PopUp ‑ Sell by Weight Shopify App: Pricing, Features & First-Adopter Watch
Key signals for PopUp
PopUp ‑ Sell by Weight launched on May 27, 2026. Shoplist is watching for its first storefront installs and tracking pricing in the meantime. Checked .
Sonar hasn’t detected PopUp ‑ Sell by Weight on a store yet. Watching since its May 27, 2026 launch.
PopUp on the Shopify App Store
Shoplist reads PopUp’s App Store listing every day: where it ranks, what merchants say, what it charges and every edit it ships.
Where Shopify ranks PopUp
Shoplist reads Shopify’s full category listings every day, so a climb or a slip shows up the day it happens.
| Day | Selling in person - Other | Selling in person |
|---|---|---|
| Sep 3, 2026 | #40 | #318 |
| Sep 4, 2026 | #40 | #307 |
| Sep 5, 2026 | #40 | #305 |
| Sep 6, 2026 | #40 | #314 |
| Sep 7, 2026 | #40 | #316 |
| Sep 8, 2026 | #40 | — |
| Sep 9, 2026 | #41 | #298 |
| Sep 10, 2026 | #40 | #317 |
| Sep 11, 2026 | #40 | #285 |
| Sep 12, 2026 | #40 | #297 |
| Sep 13, 2026 | #31 | #294 |
| Sep 14, 2026 | #31 | #296 |
| Sep 15, 2026 | #31 | #297 |
| Sep 17, 2026 | #32 | #301 |
| Sep 19, 2026 | #32 | #282 |
| Sep 20, 2026 | #36 | #274 |
| Sep 21, 2026 | #27 | #273 |
| Sep 22, 2026 | #27 | #283 |
| Sep 23, 2026 | #27 | #282 |
| Sep 24, 2026 | #27 | #284 |
| Sep 25, 2026 | #26 | #282 |
| Sep 26, 2026 | #26 | #282 |
| Sep 27, 2026 | #26 | #279 |
| Sep 28, 2026 | #26 | #283 |
| Sep 29, 2026 | #25 | #277 |
| Sep 30, 2026 | #28 | #281 |
| Oct 1, 2026 | #28 | #279 |
| Oct 2, 2026 | #28 | #282 |
| Oct 3, 2026 | #27 | #278 |
| Oct 4, 2026 | #27 | #285 |
| Oct 5, 2026 | #26 | #288 |
| Oct 6, 2026 | #26 | #288 |
| Oct 7, 2026 | #27 | #278 |
| Oct 8, 2026 | #26 | #284 |
| Oct 9, 2026 | #26 | #284 |
| Oct 10, 2026 | #26 | #281 |
| Oct 11, 2026 | #25 | #285 |
| Oct 12, 2026 | #24 | #278 |
| Oct 13, 2026 | #24 | #286 |
| Oct 14, 2026 | #24 | #289 |
| Oct 15, 2026 | #23 | #276 |
| Oct 16, 2026 | #23 | #262 |
| Oct 17, 2026 | #23 | #273 |
| Oct 18, 2026 | #22 | #262 |
| Oct 19, 2026 | #22 | #273 |
| Oct 20, 2026 | #22 | #266 |
| Oct 21, 2026 | #22 | #268 |
| Oct 22, 2026 | #22 | — |
| Oct 23, 2026 | #24 | #268 |
| Oct 24, 2026 | #24 | #262 |
| Oct 25, 2026 | #29 | #263 |
| Oct 31, 2026 | #29 | #260 |
| Nov 1, 2026 | #29 | #260 |
| Nov 2, 2026 | #28 | #257 |
| Nov 4, 2026 | #28 | #264 |
| Nov 5, 2026 | #28 | #255 |
| Nov 6, 2026 | #24 | #259 |
| Nov 7, 2026 | #23 | #252 |
| Nov 8, 2026 | #23 | #258 |
| Nov 9, 2026 | #23 | #261 |
What PopUp charges
Free plan available. Every plan on its listing, and every price change Shoplist has caught, so you can see exactly how it packages and prices.
Free
Free
Season-Pass
$4.99/month
Annual
$30/year
How PopUp sells itself on the App Store
The pitch, integrations and features merchants see before they install: the positioning a competitor is betting on.
“Weight-based selling for market vendors, simple separate catalog - pause when the season ends.”
