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GumFee - Fee Calculator for Creators & Sellers

Chrome extension by NexGen Devs · Productivity · Tools

A Chrome extension in Productivity · Tools with 17 users, barely installed.

No site access is declared in the manifest, so it cannot read the pages you open on its own.

What the developer says, and 1 screenshot

Loading from the Chrome Web Store. Open the listing if it does not appear.

Users
17
Rating
not rated yet
Users, last 16 days
+1
Version
1.0
Updated in the store
2025-02-27
Published
2025-02-27
Manifest
V3
Browser access
1 permission

How it has moved

Users
+1 since 01.09
16-18 · 7 readings
  1. 2026-09-0116
  2. 2026-09-0218
  3. 2026-09-0616
  4. 2026-09-0718
  5. 2026-09-0816
  6. 2026-09-1017
  7. 2026-09-1617
Users
+1 since 01.09
16-18 · 7 readings
  1. 2026-09-0116
  2. 2026-09-0218
  3. 2026-09-0616
  4. 2026-09-0718
  5. 2026-09-0816
  6. 2026-09-1017
  7. 2026-09-1617

A dot marks a day the store showed a different number. Between them the line carries the last one forward: we read every listing more than once a day and record a point only when something moves. History beyond ninety days is in the app.

What it can reach

No site access is declared in the manifest, so it cannot read the pages you open on its own.

  • Store data in your browser storage

The full permission history for this extension

What changed recently

Nothing has moved on this listing since we started watching it.

The publisher

NexGen Devs publishes 8 listings we track, 360 users between them.

  1. TeleSave - Telegram Media Downloader & Saver NexGen Devs · Productivity · Tools · published 2025-02-11 155 users
  2. QuickSave - Image Format Converter NexGen Devs · Productivity · Workflow · published 2025-02-04 102 users ★ 5.0
  3. Pinterest Analytics & Tools - Pinzly NexGen Devs · Productivity · Workflow · published 2026-01-03 33 users ★ 5.0
Show 4 more from this publisher
  1. Clipto - Copy Prompts to AI Images in One Click NexGen Devs · Productivity · Developer · published 2025-02-26 27 users
  2. Feeflex NexGen Devs · Productivity · Developer · published 2024-11-05 10 users ★ 5.0
  3. Huntlox - Roblox Analytics & Revenue Estimator NexGen Devs · Productivity · Workflow · published 2026-08-11 9 users ★ 5.0
  4. TabMaster Pro - Tab Manager & Organizer NexGen Devs · Productivity · Workflow · published 2025-02-12 7 users

Like this one

Listings the catalog judges closest in what they say they do.

  1. FeeCalc — Seller Fee Calculator Describes nearly the same job, smaller audience 5 users ★ 5.0
  2. Payment Fee Calculator Describes nearly the same job, smaller audience 4 users (last published figure) ★ 5.0
  3. Just Sell - Seller Fee & Payout Calculator Describes nearly the same job, smaller audience 2 users
  4. Reseller Profit Calculator Describes nearly the same job, smaller audience 4 users
  5. Calculadora de Custos Marketplace Describes nearly the same job, smaller audience 48 users ★ 5.0

The top 5 only. The full comparison, with why each one is close, is on the alternatives page; ranking a whole neighbourhood by your own criteria is in the app.

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Figures come from our own daily pass over the public Chrome Web Store listing, last read on . We publish no contact details for extension developers.