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CartHappy: Automatic Grocery Savings

Chrome extension by engineering · Lifestyle · Shopping

  • Established publisher

A Chrome extension in Lifestyle · Shopping with 1 000 users, a small but real audience. Audience over the last 30 days: +600.

Specific sites only: 12 match patterns.

What the developer says, and 5 screenshots

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

Users
1 000
Rating
5.0 (13 ratings)
Users, last 30 days
+600 (the store rounds this count to 1 000, so it moves only between steps)
Rating, last 30 days
Steady over 30 days
Version
1.8
Updated in the store
2026-10-22
Published
2026-05-04
Manifest
V3
Browser access
3 permissions, 12 site patterns

How it has moved

Users
+600 since 03.10
400-1k · 20 readings
2026-10-14: released 1.72026-10-22: released 1.8
  1. 2026-10-04430
  2. 2026-10-08496
  3. 2026-10-09507
  4. 2026-10-10548
  5. 2026-10-13594
  6. 2026-10-16681
  7. 2026-10-17716
  8. 2026-10-18744
  9. 2026-10-19759
  10. 2026-10-20789
  11. 2026-10-21808
  12. 2026-10-22822released 1.8
  13. 2026-10-23830
  14. 2026-10-24866
  15. 2026-10-25908
  16. 2026-10-28921
  17. 2026-10-29922
  18. 2026-10-30936
  19. 2026-11-011k
  20. 2026-11-021k
Rating
unchanged since 03.10
reviewsrating 5.00 · 20 readings
2026-10-14: released 1.72026-10-22: released 1.8
  1. 2026-10-04reviews13rating5.00
  2. 2026-10-08reviews13rating5.00
  3. 2026-10-09reviews13rating5.00
  4. 2026-10-10reviews13rating5.00
  5. 2026-10-13reviews13rating5.00
  6. 2026-10-16reviews13rating5.00
  7. 2026-10-17reviews13rating5.00
  8. 2026-10-18reviews13rating5.00
  9. 2026-10-19reviews13rating5.00
  10. 2026-10-20reviews13rating5.00
  11. 2026-10-21reviews13rating5.00
  12. 2026-10-22reviews13rating5.00released 1.8
  13. 2026-10-23reviews13rating5.00
  14. 2026-10-24reviews13rating5.00
  15. 2026-10-25reviews13rating5.00
  16. 2026-10-28reviews13rating5.00
  17. 2026-10-29reviews13rating5.00
  18. 2026-10-30reviews13rating5.00
  19. 2026-11-01reviews13rating5.00
  20. 2026-11-02reviews13rating5.00
Users
+756 since 01.09
242-1k · 34 readings
2026-09-06: released 1.42026-09-14: released 1.52026-09-30: released 1.62026-10-14: released 1.72026-10-22: released 1.8
  1. 2026-09-01244
  2. 2026-09-04247
  3. 2026-09-05242
  4. 2026-09-07243
  5. 2026-09-09259
  6. 2026-09-10321
  7. 2026-09-13350
  8. 2026-09-15357
  9. 2026-09-17388
  10. 2026-09-21397
  11. 2026-09-22408
  12. 2026-09-25406
  13. 2026-09-26398
  14. 2026-09-28400
  15. 2026-10-04430
  16. 2026-10-08496
  17. 2026-10-09507
  18. 2026-10-10548
  19. 2026-10-13594
  20. 2026-10-16681
  21. 2026-10-17716
  22. 2026-10-18744
  23. 2026-10-19759
  24. 2026-10-20789
  25. 2026-10-21808
  26. 2026-10-22822released 1.8
  27. 2026-10-23830
  28. 2026-10-24866
  29. 2026-10-25908
  30. 2026-10-28921
  31. 2026-10-29922
  32. 2026-10-30936
  33. 2026-11-011k
  34. 2026-11-021k
Rating
unchanged since 01.09
reviewsrating 5.00 · 34 readings
2026-09-06: released 1.42026-09-14: released 1.52026-09-30: released 1.62026-10-14: released 1.72026-10-22: released 1.8
  1. 2026-09-01reviews12rating5.00
  2. 2026-09-04reviews12rating5.00
  3. 2026-09-05reviews12rating5.00
  4. 2026-09-07reviews12rating5.00
  5. 2026-09-09reviews12rating5.00
  6. 2026-09-10reviews12rating5.00
  7. 2026-09-13reviews13rating5.00
  8. 2026-09-15reviews13rating5.00
  9. 2026-09-17reviews13rating5.00
  10. 2026-09-21reviews13rating5.00
  11. 2026-09-22reviews13rating5.00
  12. 2026-09-25reviews13rating5.00
  13. 2026-09-26reviews13rating5.00
  14. 2026-09-28reviews13rating5.00
  15. 2026-10-04reviews13rating5.00
  16. 2026-10-08reviews13rating5.00
  17. 2026-10-09reviews13rating5.00
  18. 2026-10-10reviews13rating5.00
  19. 2026-10-13reviews13rating5.00
  20. 2026-10-16reviews13rating5.00
  21. 2026-10-17reviews13rating5.00
  22. 2026-10-18reviews13rating5.00
  23. 2026-10-19reviews13rating5.00
  24. 2026-10-20reviews13rating5.00
  25. 2026-10-21reviews13rating5.00
  26. 2026-10-22reviews13rating5.00released 1.8
  27. 2026-10-23reviews13rating5.00
  28. 2026-10-24reviews13rating5.00
  29. 2026-10-25reviews13rating5.00
  30. 2026-10-28reviews13rating5.00
  31. 2026-10-29reviews13rating5.00
  32. 2026-10-30reviews13rating5.00
  33. 2026-11-01reviews13rating5.00
  34. 2026-11-02reviews13rating5.00

