EXTERNAL. FULLY CLOTHED. SCREEN-FREE.
Get to know
your trainer.
A device can move or vibrate without measuring muscle activity. Understanding that difference is the first step.
Four models.
Clearly compared.
Compare Gen 1, Gen 2, Gen 3 and Gen 4 by contact surface, control method, heat, app support and training feedback.
Gen 1 and Gen 2 work without an app. Gen 3 and Gen 4 add app guidance and real-time training feedback.
Know your model
Compare contact surface, controls, app support and feedback before choosing.
Keep it external
Every model is designed for fully clothed, sit-on use. Do not insert the device.
You do the practice
Device movement and vibration are not a substitute for intentional contraction and relaxation.
This is a setup overview, not a complete operating manual. Follow the final model-specific instructions and qualified guidance before use.
Swipe to compare all four models →
| Feature | Gen 1 | Gen 2 | Gen 3 | Gen 4MOST CAPABLE |
|---|---|---|---|---|
| Contact surface | Plastic | Airbag | Airbag | Airbag |
| Heating | — | — | ||
| Reverse Kegel mode | — | — | ||
| App connection | — | — | ||
| Real-time training feedback | — | — | ||
| Works without the app | — | |||
| Controls | On-device buttons | Remote control | HOSFU app | HOSFU app + on-device buttons |
| Battery life | ★ | ★ | ★ | ★★★ |
All four models are external, fully clothed sit-on trainers for men and women, and all include vibration. Features describe the product, not a guaranteed health outcome.
Need help finding the right muscles?
Neither HOSFU trainer checks your technique. A qualified pelvic floor professional can help.Start with the guide