Bold Upsell vs Ultimate Sales Boost: Shopify Performance Comparison
⏳ Data pending for Bold Upsell — our scanner captured only the async loader stub for this app. Full bundle metrics are being collected from live Shopify storefronts. Once available, this page will show a complete head-to-head comparison.
Both Bold Upsell and Ultimate Sales Boost provide post-purchase upsell and cross-sell functionality for Shopify stores.
What We Know: Ultimate Sales Boost (Benchmarked)
Ultimate Sales Boost has been measured in StackConflict’s clean-room lab:
| Metric | Ultimate Sales Boost |
|---|---|
| Overall Grade | D |
| JS Payload | 645.46 KB |
| CPU Desktop | 55 ms |
| CPU Mobile | 318 ms (0.3s) |
| Layout Shift | 0.0006 |
Grade D indicates Ultimate Sales Boost carries a significant JavaScript footprint. Check the full report for lighter alternatives in this category.
View full Ultimate Sales Boost speed report →
Pending: Bold Upsell
StackConflict’s scanner detected that Bold Upsell uses an async JavaScript loader — a small stub that only initialises its full bundle on a real, authenticated Shopify storefront. This means our lab environment captured the tiny stub file only, not the production bundle that actually runs on live stores.
We are collecting real bundle data by scanning public Shopify storefronts. Once captured, the head-to-head metrics for Bold Upsell will appear here automatically.
View Bold Upsell on Shopify App Store →
About This Test
StackConflict measures each Shopify app in an isolated clean-room environment — a Playwright-controlled browser with no other scripts installed. V8 CPU cost is the ScriptDuration delta measured before and after bundle injection. Mobile CPU applies the standard 4× Lighthouse slowdown factor.
Ultimate Sales Boost data from the StackConflict Lab (2026-05-30). Bold Upsell data pending.