Do what works for you – the unique shape provides much more variation in how you can use the Ambi than most bullet vibrators.

The Lovense Ambi’s app has incredible features for close-range play. I’ve tried many remote and app-controlled vibrators, and Lovense has the best app – it’s the most feature-rich, is the easiest to use, and has the best connectivity (discussed here).

The Lovense app gives you detailed control of the Ambi’s vibrations. Using the “Remote” feature, you can set the Ambi’s power to your precise, preferred strength. Simply raise or lower the on-screen dot to incrementally adjustment the vibration strength.

Press the “Float” button to hold the power at that intensity. Or click “Loop” to easily create a repeating pattern in the moment. You can also create a pattern you enjoy and save it to use again later. We’ve found pattern creation in other apps like We-Vibe to be much clunkier than Lovense’s simple, intuitive implementation.

You can also connect multiple Lovense toys simultaneously and control each toy within the app. The Lovense screen will provide a separate control dot for each connected toy. So if you have a wearable G-spot vibrator like the Lovense Lush 3 or Lovense Vulse, you can control it while using the Ambi on your clit.

You can browse through unlimited patterns that other Lovense users have created and shared in the “Discover” section and save them to your own frequently used library under “My Patterns.” Adjust the speed of each pattern to make it just right for you!

You can also use the Music and Sound features to control the Ambi’s vibrations using music saved on your phone or sound picked up by your phone’s mic. You used to be able to control the Ambi using Spotify, but Spotify discontinued support for third-party apps in 2022.

You can also adjust how sensitive the Ambi is to the music or sound so that the noise must be louder for the Ambi to vibrate.

You can also set an alarm so your Ambi vibrates at a certain time. However, this feature is more useful for Lovense’s wearable vibrators like the Lovense Lush 3 or Lovense Ferri. It’s unlikely you’ll wake up holding the Lovense Ambi in just the right spot!

The Lovense app’s long-distance features (and connectivity discussed below) are also the best of any long-distance vibrator.

Using the Lovense app, a long-distance partner can control your Ambi from anywhere in the world. They’ll use the same “Remote” screen that you have when controlling the Ambi nearby using Bluetooth. The functionality is not reduced for long-distance play like it is with Satisfyer’s app (which is used to control the Satisfyer Ultra Power Bullet 8).

Your long-distance partner can set the exact vibration strength they want using the “Float” feature, and they can quickly and easily create a pattern for you to enjoy using the “Loop” function. They can also send you predesigned patterns they’ve created or other Lovense users have shared.

You can video chat or message with your long-distance partner within the Lovense app while they control your Ambi. You don’t need to use a separate messaging or video chat app. You can minimize the control panel to see your partner more clearly in the video feed.

Or, if you feel more comfortable without video, you can turn off your video feed and mic at any time. Or simply share control of your toy without a voice or video call.

You can also share control of the Lovense Ambi’s vibrations without allowing video or sound in the first place. This feature is especially useful for those who want to give control to an anonymous long-distance partner. You can generate a one-time control link for a set amount of time and anonymously send it.

Once time is up, that person cannot request control of your Lovense Ambi again unless you send them another link.

For a partner you’ll play with repeatedly, simply save their username to your saved partners list. You can also save multiple partners. If your partner also has a Lovense toy, you can simultaneously control each other’s toy.

Lovense also offers several partner settings unique to its app. For instance, you can allow a particular partner to control your Ambi without requiring them to request permission first, which helps you connect more quickly.

The Lovense app easily provides the most intuitive and feature-rich long-distance experience!

The Lovense Ambi’s connectivity with the app is extremely reliable. Lovense has the best connectivity – during both nearby Bluetooth control and long-distance control.

Connecting the Ambi to the Lovense app is quick and easy. The first time you connect, you’ll need to add the Lovense Ambi to your list of toys, which takes less than 20 seconds. Once you’ve added the Ambi, it typically connects immediately and automatically when you open the Lovense app.

Once connected, it rarely disconnects. I regularly play without any disconnections, even if I lock my screen or use other apps for extended periods.

If it loses connection, the Lovense Ambi usually re-pairs automatically, so it’s not very disruptive. Lovense is the best app-controlled brand for a smooth experience.

It also holds its close-range Bluetooth connection from a good distance (155 feet in our test). My partner and I tested the Bluetooth distance in the alley behind our house. I had my partner connect his phone to the Ambi and walk down the alley, continually changing my Ambi’s vibrations as he walked away. When the connection dropped we measured the distance (155 feet).

The Lovense Ambi also remains reliably connected during long-distance play as long as you and your partner have good Wi-Fi or a strong cell signal. Lovense’s long-distance features are not glitchy like We-Vibe’s often are.

This is how the long-distance connection works: the partner with the Ambi connects the vibrator to their phone using the typical Bluetooth connection – the same way you connect for nearby play. Since the Lovense Ambi’s Blutooth connection is excellent, this part of the long-distance connection is excellent too.

Then, your long-distance partner’s phone communicates with your phone over Wi-Fi or cell data to control the Ambi from afar—just like you and I are communicating long-distance over the internet right now. So, as long as you both have good Wi-Fi or cell signal, the connection is great.

For reference, my partner and I rarely, if ever, have an issue connecting long-distance in Lovense’s app. You don’t need outstanding internet – good is good enough!

The FemmeFunn Booster Bullet is very comfortable, and the buttons provide good control.

The length is excellent for maneuvering without taking up too much space or cramping your fingers. The form is flexible, which makes it comfortable to press against your body. This flexibility means you need to shift your fingers and use them to press closer to the tip if you want extra-firm pressure rather than leveraging it from the base as you would with a rigid bullet.

