The Dreame D series is the basic lineup that lacks mop washing and self-cleaning features. However, it has a lower price tag and some basic features for a small home.
Affordable D series
| Features |  D9 Max Gen 2 |
 D10 Plus Gen 2 |
 D20 Pro Plus |
|---|---|---|---|
| Price | $279.99 Amazon | $200.99 Amazon | $365.99 Amazon |
| Cleaning specs | |||
| Suction power (Pa) | 6,000 | 6,000 | 13,000 |
| Battery life (min) | 180 | 180 | 180 |
| Battery capacity (mAh) | 5,200 | 5,200 | 5,200 |
| Dustbin capacity (ml) | 350 | 350 | 350 |
| Height of the robot (in / cm) | 3.82 / 9.7 | 3.82 / 9.7 | 3.82 / 9.7 |
| Climbing ability (in / mm) | 0.79 / 20 | 0.79 / 20 | 0.79 / 20 |
| Roller system | Single | Single | Dual |
| Filter type | HEPA | HEPA | HEPA |
| Cliff/obstacle sensors | yes | yes | yes |
| Recharge & Resume cleaning | yes | yes | yes |
| Navigation | |||
| Multi-map support | yes | yes | yes |
| Navigation System | LDS | LDS | LDS |
| Obstacle Avoidance | yes | yes | yes |
| Side sweeper extension | no | no | yes |
| Self-emptying base | |||
| Disposable bag capacity (ml) | - | 4,000 | 3,000 |
| Self-emptying | - | yes | yes |
| Mopping | |||
| Water tank capacity | 235 ml | 150 ml | 350 ml |
| Electronic water tank | yes | yes | yes |
| App | |||
| App | Dreamehome | Dreamehome | Dreamehome |
| Virtual boundaries / Blocked areas | yes | yes | yes |
| Zone cleaning | yes | yes | yes |
| Room recognizing / scheduling by room | yes | yes | yes |
| Mopping | yes | yes | yes |
| Carpet identification | yes | yes | yes |
| Scheduling | yes | yes | yes |
The D series features a basic self-emptying station and a mopping system that combines a water tank with a single pad. The D series is not suitable for deep carpet cleaning but is a good vacuum for hard floors and surface cleaning.
The mopping system is the most basic technology, which is an electric water tank that supplies water to the mopping pad.
The D9 Max Gen 2 is the only robot that does not have a self-emptying station. The only reason to go with it is if you don't have more space for a taller station, since there is a small difference in price between it and the D10 Plus Gen2, which comes with a station.
The D10 Plus Gen 2 is similar to the D9 Max Gen 2, but it has a smaller water tank.
Suitable for a small apartment and pet owners
Best value
Upgrades over the D10 Plus Gen 2:
- Side brush extension around obstacles
- More power
- The dual roller system provides better pick-up performance
- Larger water tank
It is the best model in the D series with strong suction, a bigger mopping area, and the new dual roller system.
For bigger homes with carpets and some hard floor areas
Note that the D series' mopping is for the daily routine; it would not clean the stains or do a good job. The D series is a great buy for hard floors or to keep the floors clean daily. For anything bigger, better get the L series.
The Dreame D20 Plus vs. D20 Pro Plus
The Dreame D20 Pro Plus has a smaller disposable bag (3L vs. 5L), yet extends a side brush, which the D20 Plus lacks. The D20 Pro Plus automatically boosts suction when stepping on carpets.
- Flex Arm vacuuming (side brush extend)
- Carpet boost
The price difference isn't much, so I would recommend going with the D20 Pro Plus.
Summing up
The D series is a budget lineup made for a small home and daily routine. It does not perform the best or have the strong suction of the premium X series, ot it's advanced self-cleaning station. However, it is a budget option that still shines for under $300.
Editor's choice: Dreame D20 Pro Plus
More suction, covers a bigger hard floor area for mopping, and does not have a big price difference compared to the other models.