Workflow & Planning
See what inventory is really available on Amazon — by seller, by region, by day.
Compare extensions
Workflow & Planning
Spy how many products remain on any Amazon Product’s offer listing page. Check your competitor’s stock!
Audience & ratings
Store users
10K
7K
Ratings
What stands out
How Many? – Amazon Inventory Checker reports the larger audience. These are store counts. The rating difference is 0.13 points across 56 and 33 ratings.
Category overlap does not establish that two products serve the same workflow.
Product & publisher
Publisher
how many extension
RebelSoftwareLLC
Publisher portfolio
1 listing
1 listing
Listing status
Active
Active
Manifest
Version 3
Version 3
Package size
925KiB
34.87KiB
Permissions & access
Requested capabilities describe access, not developer intent or a safety verdict.
API permissions
3 requested
- webRequest
- activeTab
- storage
3 requested
- storage
- activeTab
- scripting
Website patterns
15 recorded
- *://app.howmanyextension.com/*
- https://api-v2.howmanyextension.com/*
- https://*.amazon.com/*
- https://*.amazon.co.uk/*
- https://*.amazon.es/*
- https://*.amazon.nl/*
- https://*.amazon.com.mx/*
- https://*.amazon.it/*
- https://*.amazon.in/*
- https://*.amazon.de/*
- https://*.amazon.fr/*
- https://*.amazon.cn/*
- https://*.amazon.ca/*
- https://*.amazon.com.br/*
- https://*.amazon.com.au/*
None recorded
Releases
Explore the release history
Create an account to compare versions and update timing. Your plan controls history depth.
Create your free accountEvidence behind this comparison
Both listings observed 2 Oct 2026.
Store users and ratings are observations, not revenue or lifetime installs. A larger audience or a higher score does not establish product quality.
How Earlygap collects evidenceReplace an extension
Your comparison
2 of 2 selected
How Many? – Amazon Inventory CheckerWorkflow & Planning
Check Competitor Stock Levels - Inventory SpyWorkflow & Planning