The vibrations travel into your fingers a bit when using them to press near the tip (where the motor is located) for extra pressure, but it’s nothing too distracting.

You cycle through the 3 intensity levels and 17 patterns using a single button on the bullet’s base. This is less convenient than bullets that let you toggle forward and backward with separate buttons, like the We-Vibe Tango X. Still, the Booster Bullet is more advanced than other cycling bullets because of the Boost button and memory system.

The Boost button lets you quickly jump from wherever you are in the cycle to the top steady intensity level. So basically, whenever you’re on the edge, tap the Boost button to take you the rest of the way. In addition to the slight power increase, the Boost button is this bullet’s other upgrade over the FemmeFunn Ultra Bullet. If it doesn’t seem worthwhile to you, you can save some money and get the Ultra.

The Booster Bullet also has a built-in memory system (as does the Ultra Bullet). The next time you use the bullet, it will pick up at your most recent setting. That way, if you have a favorite setting, you won’t need to cycle through all the patterns to find it again. 

And for those who prefer warming up on the gentlest setting, the next click of the button will take you directly to the lowest constant power level.

The Lovense Ambi is a very comfortable and easy-to-use bullet vibrator.

When I use vibrators, I press them firmly into my body. Because the Lovense Ambi has an angled head, leveraging it and applying pressure is much easier than it is with most bullet vibrators. This unique shape can be a little more awkward to hold than a straight bullet, but it helps leverage the Ambi to maintain good clitoral contact without taking up much space. And it’s still comfortable – it just takes some getting used to.

Like most bullet vibrators, the motor is close to your hand because the toy is so small. So some vibrations travel into your hand, but the silicone handle helps dampen them. They’re minimal, so I don’t find them distracting.

You can control the Lovense Ambi using the button on the base of the handle or through the Lovense app. The physical controls are just okay. It’s a single button, so you have to cycle through the 3 programmed intensity levels (which you can set in the app) and the 4 vibration patterns.

I don’t find it annoying since there are not too many settings. But if you frequently change power levels or patterns, you’ll want to control the Ambi using the app. You can access the Lovense Ambi’s full power range in the app and quickly move between settings and patterns.

This bullet works amazingly well during sex. It’s a great size to slip into tight spaces without taking up much room or bumping against your partner. Its round tip and flexible form make it especially comfortable, even with heavy movement during sex. It flexes with your body to remain in comfortable contact with your clit (directly or indirectly). 

It’s also a reasonably long bullet, so I don’t need to keep my hands too far down during sex.

The Lovense Ambi is excellent during sex.

The angled head helps the Ambi slip easily between your legs without the base of the handle sticking out too far. This way, your hand doesn’t interfere with your partner’s body. You’re more limited when trying to angle and leverage a straight bullet vibrator during sex.

The rounded head distributes the pressure very comfortably. And its moderate width makes it easier to keep it in contact with my clit during sex than narrow bullet vibrators. The only reason I didn’t rate the Ambi a perfect 10.0 is that the handle is shorter than some. So, it can become tiring to hold after a while if you’re pressing hard.

But overall, it’s one of my favorites to use during sex.

The FemmeFunn Booster Bullet has good, quiet noise levels. Our decibel readings were lower than the average bullet – this is especially impressive considering it’s one of the most powerful I’ve tested.

We also test whether someone would hear the bullet on the other side of a closed door. My partner stands directly on the other side of the door while I use the bullet in the bedroom.

The first two power levels were completely inaudible, but my partner could just barely hear it on the highest setting. This is the note he left in our testing spreadsheet word for word:

“This was just barely perceptible on high. I had to try really hard and wait for sounds outside to become extremely quiet. I doubt anyone would actually hear in typical use.”

Turning on a box fan or music solves this problem completely, so you can use this to mask the noise if you want to use all power levels.

The Lovense Ambi is very quiet. I can use every power setting, and my partner cannot hear it from the other side of the bedroom door. It’s definitely discreet enough if you share a wall with a housemate.

The buzzing sound itself is also mild and not distracting if you’re easily taken out of the mood by sound.

The FemmeFunn Booster Bullet is rechargeable and lasted 85 minutes on high power during our testing. It has the longest battery life of my “extremely powerful” bullets. And if you also use the lower or middle powers occasionally, you’ll prolong the lifespan even more.

The Lovense Ambi is rechargeable and has an acceptable battery life. I charge all my vibrators fully, then run them on their highest setting until they die. The Lovense Ambi lasted 55 minutes.

This is below the average bullet vibrator’s battery life. But since I typically don’t go up to the top strength, I can make the Lovense Ambi last longer. 55 minutes is still plenty for most people, but you’ll want to charge it between uses.

I’d recommend the We-Vibe Tango X if you want something about this strong that lasts longer.

The FemmeFunn Booster Bullet has excellent build quality. The body-safe silicone is smooth and comfortable. The ABS Plastic housing the motor also feels solid. It has some good weight, making it feel more durable than cheap, lightweight bullets. The silicone buttons also feel well-made. 

The flexible part is a little squeaky, which is not as luxurious as I would hope, but it hasn’t caused me any issues. I’m comfortable applying firm pressure without worrying about damaging the bullet.

The Lovense Ambi has fantastic build quality. There are no seams, and it’s completely covered in smooth, body-safe silicone. It’s not flimsy, and the button is easy to press and feels high-quality.

Since the Booster Bullet is entirely waterproof, it’s very easy to clean. You can completely submerge it while scrubbing it with soap and water. No worrying about damaging the toy.

The Lovense Ambi is very easy to clean because it’s completely IPX7 waterproof. You can fully submerge this while scrubbing with soap and water.