# SwitchBot S20 review

Roller mop robot with AI camera and a full service dock

- Our score: 7.0 out of 10
- Price: $800 (checked Oct 31, 2026)
- Status: on sale
- Best for: hard floor homes that want roller mopping on a budget
- Skip if: you want quiet cleaning or have low furniture
- HTML version: https://robotsforthat.com/robot/switchbot-s20/

## Verdict

A good value all in one mopping robot when it is on sale, with a roller mop that testers liked and AI camera obstacle avoidance. It is loud, tall and large, and TechRadar saw docking problems, so it suits open homes more than tight ones. Skip it if you need a mop only mode or quiet runs.

## Pros

- Roller mop cleans itself while it mops
- Good AI obstacle avoidance
- Full dock with hot air drying
- Matter 1.4 with room support in Apple Home
- Often discounted well below list price

## Cons

- Loud, especially when auto emptying
- Docking problems in TechRadar testing
- No mop only mode
- Large robot and dock
- Cleaning solution added by hand

## Specs

- suction: 10,000 Pa with four levels (SwitchBot, Expert Reviews)
- navigation: dToF LiDAR plus AI camera (SwitchBot); Expert Reviews found mapping fast, while TechRadar saw some erratic routes and frequent failed docking
- obstacle avoidance: AI camera, front infrared and side PSD sensors (SwitchBot); TechRadar saw it avoid a cable and a shoe but push a tissue box across the room
- mopping: RevoRoll roller mop with 1 kg of pressure, 300 scrubs per minute and a 4 step rinse while mopping (SwitchBot); no mop only mode (Expert Reviews, HomeKit News)
- self empty: Yes, the station stores dust for up to 90 days (SwitchBot); TechRadar lists a 4 L dock bin
- dock features: Auto empty, auto water refill, mop washing and 50 C hot air drying (SwitchBot); 2.5 L clean and 2.5 L dirty tanks (TechRadar, Expert Reviews), while SwitchBot's launch notice listed 2.7 L clean; an Auto-Fill and Drain version connects to home plumbing
- runtime: Not stated by SwitchBot; 4,000 mAh battery and under 4 hours to charge (SwitchBot)
- height: 115 mm (4.5 in) tall, 365 mm (14.4 in) wide (SwitchBot, TechRadar)
- pet hair: Expert Reviews measured 5 of 5 g pet hair on hard floor and 3.8 of 5 g on carpet
- app: SwitchBot app, Alexa, Google Assistant and Matter 1.4; HomeKit News found rooms show in Apple Home, but the SwitchBot app is still needed for setup and maps
- threshold: Crosses obstacles up to 20 mm (SwitchBot)
- noise: Expert Reviews measured 65 dBA at 1 m; TechRadar called it louder than average in every mode with a very loud auto empty

## Safety

- recalls: No recall found as of 2026-10-30 (CPSC recall API search on saferproducts.gov by brand name returned no SwitchBot recall)
- fcc: Not checked
- company status: Active
- warranty: 1 year (SwitchBot store)

## Questions buyers ask

### Can it connect to my plumbing?

Yes, if you buy the S20 with Auto-Fill and Drain System, which includes a water supply and drainage kit. The standard S20 uses clean and dirty water tanks.

### Does it work with Apple Home?

Yes. It supports Matter 1.4, and HomeKit News found that rooms from the SwitchBot app show up in Apple Home. You still need the SwitchBot app for setup and maps.

### Can it mop without vacuuming?

No. Expert Reviews and HomeKit News both note there is no mop only mode.

### How often do I empty the dock?

SwitchBot says the station stores dust for up to 90 days.

## Sources

1. [SwitchBot store: S20](https://www.switch-bot.com/products/switchbot-floor-cleaning-robot-s20)
2. [SwitchBot store: S20 with Auto-Fill and Drain System](https://www.switch-bot.com/products/switchbot-s20-with-auto-fill-drain-system)
3. [SwitchBot US store: S20 special offer](https://us.switch-bot.com/products/special-offer-switchbot-s20)
4. [TechRadar: SwitchBot S20 review](https://www.techradar.com/home/robot-vacuums/switchbot-s20-review)
5. [Expert Reviews: SwitchBot S20 review](https://www.expertreviews.co.uk/home-garden/vacuums-cleaning/switchbot-s20-robot-vacuum-review)
6. [HomeKit News: SwitchBot S20 review](https://homekitnews.com/2025/09/28/switchbot-floor-cleaning-robot-s20-w-matter-review/)
7. [Heyupnow: SwitchBot launches S20 and K11+](https://heyupnow.com/blogs/news/switchbot-launches-floor-cleaning-robot-s20-and-robot-vacuum-k11-with-matter-1-4)