The eufy Security Smart Lock FamiLock S3 Max ($329.99) is a top pick with a 9.3/10 consensus score across 5 expert reviews. Experts highlight only pick combining the fastest read, a grade 1 body, and dual-power survivability and dual power means a standard-battery emergency cell keeps pin access alive at 0 percent. Best for: Touchless-first households that fear a doorstep lockout most.
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eufy Security Smart Lock FamiLock S3 Max
Palm-Vein Smart Lock
SmartHomeExplorer proprietary rating
5 expert sources
The eufy Security Smart Lock FamiLock S3 Max earns a SHE Score of 6.6/10, driven by strong value (9/10) with room to improve in future-proofing (5/10). Based on 5 expert sources and SmartHomeExplorer compatibility analysis.
How we calculate the SHE Score →Expert Consensus: 9.3/10 across 5 sources
Last verified:Key Features
- ✓ Sub-0.1s palm read, vendor-rated 99.99999 percent
- ✓ ANSI/BHMA Grade 1 deadbolt body
- ✓ 2K HDR doorbell camera with 16GB storage
- ✓ Dual power: rechargeable lithium plus emergency cell
Best For
What Experts Agree On
What Experts Love
- ✓ Only pick combining the fastest read, a Grade 1 body, and dual-power survivability
- ✓ Dual power means a standard-battery emergency cell keeps PIN access alive at 0 percent
- ✓ Five independent unlock paths, anchored by a fingerprint second biometric
- ✓ 2K HDR doorbell and 16GB storage fold a camera into the lock you already need
Common Criticisms
- ✗ At $329.99 it is the most expensive pick in this roundup
- ✗ Wi-Fi only with no Matter, so HomeKit and SmartThings buyers lose native support
- ✗ The camera rig adds setup steps the keypad-only eufy E34 skips
What The Experts Say
Ready to buy the eufy Security Smart Lock FamiLock S3 Max?
Check Price on Amazon$329.99 · 5 expert sources · 9.3/10 consensus
Frequently Asked Questions
Is the eufy Security Smart Lock FamiLock S3 Max worth it?
eufy Security Smart Lock FamiLock S3 Max earns a 9.3/10 consensus score across our 12 expert sources. It is rated "Must Buy" — Touchless-first households that fear a doorstep lockout most. At $329.99, it ranks among the top picks in its category.
Who is the eufy Security Smart Lock FamiLock S3 Max best for?
eufy Security Smart Lock FamiLock S3 Max is best for: Touchless-first households that fear a doorstep lockout most. Experts rate it "Must Buy" overall.
How does the eufy Security Smart Lock FamiLock S3 Max compare to other Security options?
Among the Security products we have reviewed, eufy Security Smart Lock FamiLock S3 Max ranks above average with a 9.3/10 score. See our full category comparison for more details.
What smart home systems does the eufy Security Smart Lock FamiLock S3 Max work with?
eufy Security Smart Lock FamiLock S3 Max works with major smart home platforms. Check our compatibility notes on the product page for any setup requirements or hub dependencies.
What are the pros and cons of the eufy Security Smart Lock FamiLock S3 Max?
The main pros of the eufy Security Smart Lock FamiLock S3 Max are only pick combining the fastest read, a grade 1 body, and dual-power survivability and dual power means a standard-battery emergency cell keeps pin access alive at 0 percent. The main downside is at $329.99 it is the most expensive pick in this roundup. Overall, experts rate it "Must Buy" with a 9.3/10 consensus score.
Affiliate disclosure: SmartHomeExplorer.com participates in the Amazon Associates program. We earn a commission from qualifying purchases at no extra cost to you. This consensus review is based on 5 independent expert reviews — we did not test this product ourselves. Always verify current prices and availability before purchasing.