August Wi-Fi Smart Lock vs eufy FamiLock S3 Max
Side-by-side comparison based on published product information. Check Amazon for current price and availability.
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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 We do not present unpublished laboratory or in-home measurements as our own testing.
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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.
August Wi-Fi Smart Lock
August
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Feature comparison
| Feature | August Wi-Fi Smart Lock | eufy FamiLock S3 Max |
|---|---|---|
| Installation | Retrofit over an existing single-cylinder deadbolt, interior side, under 10 minutes | — |
| Connectivity | Built-in Wi-Fi (802.11 b/g/n, 2.4 or 5 GHz) plus Bluetooth, no bridge required | Built-in Wi-Fi (direct), Matter, Apple Home, Alexa, Google Home, SmartThings |
| Door status | DoorSense sensor reports whether the door is open or securely closed | — |
| Smart home | Works with Alexa, Google Assistant, and Siri; phone or Apple Watch acts as key | — |
| Power | 2 CR123 batteries, included in the box | 15,000 mAh rechargeable pack + 4 AAA backup, up to 5 months, 5V/2A charging |
| Dimensions | 72 mm diameter, 46 mm depth | — |
| Certification | Not ANSI/BHMA certified — mounts on an existing certified deadbolt (per August warranty page) | — |
| Entry methods | August app (iOS/Android), Apple Watch, existing physical key, optional keypad (sold separately), Alexa/Google Assistant/Siri voice, Auto-Unlock | — |
| Key backup | Retrofit keeps the existing exterior cylinder — original keys still work | Physical key (published unlock methods include keys) |
| Warranty | 1-year limited hardware warranty | 18 months (36 months for mechanical parts, eufy smart lock warranty) |
| 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 |
| Security certification | — | ANSI/BHMA Grade 1, IP65 (-22°F to 158°F) |
| Codes/fingerprints capacity | — | Palm vein profiles for up to 50 family members |
| Door compatibility | — | Most standard doors 35–55 mm thick |