Sukemaru: Verified Cutout PNG

No ads, full size, real alpha

$1.00 · Designed for iPad. Not verified for macOS.

"Removed the background, but the file is still white." Usually the file is fine — that is how Photos previews transparency. Sukemaru measures the alpha for you. You removed the background — but the saved file still looks white. Most of the time the transparency is fine. What went wrong is the file format, or simply how the Photos app previews transparent pixels. Sukemaru decodes the file it just wrote and measures the alpha channel, so you can tell the difference immediately. ■ Alpha Check — proof, not a promise Sukemaru analyzes the exported PNG and reports whether an alpha channel exists, what percentage of pixels are fully transparent, and what the real file format is. A strict mode reads the asset back from your photo library after saving, so you can confirm before handing the file to another app. ■ Full-Size Lock — no quality loss Your image is exported as a lossless PNG at exactly the pixel dimensions you imported. No downscaling, no re-encoding. The original pixel count stays visible on screen. ■ A loupe that shows what your finger covers While erasing, the area hidden under your fingertip appears in a magnified window, with the brush footprint overlaid, so you can chase edges like hair and fabric precisely. Zoom up to 12×. ■ One-tap automatic cutout On-device vision detects the subject and clears the background. Anything it misses can be fixed with the eraser and restore brushes. ■ Three export routes · Save to Photos (stores the PNG bytes as-is) · Export to the Files app · Hand the file directly to another app Sukemaru ranks them by how reliably transparency survives. ■ Paid once. No ads, no nagging. There are no in-app purchases, no advertising, and no review prompts. Everything is available from the moment you download it. ■ Nothing leaves your device Cutout and verification run entirely on device. Your photos are never uploaded. Good for · Product photos for resale listings and online shops · Cutting people or products into slides and documents · Building sticker and icon artwork · Working out why transparency disappeared after handing a file to another app Available in English, German, Korean, Traditional Chinese, and Japanese. Requires iOS 17 or later.

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Improved how the app can be found on the App Store. No changes to the app itself.

Version 1.1.2

The developer, Daisuke Yamaguchi, 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 Not Collected

    The developer does not collect any data from this app.

    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
    • Daisuke Yamaguchi
    Size
    • 1.6 MB
    Category
    • Photo & Video
    Compatibility
    Requires iOS 17.0 or later.
    • iPhone
      Requires iOS 17.0 or later.
    • iPad
      Requires iPadOS 17.0 or later.
    • Mac
      Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
    Languages
    English and 4 more
    • English, German, Japanese, Korean, Traditional Chinese
    Age Rating
    4+
    Copyright
    • © 2026 Sauna Inc.
  • Developer Website
  • Privacy Policy

    • Supports

    • Family Sharing

      Up to six family members can use this app with Family Sharing enabled.

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