Flash: Cart Drawer & Upsell vs UpCart‑ Cart Drawer & Upsell
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Nov 2, 2026 for Flash, Jul 8, 2026 for UpCart‑ Cart Drawer & Upsell.
The short answer
- On the Shopify App Store: Flash 5.0 from 33 reviews and UpCart‑ Cart Drawer & Upsell 3.0 from 2 reviews.
- UpCart‑ Cart Drawer & Upsell lists 8 features Flash’s listing doesn’t mention, including Announcements, Countdown timers, Custom CSS.
Head to head
Momentum
New reviews each month
Review pace is the clearest public read on how fast an app is winning new merchants.
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureCustomize your cart drawer to boost Average Order Value (AOV) with AI-powered upsells and a rewards progress bar that motivates customers to unlock free shipping and free gifts. Add countdown timers to drive urgency, a discount code box and cart notes for a smoother checkout, and trust badges to build confidence. A sticky add-to-cart button keeps checkout just one tap away.
Upcart — Cart Drawer & Upsell Turn your cart into a high-converting sales engine with smart progress bars, targeted rewards, and seamless upsells. Upcart helps merchants increase AOV, reduce cart abandonment, and create engaging checkout experiences with fully responsive cart drawers for both mobile and desktop stores.
- Customizable slide-out cart drawer
- Tiered rewards and shipping progress indicators
- In-cart announcement bar with countdown timers
- Dynamic progress bars to uplift cart value and encourage bigger orders.
- Gifts products and BXGY offers added automatically in the cart.
- Countdown timers and announcement bars to drive urgency and promotions.
- Capture order notes, mobile responsive, multi-currency, and third-party ready.
All the numbers
Every figure, side by side
A green dot marks the app ahead on a measured figure. Estimates, gaps and apps that leave no storefront trace never take the lead.
Adoption
| Measure |  Flash |  UpCart‑ Cart Drawer & Upsell |
|---|---|---|
| Detected stores | Not published | Not published |
| Net store change, 28 days | 0 | 0 |
| Stores added, 28 days | Not enough data | Not enough data |
| Big-brand share | Not enough data | Not enough data |
| Top store categories | Not published | Not published |
| Top store countries | Not published | Not published |
Reviews
| Measure | Flash | UpCart‑ Cart Drawer & Upsell |
|---|---|---|
| App Store rating | 5.0 ★(ahead) | 3.0 ★ |
| App Store reviews | 33(ahead) | 2 |
| New reviews, 28 days | Not enough data | Not enough data |
| Reviewers a year or more in | 0% | Not enough data |
Pricing
| Measure | Flash | UpCart‑ Cart Drawer & Upsell |
|---|---|---|
| Free plan | Not listed | Not listed |
| Lowest paid monthly plan | No monthly plan listed | No monthly plan listed |
| Longest free trial | Not listed | Not listed |
| Plans listed | Not published | Not published |
Listing
| Measure | Flash | UpCart‑ Cart Drawer & Upsell |
|---|---|---|
| Shopify category rank | #29(ahead) | #85 |
| Shopify App Charts | #5 on Rookies in Cart customization | Not on this week’s charts |
| Built for Shopify | Yes | No |
| Launched | Apr 13, 2026 | Nov 14, 2025 |
| Languages | 9 | 1 |
| Developer | Zenkai Apps | Digi Sidekick |
FAQ
Flash and UpCart‑ Cart Drawer & Upsell: common questions
- Which has better reviews, Flash or UpCart‑ Cart Drawer & Upsell?
- On the Shopify App Store: Flash 5.0 from 33 reviews and UpCart‑ Cart Drawer & Upsell 3.0 from 2 reviews.
- What features does each app list that the other doesn’t?
- Flash lists 2 the others don’t mention, such as Free gifts, Frequently bought together. UpCart‑ Cart Drawer & Upsell lists 8 the others don’t mention, such as Announcements, Countdown timers, Custom CSS, Custom notes. A feature missing from a listing may still be supported; this compares what each App Store listing says.
- Where does this comparison’s data come from?
- Shoplist crawls Shopify storefronts to detect which apps each store runs, and reads each app’s Shopify App Store listing for reviews, pricing, features and integrations. Store counts are as of Nov 2, 2026 for Flash, Jul 8, 2026 for UpCart‑ Cart Drawer & Upsell; estimated figures are labeled.
How Shoplist compares apps
Store counts come from Shoplist’s crawl of Shopify storefronts, which detects the apps each store runs; they are as of Nov 2, 2026 for Flash, Jul 8, 2026 for UpCart‑ Cart Drawer & Upsell. Reviews, ratings, plans, features and integrations come from each app’s Shopify App Store listing. 28-day figures are labeled when estimated, and a figure that is missing or estimated never decides who leads. Read the methodology.