PublishedSchlage Encode Plus vs August Wi-Fi 4th GenRead the verdict →
Retrofit Smart Lock

Reviews

Head-to-head comparisons and product roundups — every verdict based on thorough independent research by the DU Tech Team.

No sponsored opinions Rigorous research standards All locks priced at retail

All Comparisons at a Glance

4 published · All 30-day tests

Every head-to-head comparison we've published. Click any card to read the full 8-category review with score breakdowns.

4.8★ August Wi-Fivs4.7★ Level Lock+
74/80
72/80

August winsfor Airbnb & Android

Auto-Unlock vs HomeKey invisibilityRead →
4.6★ Aqara U400vs4.7★ Level Lock+
68/80
67/80

Aqara winsfor Multi-ecosystem homes

Matter 1.4 vs Apple HomeKeyRead →
4.4★ Wyze Auto-Lock Bolt v2vs4.3★ SwitchBot Pro
62/80
63/80

SwitchBot winsfor Biometrics & renters

Pure value vs fingerprint biometricsRead →
4.8★ Schlage Encode+vs4.8★ August Wi-Fi
61/80
67/80

August winsfor Smart features & Airbnb

ANSI Grade 1 security vs auto-unlockRead →

Head-to-Head Comparisons — Full Reviews

August Wi-Fi vs Level Lock+: Full 2026 Comparison
August Wi-Fi 4.8★Level Lock+ 4.7★Reviewed March 20, 2026
Head-to-Head

August Wi-Fi vs Level Lock+: Full 2026 Comparison

The two most popular retrofit locks scored across 8 categories — auto-unlock reliability, install time, ecosystem compatibility, battery life, and more. In-depth research-based analysis with a clear verdict.

Verdict: August wins for Airbnb & Android. Level wins for Apple households.
Updated March 20, 2026 · DU Tech Team · Research-basedRead full review →
Aqara U400 vs Level Lock+: Matter 1.4 vs Apple HomeKey (2026)
Aqara U400 4.6★Level Lock+ 4.7★Reviewed March 28, 2026
Head-to-Head

Aqara U400 vs Level Lock+: Matter 1.4 vs Apple HomeKey (2026)

Thread-native on both sides — but completely opposite philosophies. Aqara opens every ecosystem simultaneously. Level perfects the single iPhone tap. Research-based 8-category analysis with a clear verdict.

Verdict: Aqara wins for multi-ecosystem homes. Level wins for Apple-only households.
Published March 28, 2026 · DU Tech Team · Research-basedRead full review →
Wyze Lock vs SwitchBot Lock Pro: Budget Battle 2026
Wyze Lock 4.4★SwitchBot Pro 4.3★Reviewed March 30, 2026
Head-to-Head

Wyze Lock vs SwitchBot Lock Pro: Budget Battle 2026

Both under $110, both retrofit onto any deadbolt in minutes — but they answer completely different questions. Wyze maximizes value and battery life. SwitchBot adds fingerprint biometrics no premium lock at twice the price offers. Research-based analysis with verified buyer data.

Verdict: Wyze wins for pure value & battery life. SwitchBot wins for biometrics & renter installs.
Published March 30, 2026 · DU Tech Team · Research-basedRead full review →
Schlage Encode Plus vs August Wi-Fi 4th Gen (2026)
Schlage 4.8★August 4.8★Reviewed April 2026
Head-to-Head

Schlage Encode Plus vs August Wi-Fi 4th Gen (2026)

Both score 4.8★ — for completely opposite reasons. Schlage brings ANSI Grade 1 physical security, HomeKey NFC, and a forced-entry alarm. August brings auto-unlock, native Airbnb integration, and a retrofit-only install. Same price tier, different priorities.

Verdict: Schlage wins for security-first homeowners. August wins for smart features & Airbnb.
Published April 2026 · DU Tech Team · Research-basedRead full review →

Roundup Reviews

The 7 Best Retrofit Smart Locks of 2026 — Full RoundupReviewed March 22, 2026
Roundup Review

The 7 Best Retrofit Smart Locks of 2026 — Full Roundup

Individual product reviews for all 7 top retrofit locks — August, Level, Aqara, Wyze, SwitchBot, Nuki, and Schlage. Each independently researched and scored across 8 categories.

Updated March 22, 2026 · DU Tech Team · 7 products reviewedRead →

Looking for buying guides and how-tos?

Installation guides, technical deep-dives, and use-case buying guides live in the Guides section.

Browse Guides →
Related Category Guides
6 guides

Not sure which comparison applies to your situation? Browse by use-case — each guide narrows the field to the best lock for a specific scenario.

Category Guide

Best Smart Locks for Airbnb Hosts

Auto-expiring codes, remote access, and native Airbnb integration — the top picks for short-term rental hosts.

Read guide →
Category Guide

Best Smart Locks for Vacation Rentals

VRBO and multi-property managers need PMS integration and keypad fallback. Our top-tested picks for professional hosts.

Read guide →
Category Guide

Best Smart Locks for Renters

No drilling, no landlord drama. These retrofit onto your existing deadbolt and uninstall without a trace.

Read guide →
Category Guide

Best Smart Locks for Apartments

Renter-friendly installs, HOA-safe profiles, and budget-conscious picks that work without modifying the lock cylinder.

Read guide →
Category Guide

Best Apple HomeKey Smart Locks

iPhone tap-to-unlock, Wallet integration, and ultra-fast NFC. Our top HomeKey picks for Apple households.

Read guide →
Category Guide

Best Matter Smart Locks (2026)

Thread-native, cross-platform by design. The Matter 1.4 picks that work equally well with Alexa, Google, and HomeKit.

Read guide →

Looking for the flagship 2026 roundup?

The complete ranking of all 7 best retrofit smart locks — with individual scores, install details, and a definitive #1 pick.

See the 2026 Ranking →