eufy FamiLock S3 Max vs eufy Smart Lock C220
Side-by-side comparison based on published product information. Check Amazon for current price and availability.
How we evaluate products
We compare published manufacturer specifications, manuals, support policies, and relevant public guidance. We do not present unpublished laboratory or in-home measurements as our own testing.
Features and services can change, so confirm current details with the manufacturer before buying. Affiliate commissions do not determine our editorial criteria.
In a nutshell
eufy FamiLock S3 Max vs eufy Smart Lock C220: two SafeHive picks compared across 14 published specifications. Use the feature table below to match published specifications to your storage, power, and monitoring requirements. We do not assign an overall score without retained independent test evidence.
Key facts
- Unlock methods:
- Palm vein, app, voice control, keypad password, physical key vs —
- Camera:
- 2K HDR, 150° x 150° view (180° diagonal), night vision vs —
- Display:
- 4-inch interior screen, 1080p vs —
- Connectivity:
- Built-in Wi-Fi (direct), Matter, Apple Home, Alexa, Google Home, SmartThings vs Built-in Wi-Fi, no hub or bridge required
Key takeaways
- eufy FamiLock S3 Max — Palm vein entry reads beneath the skin, working for kids and seniors
- eufy Smart Lock C220 — AI fingerprint reader recognizes a print in under 0.3 seconds and stores up to 50 prints
SafeHive· Updated July 31, 2026· How we evaluate products
Feature comparison
| Feature | eufy FamiLock S3 Max | eufy Smart Lock C220 |
|---|---|---|
| Unlock methods | Palm vein, app, voice control, keypad password, physical key | — |
| Camera | 2K HDR, 150° x 150° view (180° diagonal), night vision | — |
| Display | 4-inch interior screen, 1080p | — |
| Connectivity | Built-in Wi-Fi (direct), Matter, Apple Home, Alexa, Google Home, SmartThings | Built-in Wi-Fi, no hub or bridge required |
| Security certification | ANSI/BHMA Grade 1, IP65 (-22°F to 158°F) | — |
| Power | 15,000 mAh rechargeable pack + 4 AAA backup, up to 5 months, 5V/2A charging | 8 AA batteries (included), about 8 months, emergency power port with no data circuit |
| Codes/fingerprints capacity | Palm vein profiles for up to 50 family members | — |
| Key backup | Physical key (published unlock methods include keys) | 2 physical keys included |
| Door compatibility | Most standard doors 35–55 mm thick | Door thickness 35–55 mm; crossbore center to top of handleset >45 mm; not compatible with mortise locks |
| Warranty | 18 months (36 months for mechanical parts, eufy smart lock warranty) | 18 months (36 months for mechanical parts) |
| Entry methods | — | Fingerprint, keypad code, app, voice control, physical key (2 included) |
| Fingerprint | — | AI fingerprint recognition in under 0.3 seconds, stores up to 50 fingerprints |
| Codes | — | Up to 100 passcodes, guest profiles managed in the app |
| Certification | — | ANSI/BHMA Grade 3, IP53 weather resistance |