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🔬 Lab Findings 🔧 Stack Builder

Reviews Apps for Shopify — Performance Ranked

10 benchmarked product reviews and UGC collection apps, ranked by real JavaScript overhead measured in StackConflict's clean-room lab.

10 Apps benchmarked
6 Grade A or B
15 ms Avg CPU cost
60 ms Avg mobile CPU
★ 4.9 Avg merchant rating
FASTEST

Loox Product Reviews is the lightest product reviews and UGC collection app we've tested — 105.19 KB payload and 8 ms CPU (Grade B).

No apps match your search.
#1
B
Loox Product Reviews
by Loox
📦 105.19 KB
⚡ 8 ms desktop
📱 57 ms mobile ✓
★ 4.9 8k
Acceptable
#2
B
Opinew
by Opinew
📦 31.49 KB
⚡ 10 ms desktop
📱 36 ms mobile ✓
📐 Layout stable
Acceptable
#3
B
Rivyo Product Reviews
by WebContrive
📦 84.5 KB
⚡ 9 ms desktop
📱 26 ms mobile ✓
Acceptable
#4
B
Stamped.io
by Stamped.io
📦 107 KB
⚡ 13 ms desktop
📱 49 ms mobile ✓
Acceptable
#5
B
Trustpilot
by Trustpilot
📦 91.95 KB
⚡ 3 ms desktop
📱 18 ms mobile ✓
📐 Layout stable
★ 5 1
Acceptable
#6
B
Yotpo Reviews
by Yotpo
📦 106.5 KB
⚡ 18 ms desktop
📱 90 ms mobile ✓
★ 4.8 4k
Acceptable
#7
C
Growave Reviews
by Growave
📦 424.91 KB
⚡ 21 ms desktop
📱 126 ms mobile ✓
Heavy
#8
C
Loox – Referrals
by Loox
📦 274.54 KB
⚡ 3 ms desktop
📱 8 ms mobile ✓
★ 4.9 8k
Heavy
#9
C
Reviews.io
by REVIEWS.io
📦 391.95 KB
⚡ 8 ms desktop
📱 33 ms mobile ✓
📐 Layout stable
★ 5 6
Heavy
#10
D
Okendo
by Okendo
📦 513.59 KB
⚡ 54 ms desktop
📱 134 ms mobile ✓
★ 4.8 1k
Critical

How we measure — Each app is injected into a clean Shopify dev store in a Playwright-controlled browser with no other apps installed. V8 CPU cost is the ScriptDuration delta before and after injection. Mobile estimate applies Google Lighthouse's 4× slowdown factor.

Read the full methodology →