Winner
13% OFF
$129.99
$149.99
Updated November 2026
Data from the official aosu and Eufy sites.
2026 verdict
For a subscription-free video doorbell, the aosu Video Doorbell R1 Ultra is the stronger buy of this pair on hardware, rated higher by its owners than the Eufy Video Doorbell C31 (with Battery Pack).
It backs that up with a 5MP sensor and a 166 degree diagonal view against the Eufy's 2K, dual-band Wi-Fi where the Eufy is 2.4 GHz only, color night vision the Eufy's own documentation does not claim, customizable motion zones, and radar plus PIR and AI detection, all recorded free to an included base station with 60-day loop recording. The Eufy Video Doorbell C31 (with Battery Pack) is cheaper and simpler, recording 2K locally to a microSD card or a Eufy HomeBase with no monthly fee, offering a quick-release rechargeable battery or wired power, automatic replies, 24/7 history when paired with a HomeBase, and Home Assistant support alongside Google Home and Alexa. Owners report its real battery life falling short of the claims, with no low-battery warning, a bulkier body and no chime in the box. Buy the Eufy Video Doorbell C31 (with Battery Pack) if you already run a Eufy HomeBase; otherwise the aosu Video Doorbell R1 Ultra offers a better camera and smarter detection for a similar outlay.
Works with
Connectivity
- Wi-Fi 2.4/5 GHz
vs
Works with
Connectivity
- Wi-Fi 2.4 GHz
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| Feature | aosu Video Doorbell R1 Ultra | Eufy Video Doorbell C31 (with Battery Pack) | Winner |
|---|---|---|---|
| Rating | 4.4 | 4.1 | aosu Video Doorbell R1 Ultra |
| Connectivity | 2.4 GHz WiFi, 5 GHz WiFi | 2.4 GHz WiFi | aosu Video Doorbell R1 Ultra |
| Alerts | Motion, People, Packages, Familiar Faces | Motion, People | aosu Video Doorbell R1 Ultra |
| Price | $129.99 | $129.99 | Tie |
| Warranty | 1 year | 1 year | Tie |
| Integrations | Google Home, Alexa | Google Home, Alexa, Home Assistant | Tie |
| Storage | Internal, Cloud | MicroSD Card Slot, Cloud | Tie |
| No Subscription Required | YES | YES | Tie |
What the differences mean
Camera and night vision
The aosu Video Doorbell R1 Ultra's 5MP sensor supports color night vision alongside black-and-white. The Eufy Video Doorbell C31 (with Battery Pack) documents black-and-white night vision only, and its own manual warns that a side wall in view can blur it by reflecting the IR light.
Connectivity
The aosu Video Doorbell R1 Ultra supports dual-band 2.4 and 5 GHz Wi-Fi. The Eufy Video Doorbell C31 (with Battery Pack) is 2.4 GHz only.
Detection and alerts
The aosu Video Doorbell R1 Ultra combines radar, PIR and AI detection with customizable motion zones and people detection. The Eufy Video Doorbell C31 (with Battery Pack) detects people and motion but has no package, animal or vehicle detection at all, and does not document motion zone customization.
Continuous recording
The Eufy Video Doorbell C31 (with Battery Pack) offers 24/7 video history when paired with a Eufy HomeBase. The aosu Video Doorbell R1 Ultra's storage is event-based 60-day loop recording only, with no continuous option.
Home Assistant
The Eufy Video Doorbell C31 (with Battery Pack) works with Home Assistant. The aosu Video Doorbell R1 Ultra's Home Assistant support is undocumented.
Which one to buy if
- you already own a Eufy HomeBase
It plugs straight into 24/7 continuous recording there; the aosu doorbell has no continuous recording option at all.
- you want color night vision and dual-band Wi-Fi
It documents both; the Eufy doorbell is 2.4 GHz only with black-and-white night vision alone.
- package or vehicle alerts matter, even behind a subscription
It at least offers package detection as a paid add-on; the Eufy doorbell has no package, animal or vehicle detection at all.
- the lowest price is the priority
The Eufy Video Doorbell C31 (with Battery Pack) is the cheaper of the two.
Winner
13% OFF
$129.99
$149.99
- + Rating: 4.4
- + Connectivity: 2.4 GHz WiFi, 5 GHz WiFi
- + Alerts: Motion, People, Packages, Familiar Faces
$129.99
- - Rating: 4.1 vs 4.4
- - Connectivity: 2.4 GHz WiFi vs 2.4 GHz WiFi, 5 GHz WiFi
What owners say
Owners who have cycled through several doorbell brands, including Eufy, single out the aosu Video Doorbell R1 Ultra's install as the cleanest of the bunch, and like its strong 5MP resolution and dual-band Wi-Fi; their complaints are inconsistent real-world battery life and, for one buyer, unreliable human detection. Eufy Video Doorbell C31 (with Battery Pack) owners choose it specifically to avoid a monthly fee, recording locally to a microSD card or a Eufy HomeBase, and like the quick-release battery that pops out to charge without removing the unit from the wall; their most common complaint is battery life falling well short of the rated figure, with no low-battery warning, on top of a bulkier body and no indoor chime included.
Frequently Asked Questions
Which is better overall, the aosu Video Doorbell R1 Ultra or the Eufy Video Doorbell C31 (with Battery Pack)?
The aosu Video Doorbell R1 Ultra, thanks to a 5MP sensor, dual-band Wi-Fi, color night vision, custom motion zones and 60 days of included local recording. The Eufy Video Doorbell C31 (with Battery Pack) wins on price and on Home Assistant support with automatic replies.
Do either require a subscription?
No for the basics. The aosu Video Doorbell R1 Ultra records to its included base station, though package and familiar-face alerts need a plan. The Eufy Video Doorbell C31 (with Battery Pack) records to a microSD card or a Eufy HomeBase with no monthly fee at all.
How do the cameras differ?
The aosu Video Doorbell R1 Ultra uses a 5MP sensor with a 166 degree diagonal view plus color and black-and-white night vision. The Eufy Video Doorbell C31 (with Battery Pack) shoots 2K but documents black-and-white night vision only, with no color option and no stated field of view.
Which connects more reliably?
The aosu Video Doorbell R1 Ultra supports both 2.4 and 5 GHz Wi-Fi, which helps on busy networks. The Eufy Video Doorbell C31 (with Battery Pack) is 2.4 GHz only, and it also lacks HomeKit and Matter, as does the aosu.
Who should buy the Eufy Video Doorbell C31 (with Battery Pack)?
Owners of a Eufy HomeBase who want cheap 2K recording with no fees, a quick-release battery and Home Assistant integration, and who can live with modest battery life and a bulky body.
Who should buy the aosu Video Doorbell R1 Ultra?
Buyers who want a sharper camera, color night vision and smarter radar-plus-AI detection for a similar price, and do not specifically need a Eufy HomeBase.
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