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Chrome extensionwhat they say

Add More Colors to Calendar

Enhance your Google Calendar with a Chrome extension that adds custom colors to each event for a personalized, organized schedule.

★★★☆☆3.4 (42) · 5k+ users
Free$3.33/moPremium
Website ↗ Chrome Web Store ↗
what mrrlens sees
MRR · Estimated$83–416
Opportunity—
Buyer threads · 30 d0
“I keep getting error code in red Type Error Failed to fetch.”
#1 complaint · Bugs/Reliability · 50% of complaints read · analysed Nov 2, 2026 · source

01Revenue

$83–416

A month · the formula and every input are below

How this range is computed

active users × paid conversion × monthly price

  • monthly price: $3
  • active users: 5,000
  • 0.5%–2.5% of active users pay

A range from public signals and the listed price, not a claim about the company’s books. Methodology.

Store data from the Chrome Web Store listing, refreshed daily. Updated 2 d ago.

02Why users leave Add More Colors to Calendar

Bugs/Reliability3 reviews · 50%

Users report red “Type Error Failed to fetch” errors; extension stopped working, and reinstall or relaunch did not fix it.

“I keep getting error code in red Type Error Failed to fetch.” source ↗
2 more complaints, with verbatim quotesIncluded in the day pass and Pro.
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Sample: 6 recent complaints (1–3★ reviews) · clustered Nov 2, 2026 · complaints from Feb 2025–Nov 2025, almost all in the last 24 months · each review labelled by a model, quotes verbatim

03How to build a better Add More Colors to Calendar

Build difficultyMediumGoogle Calendar DOM integration and Chrome Web Store approval; billing and cancellation add compliance if subscription.
Three build ideas that answer these complaintsIncluded in the day pass and Pro.
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04Who wants a better Add More Colors to Calendar

0 buyer threads in the last 30 days name Add More Colors to Calendar, and 4 more are in the same market.

05Questions about Add More Colors to Calendar

How much revenue does Add More Colors to Calendar make?

MRRLens estimates Add More Colors to Calendar at $83–416 a month (low confidence). The range comes from public signals (active users × paid conversion × monthly price), not from the company's books; the formula and its inputs are shown on this page.

What do users complain about most in Add More Colors to Calendar?

Across 6 recent complaints, the most common is bugs/reliability (50%). Users report red “Type Error Failed to fetch” errors; extension stopped working, and reinstall or relaunch did not fix it.

How many people use Add More Colors to Calendar?

Add More Colors to Calendar lists 5k+ users on the Chrome Web Store, rated 3.4 (42).

See the full x-ray of Add More Colors to Calendar

Full 1-star breakdown with verbatim quotes, the build blueprint and every live thread — on every product.