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🔬 Lab Findings 🔧 Stack Builder

Personalisation Apps for Shopify — Performance Ranked

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

10 Apps benchmarked
6 Grade A or B
27 ms Avg CPU cost
108 ms Avg mobile CPU
★ 4.8 Avg merchant rating
FASTEST

3DLOOK is the lightest personalization and product recommendations app we've tested — 60.74 KB payload and 10 ms CPU (Grade B).

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#1
B
3DLOOK
by 3DLOOK
📦 60.74 KB
⚡ 10 ms desktop
📱 43 ms mobile ✓
📐 Layout stable
Acceptable
#2
B
Boomtrain
by Zeta Global
📦 96.54 KB
⚡ 21 ms desktop
📱 64 ms mobile ✓
Acceptable
#3
B
MoEngage
by MoEngage Inc.
📦 100.16 KB
⚡ 16 ms desktop
📱 92 ms mobile ✓
★ 5 2
Acceptable
#4
B
Variant Option Product Options
by StarApps Studio
📦 53.55 KB
⚡ 3 ms desktop
📱 19 ms mobile ✓
★ 4.6 607
Acceptable
#5
B
Wunderkind
by Wunderkind
📦 49.38 KB
⚡ 14 ms desktop
📱 56 ms mobile ✓
Acceptable
#6
B
Zepto Product Personalizer
by ZeptoApps
📦 92.97 KB
⚡ 24 ms desktop
📱 67 ms mobile ✓
Acceptable
#7
C
Ablyft
by Ablyft
📦 291.54 KB
⚡ 19 ms desktop
📱 69 ms mobile ✓
Heavy
#8
C
Moonshot AI
by Moonshot AI
📦 232.81 KB
⚡ 54 ms desktop
📱 127 ms mobile ✓
Heavy
#9
D
Kiwi Sizing
by Kiwi Sizing
📦 521.05 KB
⚡ 70 ms desktop
📱 331 ms mobile ✓
★ 4.8 1k
Critical
#10
D
Playbook
by Playbook
📦 536.14 KB
⚡ 34 ms desktop
📱 178 ms mobile ✓
★ 5 3
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 →