What it does
Shopify POS can't sell by weight. So like most market vendors, I ran two systems — Square for in-person, Shopify for everything else. Two catalogs, two logins, manual reconciliation every tax quarter. I built PopUp because I needed it. PopUp adds weight-based… Shopify POS can't sell by weight. So like most market vendors, I ran two systems — Square for in-person, Shopify for everything else. Two catalogs, two logins, manual reconciliation every tax quarter. I built PopUp because I needed it. PopUp adds weight-based selling to Shopify POS. Mix weight and flat-price items in the same cart. On-device catalog, no Shopify inventory needed, works offline. Pause between seasons, no data lost.
Screenshots
PopUp listing facts
- Developer
- Mad Valley Productions
- Launched
- May 27, 2026
- Shopify rank
- #23 in Selling in person - Other#261 in Selling in person
- Languages
- English, French
Shopify stores using PopUp
Shoplist is watching Shopify storefronts for the first public install of PopUp.
How PopUp’s install base is moving
Shoplist re-crawls the same storefronts, so every store that adds PopUp, comes back to it or removes it shows up here. The store count also grows when Shoplist finds stores already running it; the breakdown keeps those apart from real installs.
Stores, last 28 days
0
0 now · 0 28 days earlier
Reach
0%
of the stores Shoplist tracks
Big-brand share
Not enough data: fewer than 150 of its stores have a known size
Where PopUp’s store count change came from
- Real installs and removalsEstimated0 added · 0 came back · 0 removed
- 0
Stores adding and removing PopUp, by week
| Week of | Added or back | Removed | Net | Notes |
|---|---|---|---|---|
| Aug 31, 2026 | 0 | 0 | 0 | Estimated |
| Sep 7, 2026 | 0 | 0 | 0 | Estimated |
| Sep 14, 2026 | 0 | 0 | 0 | Estimated |
| Sep 21, 2026 | 0 | 0 | 0 | Estimated |
| Sep 28, 2026 | 0 | 0 | 0 | Estimated |
| Oct 5, 2026 | 0 | 0 | 0 | Estimated |
| Oct 12, 2026 | 0 | 0 | 0 | Estimated |
| Oct 19, 2026 | 0 | 0 | 0 | Estimated |
| Oct 26, 2026 | 0 | 0 | 0 | Estimated |
| Nov 2, 2026 | 0 | 0 | 0 | 2 held-out days |
Compare PopUp
The apps in its App Store category, with the stores Shoplist detects on each and their listing ratings.
Alternatives to PopUp
Apps merchants weigh against PopUp ‑ Sell by Weight, with their own detected stores and ratings.
PopUp vs Filljoy Sell by Weight for POS
PopUp vs Measura
PopUp vs Price Embedded Barcode Scanner
PopUp vs POS Variable Priced Products
PopUp vs Point of Sale
PopUp vs F: POS Sell by Weight
Follow the apps you compete with and decide which changes deserve action. See the competitor-monitoring workflow.
Seen on the storefront, not guessed
If Shoplist shows PopUp on a store, it’s there. Every count on this page traces to code found on a live storefront, re-checked on every crawl.
Code-level
Found in the storefront’s own code
Shoplist matches the scripts, app blocks and pixels PopUp loads on each live storefront. No surveys, no developer-reported numbers, no model guessing installs from review counts.
Re-checked, so the count stays current
Shoplist keeps crawling the same storefronts. A store that uninstalls PopUp leaves the count on the next crawl, so you read today’s install base, not a high-water mark.
Daily
The App Store, read every day
Rank, reviews, pricing and every listing edit are captured daily, so a price change or a ranking slip shows up here the day it ships.
Two public sources, labelled on every section. Store data last checked .
Read the full methodologyQuestions about PopUp
Straight answers from the same data as the rest of this page. The full store list answers the rest.
Has Shoplist detected stores using PopUp ‑ Sell by Weight yet?
Shoplist has not yet found reliable public storefront evidence for PopUp ‑ Sell by Weight. The page tracks first merchant evidence as it appears.
What does first-adopter watch mean?
It means Shoplist is monitoring launch context, first storefront-detectable merchant evidence, and pricing.
Can I get alerts when stores start using PopUp ‑ Sell by Weight?
Yes. Create a watchlist to get alerted when Shoplist finds public merchant evidence for PopUp ‑ Sell by Weight.
Go beyond PopUp
Its closest rival, its developer and the charts it competes on, from the same data.
- PopUp vs Filljoy Sell by Weight for POSDetected stores, store movement, ratings and pricing side by side.
- Mad Valley ProductionsEvery app Mad Valley Productions publishes, with their detected reach.
- Top apps by categoryThe ten apps gaining the most detected installs in each category.
- All Shopify appsBrowse every app Shoplist tracks, by category, rating, and reach.
Keep watching PopUp.
Get alerted on first storefront installs, review spikes, pricing changes, and listing edits.