A dot marks a day the store showed a different number. Between them the line carries the last one forward: we read every listing up to 2 times a day and record a point only when something moves. History beyond ninety days is in the app.

What it can reach

Specific sites only: 12 match patterns.

  • https://auth.carthappy.com/*
  • https://www.carthappy.com/*
  • https://app.posthog.com/*
Show the remaining 9
  • https://login.kroger.com/*
  • https://www.target.com/*
  • https://www.kroger.com/*
  • https://www.fredmeyer.com/*
  • https://www.harristeeter.com/*
  • https://www.kingsoopers.com/*
  • https://www.safeway.com/*
  • https://www.walmart.com/*
  • https://www.aldi.us/*
  • Sign you in with a Google account identity
  • Run its own code on the pages it can access scripting
  • Store data in your browser storage

The full permission history for this extension

Version history

  1. Version 1.8
  2. Version 1.7
  3. Version 1.6
Show the remaining 2
  1. Version 1.5
  2. Version 1.4

What changed recently

  1. Released version 1.8 (was 1.7)
  2. Package size changed
  3. Released version 1.7 (was 1.6)
Show the remaining 8
  1. Store description rewritten
  2. Package size changed
  3. Store description rewritten (54 → 81 characters)
  4. Released version 1.6 (was 1.5)
  5. Store description rewritten
  6. Released version 1.5 (was 1.4)
  7. Package size changed
  8. Released version 1.4 (was 1.3)

The publisher

engineering. Listed website: carthappy.com.

Like this one

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

  1. American Grocery Shopper Describes nearly the same job, smaller audience 13 users
  2. RecipeCart Describes nearly the same job, smaller audience 3 users (last published figure)
  3. Lasso - Grocery Store Coupon Auto Clipper Describes nearly the same job, smaller audience 1k users ★ 5.0
  4. RecipeCart Describes nearly the same job, smaller audience 2 users (last published figure)
  5. BetterCart Describes nearly the same job, smaller audience 15 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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Users and rating on Ext Ops Panel

Markdown

[![Users and rating on Ext Ops Panel](https://extops.dev/extensions/fielnnbciidglffhngfekpdjfpdedoep/badge.svg)](https://extops.dev/extensions/fielnnbciidglffhngfekpdjfpdedoep)

HTML

<a href="https://extops.dev/extensions/fielnnbciidglffhngfekpdjfpdedoep"><img src="https://extops.dev/extensions/fielnnbciidglffhngfekpdjfpdedoep/badge.svg" alt="Users and rating on Ext Ops Panel" height="20"></a>

Figures come from our own regular passes over the public Chrome Web Store listing, last read on . The store last changed these figures on 2026-11-01. We publish no contact details for extension developers.

Where the data comes from: how the catalog is built