Keenly: Spot the Color

How sharp is your eye?

Free · In‑App Purchases · Designed for iPad. Not verified for macOS.

One puzzle a day, the same for the whole world. Find the shade no one else can see. How sharp is your eye? Keenly is a daily test of perception. Every day the whole world gets the same puzzle: a grid of color tiles where exactly one is a slightly different shade. Find it. Each round the difference shrinks — down to the very edge of human vision (ΔE ≈ 1.0, the just-noticeable-difference). Your result is an acuity score and a global percentile: how fine a difference your eye can actually resolve. Share your spoiler-free grid, keep your streak, and see if you've got an Eagle Eye. • One run a day — same puzzle worldwide • 7 escalating rounds, scored on the finest difference you can detect • Global percentile + ranks, from Warming Up to Eagle Eye • Daily streak, history, and your acuity trend over time • Spoiler-free share grid — compare with friends • Color-blind (CVD) mode — leans on lightness so everyone can play • Premium, editorial design. No clutter, no candy. Keenly+ unlocks unlimited Practice, Hard & Master modes, four color themes (including dark), full history, and removes all ads — one payment, forever.

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The developer, Hasegi Inc., indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Used to Track You

    The following data may be used to track you across apps and websites owned by other companies:

    • Location
    • Identifiers
    • Usage Data

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Location
    • Identifiers
    • Usage Data
    • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Seller
  • Hasegi Inc.
Size
  • 26.8 MB
Category
  • Puzzle
Compatibility
Requires iOS 13.0 or later.
  • iPhone
    Requires iOS 13.0 or later.
  • iPad
    Requires iPadOS 13.0 or later.
  • iPod touch
    Requires iOS 13.0 or later.
  • Mac
    Requires macOS 11.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
Languages
  • English
Age Rating
4+
In-App Purchases
Yes
Copyright
  • © 2026 Hasegi Inc.
  • Developer Website
  • Privacy Policy

    • More by Hasegi Inc.

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