The Lioness 2.0, made by San Francisco–based Lioness Health (founded by ex-Amazon engineer Liz Klinger and Anna Lee), is the second-generation version of the world's first biofeedback vibrator. It's a dual-stim G-spot–and-clitoral vibrator that pairs to a phone app and uses four onboard sensors — force, accelerometer, gyroscope, and temperature — to map what your body is actually doing during arousal and orgasm. After a session, the app's "Live View" plots your pelvic-floor contractions on a graph so you can literally see what your orgasms look like and compare different positions, settings, or partners over time.

Why It Matters

Smart sex tech that closes the feedback loop between sensation and data is one of the most underdeveloped corners of femtech. The Lioness 2.0 has been shipping since 2020 and remains the only consumer-grade biofeedback vibrator with peer-reviewed clinical validation, which gives it staying power in a category where most "smart" toys are just app-controlled motors. Its continued availability and small-but-loyal academic following make it a benchmark for what the next decade of intelligent intimacy hardware could look like.

The hardware itself is medical-grade silicone, USB-rechargeable, and waterproof to splash level. The shape is a soft S-curve with a flexible external arm; the internal arm is short (about 3 inches insertable), positioned to sit against the urethral sponge where pelvic-floor contractions are easiest to detect. There are over 100 customizable vibration intensities across the two motors, and presets are saved per user account. It's not the loudest or most rumbly vibe in this price range — the trade-off for the sensor stack is that the motors run on the gentler end — but reviewers consistently note the arousal data is the actual headline feature.

What reviewers and users say: 93% of polled users said they had better orgasms and understood their body better; 91% said it improved partnered intimacy. Elite Daily's reviewer praised the eye-opening biofeedback graphs ("you can see exactly when your body is responding"). The device has been validated in peer-reviewed research — the Journal of Sexual Medicine published a 2022 study (Allen et al.) showing the Lioness reliably autodetects pelvic-floor contractions associated with orgasm, with good test-retest reliability. That's a level of clinical grounding almost no consumer vibrator has.

Price and where to buy: $229 direct from lioness.health. Also available on Amazon. Not stocked widely at mainstream retailers — Lioness sells primarily DTC.

Materials and safety: Body of medical-grade silicone, no phthalates, no latex. Charges via included magnetic USB cable. App is iOS and Android.

The bottom line: Buy this if you're the kind of person who would rather know than guess. The Lioness is not the most intense vibrator on this list — if raw power is your priority, get a wand. But if you're working through arousal patterns, recovering libido after birth or medication changes, A/B-testing positions with a partner, or just genuinely curious about what your orgasm "looks like," nothing else on the market does what this does. It's also the only consumer vibrator academic researchers will sometimes recommend for use in actual clinical studies.

Sources

Update — 2026-05-03

Initial entry — guide first created.