Main trade-off
Polaris ERA 820
It does not offer app control or a recurring schedule.
Head-to-head
Polaris ERA 820 vs ERA 842: 842 adds scheduling and assisted retrieval
The short answer
The ERA 820 handles the core clean with fewer controls. The ERA 842 is the better ownership fit when app scheduling and Easy Lift will save real effort.
Before you choose
The reasoning and the trade-offs
The needs that actually separate these two
Polaris ERA 842 Smart has the stronger fit for “I want controls and status in an app” and “I want recurring cleaning on a schedule”.
What this is based on
This compares the current strong and useful fit assignments for the exact products. It does not turn them into one overall score.
Main trade-off
Polaris ERA 842 Smart
It is a corded cleaner with deck-side storage needs.
Polaris ERA 820
- Choose it for
- You do not need an app.
- A single 2.5-hour cycle is fine.
- Main trade-off
- It does not offer app control or a recurring schedule.
Polaris ERA 842 Smart
- Choose it for
- You want iAquaLink scheduling.
- Easy Lift matters.
- Main trade-off
- It is a corded cleaner with deck-side storage needs.
About this comparison
Compare the simple ERA with its smart, easier-to-retrieve sibling.
The practical choice turns on app and retrieval, then on the constraints in your own setup.
Winner by situation
Start with what you need it to do
I want controls and status in an app
For app, Polaris ERA 820 records “No” and Polaris ERA 842 Smart records “iAquaLink”. This changes setup and daily operation more than the product's core physical job.
- Polaris ERA 820
- Depends
- Polaris ERA 842 Smart
- Better fit
I want recurring cleaning on a schedule
Its documented recurring mode spreads cleaning across visits. Check battery, floor-only, debris and maintenance limits before leaving it scheduled.
- Polaris ERA 820
- Depends
- Polaris ERA 842 Smart
- Better fit
Getting the robot out of the water should be easy
For retrieval, Polaris ERA 820 records “Standard” and Polaris ERA 842 Smart records “Easy Lift”. This matters when the product must be lifted, moved, transported or stored after use.
- Polaris ERA 820
- Good
- Polaris ERA 842 Smart
- Better fit
I want to guide it toward a missed spot
Check the supported mode and connection state before relying on remote direction. Some models only respond at the surface.
- Polaris ERA 820
- Depends
- Polaris ERA 842 Smart
- Better fit
My pool is large or close to 50 feet
Both records list “60 ft swivel” for cable. Both records show the same result for “Cable”, so this row does not separate them.
- Polaris ERA 820
- Similar
- Polaris ERA 842 Smart
- Similar
What matters in practice
The differences that matter
The needs that actually separate these two
Polaris ERA 842 Smart has the stronger fit for “I want controls and status in an app” and “I want recurring cleaning on a schedule”.
How we reached this conclusion
This compares the current strong and useful fit assignments for the exact products. It does not turn them into one overall score.
The selected needs do not separate this pair
Both products cover the same 2 of 2 buyer requirements attached to this comparison. The choice moves to “app” and “retrieval”.
How we reached this conclusion
This checks the two products against the same selected needs, then names the first verified differences that remain.
Finding models for “My pool is large or close to 50 feet” and “I want fewer stops to empty the filter”
9 of 27 checked robot pool cleaners cover both “My pool is large or close to 50 feet” and “I want fewer stops to empty the filter”. Both products are in that group.
How we reached this conclusion
The count is reproduced by filtering the current category dataset for products with a strong or useful fit for both needs.
Choice A
Polaris, FERA820
ERA 820
A straightforward corded Polaris with a four-liter top canister, 60-foot cable, caddy and cover.
- Best matched use
- Large in-ground pools that need robust floor and wall cleaning without app controls
Checked facts
- The ERA 820 includes a 60-foot swivel cable.
- It cleans the floor and walls in a 2.5-hour cycle.
- A four-liter canister, caddy and cover are included.
Choice B
Polaris, FERA842
ERA 842 Smart
A connected ERA model with selectable zones, scheduling and Easy Lift retrieval.
- Best matched use
- A 60-foot-cable Polaris setup with app scheduling and easier water removal
Checked facts
- It uses a 60-foot swivel cable and four-liter canister.
- iAquaLink adds scheduling and remote cycle control.
- Easy Lift, a caddy, a cover and front-and-rear brushes are included.
Meaningful differences
What changes the fit
| What changes | Polaris ERA 820 | Polaris ERA 842 Smart | Why it matters |
|---|---|---|---|
| App | No | iAquaLink | This changes setup and daily operation more than the product's core physical job. |
| Retrieval | Standard | Easy Lift | This matters when the product must be lifted, moved, transported or stored after use. |
| Canister | 4 liters | 4 liters | Both records show the same result for “Canister”, so this row does not separate them. |
| Cable | 60 ft swivel | 60 ft swivel | Both records show the same result for “Cable”, so this row does not separate them. |
What you give up
Every choice has a cost
If you choose Polaris ERA 820
- The listed zones stop at floor and walls, not the waterline.
If you choose Polaris ERA 842 Smart
- Polaris describes floor and floor-plus-wall zones rather than a dedicated waterline mode.
What the facts say
What the comparison shows
Useful conclusions from the current robot pool cleaners comparison, followed by the checked facts used to reach them.
Compared set
Only 9 of 27 models checked match every need here: “My pool is large or close to 50 feet” and “I want fewer stops to empty the filter”.
9 matching models from 27 checkedSee the checked facts and calculation notes
Match countThe count uses the current product-to-need assignments for “My pool is large or close to 50 feet” and “I want fewer stops to empty the filter”. A need with no documented match does not count.
| Product | Needs matched | Checked facts | Source records |
|---|---|---|---|
| Polaris ERA 820 |
|
| |
| Polaris ERA 842 Smart |
|
|
Ready to choose?
Check the price. Read the owner reviews.
Open either model on Amazon to check the current price, customer reviews and delivery options.
Polaris ERA 820
You do not need an app.
See price & reviews on AmazonPolaris ERA 842 Smart
You want iAquaLink scheduling.
See price & reviews on AmazonLinks open in a new tab.