Flash Sale Insights vs RealtimeStack : Live Analytics
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Oct 13, 2026 for Flash Sale Insights, Nov 9, 2026 for RealtimeStack.
The short answer
- Only RealtimeStack lists a free plan. Paid plans start at $7.99/month for Flash Sale Insights and $14/month for RealtimeStack.
- RealtimeStack lists 16 features Flash Sale Insights’s listing doesn’t mention, including Abandoned cart, Activity tracking, Benchmarking.
Head to head
- United States
- United Kingdom
- Australia
Momentum
New reviews each month
Review pace is the clearest public read on how fast an app is winning new merchants.
Starter Plan
Free
- · Live map
- · One active view
- · See online customers
Basic
- · 14 days data retention
- · 5 active views
- · Broken links / out of stock
- · Full UTM tracking
- · Inspect abandoned carts
- · Live map (24hr)
Grow
- · 10 active views
- · 90 days data retention
- · Broken links / out of stock
- · Full UTM tracking
- · Historic Analytics
- · Inspect abandoned carts
Pro
- · 365 days data retention
- · Broken links / out of stock
- · Full UTM tracking
- · Historic Analytics
- · Inspect abandoned carts
- · Live map (24hr)
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureUnlock real-time sales data with Flash Sale Insights. In the busy world of online retail, staying ahead of the curve is crucial. Flash Sale Insights empowers you with a back office real-time feed of your daily top-selling products. Unlock a simple, best-sellers feed with your product images front-and-center. We're brand new to the app store and we want to hear your feedback!
RealtimeStack shows you exactly what's happening in your store the moment it happens. Track every product view, search, cart addition, checkout and abandonment in real time — live data, not yesterday's reports. Explore customer activity in a 3D world view and live tables that update instantly.
- Seamlessly toggle between top-selling products and variants in a grid or a list.
- Stay focused on what is selling today and stay ahead of sales and merchandizing.
- A live "war-room" allowing you to monitor top-selling products during campaigns.
- Visualize in real-time customers and customer actions
- Use Live Tables to get insights into customer behavior and trends
- World heat map of customers and their actions
- Track and analyze ad campaigns
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 Sale Insights |  RealtimeStack |
|---|---|---|
| Detected stores | Not published | 2,037 |
| Net store change, 28 days | 0 | +2 |
| Stores added, 28 days | Not enough data | 24 |
| Big-brand share | Not enough data | 9% |
| Top store categories | Not published | Apparel & Accessories, Home & Garden, Health & Beauty |
| Top store countries | Not published | United States, United Kingdom, Australia |
Reviews
| Measure | Flash Sale Insights | RealtimeStack |
|---|---|---|
| App Store rating | Not published | 4.8 ★ |
| App Store reviews | Not published | 111 |
| New reviews, 28 days | Not enough data | 2 |
| Reviewers a year or more in | Not enough data | 31% |
Pricing
| Measure | Flash Sale Insights | RealtimeStack |
|---|---|---|
| Free plan | Not listed | Yes |
| Lowest paid monthly plan | $7.99/month(ahead) | $14/month |
| Longest free trial | 15 days | Not listed |
| Plans listed | 1 | 4 |
Listing
| Measure | Flash Sale Insights | RealtimeStack |
|---|---|---|
| Shopify category rank | #1471 | #16(ahead) |
| Shopify App Charts | Not on this week’s charts | #11 in Analytics |
| Built for Shopify | No | Yes |
| Launched | Mar 18, 2025 | Oct 24, 2022 |
| Languages | 1 | 11 |
| Developer | Grizzly & Poppy, LLC | Spritefish |
FAQ
Flash Sale Insights and RealtimeStack: common questions
- Is Flash Sale Insights or RealtimeStack cheaper?
- Only RealtimeStack lists a free plan. Paid plans start at $7.99/month for Flash Sale Insights and $14/month for RealtimeStack. Shoplist compares base prices only between monthly plans in the same currency; usage charges and annual plans vary, so check each plan’s limits.
- What features does each app list that the other doesn’t?
- RealtimeStack lists 16 the others don’t mention, such as Abandoned cart, Activity tracking, Benchmarking, Broken links. 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 Oct 13, 2026 for Flash Sale Insights, Nov 9, 2026 for RealtimeStack; 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 Oct 13, 2026 for Flash Sale Insights, Nov 9, 2026 for RealtimeStack. 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.