Quick Comfort
Quick Comfort is a separate vibration and warmth session: no app, calibration or active contractions are required.
- Vibration
- Gentle heat
- Quick Comfort
- Fully clothed
- Works without the app
HOSFU Gen 4
A sit-on pelvic floor trainer for men and women.
Practise Kegel exercises fully clothed, without insertion. In Professional Mode, actively contract and relax while the HOSFU app shows pressure changes after calibration. For a separate comfort session, use gentle warmth and vibration in Quick Comfort.
$128.00SAVE 15%$151.00
Free worldwide shipping · Taxes included90-day unopened returnsFully clothed
One device. Two ways to use it.
Explore the features that make this generation yours.
Smart Training
App-guided training with real-time feedback.
- App connection
- Real-time feedback
- App + on-device buttons
Professional Mode: setup in order.
Connect the app before sitting down, then select a program and calibrate. Follow the cues to contract, hold and fully relax while watching pressure changes in the app. You perform the exercises yourself.
Prepare the seat and airbag
Use a flat, stable, firm chair. The manual specifies holding the inflation button for 2–3 seconds to fill the airbag before use. Use the trainer through clothing.
Connect before you sit
Hold Power for 2 seconds. With the white breathing light on, enable phone Bluetooth and open HOSFU. Wait for the device’s steady blue light. Keep the narrow end between your thighs and the central airbag under the perineal area. Put your feet flat on the floor. Start with a basic course in the app.
Calibrate, then practise
Inside the selected program, tap Calibrate or Reset and follow its prompts. Keep your position steady. Once complete, follow the squeeze, hold and relax cues. Let go fully between contractions.
Thoughtful design. A closer look inside.
Explore how the parts come together.
HOSFU Gen 4
Comparison sample
About this comparison sample
- Surface
- No anti-slip coating; may shift on soft seating.
- App support
- No app connection or training history.
- Heating
- No heating function.
- Weight
- 190 g, compared with 355 g for HOSFU Gen 4.
- Air cushion
- A thinner air cushion.
- Battery runtime
- Approximately one-fifth of HOSFU Gen 4.
- Charging
- No USB-C. Requires a dedicated cable; slower charging.
Four generations of HOSFU
Frequently Asked Questions
Clear answers for your trainer.
30-day fault replacement
If a fault not caused by misuse or accidental damage occurs within 30 days of signed delivery, HOSFU provides a free replacement. Contact jun@hosfusmart.com with your order and a description of the fault before sending the product back. The 40% standard exchange restocking fee does not apply to an eligible fault replacement. This is separate from the 90-day unopened-return policy and does not limit your mandatory consumer rights.
jun@hosfusmart.comReturns and exchanges policyProduct documentation
Need product documentation for your market? Contact HOSFU with the model and destination country you are considering.
Ask about model documentsCan I use it without the app?
Yes. Quick Comfort provides gentle warmth and vibration without the app or active contractions. Professional Mode requires the HOSFU app and calibration, then you actively contract and relax with pressure feedback. To change modes, switch the device off and on again.
Can men use Gen 4 for pelvic floor training?
Yes. Gen 4 is a sit-on Kegel device for men and women. In Professional Mode, its pressure-based biofeedback shows changes as you actively contract and relax after calibration. It does not measure electrical muscle activity or provide a medical diagnosis.
Shipping, returns and warranty
Free shipping to all countries, with taxes included. Estimated transit time to the United States: 4–10 days after dispatch. Request a return of an unopened, sealed HOSFU product within 90 days of delivery. Contact us before sending anything back. HOSFU pays return shipping; eligible returns have no restocking fee. Exchanges carry a 40% restocking fee based on the product price paid. Refunds are processed within 14 days after receipt and inspection. The 40% exchange fee does not apply to eligible non-user-caused faults within 30 days of signed delivery; HOSFU provides a free replacement.
90-day unopened returnsHow does the app display my training movements?
The central air cushion senses pressure changes and sends them over Bluetooth.
In professional mode, the system records pressure changes as you actively contract, hold and relax, and the app displays graphical feedback. Sitting position and body pressure also affect readings, so calibration and active movement remain important.
HOSFU Gen 4 FAQs: buying, design, connection and everyday use
Buying for your business? Ask about wholesale or sample evaluation.