MARLVEL
Classic Solitaire: Calm Cards icon
Jigslip icon
Spider Solitaire：Stamps Travel icon

CO AND EF

For adults seeking casual, single-player mental stimulation and relaxation through classic puzzle and card game formats.

Known forJigslip
3apps4.8(1.5K)Games

Snapshot

Who is CO AND EF?

Providing accessible, ad-light card and puzzle games for adults seeking mental stimulation and relaxation. Focused on delivering classic gameplay experiences with clean, distraction-free interfaces.

Target audience

Adults seeking casualSingle-player mental stimulationRelaxation through classic puzzle

Rivals analysis in progress

Portfolio

Free 3
3
apps
Games3

Last updated

Jigslip

v1.0.8

7mo ago

Active

Publisher DNA

What defines CO AND EF?

Publisher DNA

Primary focus

Casual card and puzzle games

Scale

indie

Target audience

Adults seeking casual, single-player mental stimulation and relaxation through classic puzzle and card game formats.

Signature Patterns

  • •Focus on classic, single-player puzzle and card mechanics.
  • •Emphasis on distraction-free, ad-light user experiences.
  • •Visual style centered on high-definition, clean, and relaxing aesthetics.
  • •Freemium and free-to-play monetization models.
Active

Portfolio momentum

Released 7 updates across 2 apps in the last 6 months, with both titles receiving consistent maintenance and updates.

Last release 7d agoActive apps 2

Company profile

low confidence
Headquarters
Hong Kong

Portfolio

What does CO AND EF ship?

Apps

3 apps analysed

Classic Solitaire: Calm Cards icon
Classic Solitaire: Calm Cards
4.9(71)
View Intel →

Analysis in progress

Jigslip icon
Jigslip
4.9(1.4K)
View Intel →
Spider Solitaire：Stamps Travel icon
Spider Solitaire：Stamps Travel

spider solitaire card game 2025

4.5(87)
View Intel →

Single-market publisher, every app ships only to United States.

Based on 1 of 3 apps with localized market data, more coverage rolling in as scans complete · last scanned .

Americas (1)

  • United States1 / 1

Core markets (1/1 apps)

United States

The Analyst's Read

The bottom line on CO AND EF

Bottom line

This publisher is a focused, indie-scale studio that successfully competes in the crowded puzzle category by prioritizing user experience over aggressive ad monetization. Their high ratings suggest strong product-market fit among casual users who value a clean, meditative gaming environment.

Frequently asked questions

How many apps does CO AND EF publish?
CO AND EF has 3 apps tracked by Marlvel, primarily in the Games category.
Where is CO AND EF based?
CO AND EF is based in Hong Kong.
What kind of apps does CO AND EF make?
CO AND EF's portfolio is concentrated in Games, with an average rating of 4.8/5 across rated apps.
What is CO AND EF's top app?
By review volume across the portfolio, Jigslip is CO AND EF's best-known app tracked by Marlvel.
In how many countries are CO AND EF's apps available?
Marlvel has tracked CO AND EF's apps across 1 country.

What fed this analysis

Apps analyzed:
2
With full intel:
0
With overview:
2
Website scraped:
yes
Social presence:
no

Disclosure: Independent intel to help mobile builders succeed.

AI-powered analysis with automated quality gates, built from publicly available sources. Marlvel.ai is not affiliated with, endorsed by, or sponsored by CO AND EF, its developer, the app publisher, Apple, or Google Play. All trademarks, logos, and screenshots referenced remain the property of their respective owners.

Cite this report

Marlvel.ai. “CO AND EF intelligence.” Updated 2026-05-08. https://marlvel.ai/publishers/co-and-ef-limited

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Data licensed under CC-BY-NC 4.0