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🔬 Lab Findings 🔧 Stack Builder

Popups Apps for Shopify — Performance Ranked

8 benchmarked popups, email capture, and conversion optimization apps, ranked by real JavaScript overhead measured in StackConflict's clean-room lab.

8 Apps benchmarked
2 Grade A or B
134 ms Avg CPU cost
536 ms Avg mobile CPU
★ 4.5 Avg merchant rating
FASTEST

Attrac is the lightest popups, email capture, and conversion optimization app we've tested — 12.34 KB payload and 4 ms CPU (Grade A).

No apps match your search.
#1
A
Attrac
by AppHero
📦 12.34 KB
⚡ 4 ms desktop
📱 26 ms mobile ✓
Lightweight
#2
B
OptinMonster
by Retyp, LLC
📦 41.02 KB
⚡ 9 ms desktop
📱 49 ms mobile ✓
★ 2.9 14
Acceptable
#3
C
OptiMonk
by OptiMonk
📦 168.41 KB
⚡ 134 ms desktop
📱 395 ms mobile ✓
★ 4.7 429
Heavy
#4
C
Pop Convert
by Pop Convert
📦 329.81 KB
⚡ 48 ms desktop
📱 163 ms mobile ✓
★ 4.9 8k
Heavy
#5
C
PopConvert
by PopConvert
📦 329.81 KB
⚡ 37 ms desktop
📱 151 ms mobile ✓
Heavy
#6
C
Popup Window
by LifterApps
📦 326.89 KB
⚡ 90 ms desktop
📱 425 ms mobile ✓
Heavy
#7
D
Caption
by Caption
📦 517.67 KB
⚡ 76 ms desktop
📱 127 ms mobile ✓
★ 5 5
Critical
#8
D
Poptin
by Poptin
📦 362.66 KB
⚡ 675 ms desktop
📱 941 ms mobile ✓
★ 4.9 302
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 →