# Sukemaru: Verified Cutout PNG — No ads, full size, real alpha > Verifies and preserves transparency in PNG files with lossless, full-size exports. (iPhone/iPad app by Daisuke Yamaguchi.) - Source: https://appshunter.io/ios/app/sukemaru-verified-cutout-png/id6796656589 (this page in markdown: same URL + `.md`) - Developer: [Daisuke Yamaguchi](https://appshunter.io/developer/880950899) - Category: Photo & Video, Utilities - Price: $1.00 - Age rating: 4+ - Requires: iOS 17.0 · 2 MB - Languages: American English, German (Germany), Japanese, Korean, Chinese (Traditional, Taiwan) - Released: 2026-08-05 - Data updated: 2026-09-14 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/sukemaru-verified-cutout-png/id6796656589/reviews.md ## What is Sukemaru? 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. ## Key features - Alpha channel verification - Full-size lossless PNG export - Magnified editing loupe - One-tap automatic cutout - Multiple export options - On-device processing ## Recent user reviews (2 of 2) All indexed reviews: https://appshunter.io/ios/app/sukemaru-verified-cutout-png/id6796656589/reviews.md ### 5/5 — 背景透過がここまで簡単とは *2026-08-07* 背景透過が必要なときにすごく便利でした。PNG画像の確認も簡単で、SNS用の画像やサムネイル作成で重宝しています。操作がシンプルなので、画像編集に慣れていない人でもすぐ使えると思います。 ### 5/5 — すげー！ *2026-08-07* 端末上で免許証とか提出する時、使ってます。撮った写真選ぶと、速攻で不要な背景消してくれる。 結構ごちゃごちゃした写真も一発だから、便利。 ## Frequently asked questions about Sukemaru ### What is Sukemaru's main purpose? Sukemaru's main purpose is to verify and preserve the transparency of PNG files after you've removed a background. It helps ensure that the transparency you expect is actually present in the saved file, preventing common issues where transparent areas appear white. ### Does Sukemaru have ads? No, Sukemaru is ad-free. The app explicitly states there are no advertisements, no in-app purchases, and no review prompts, offering a clean user experience. ### How does Sukemaru handle image quality? Sukemaru exports your images as lossless PNGs at their original pixel dimensions. This means there is no downscaling or re-encoding, preserving the full quality and pixel count of your original image. ### Is Sukemaru available on Android? Based on the provided information, Sukemaru requires iOS 17 or later and is available on iPhone and iPad. There is no mention of Android availability. ### How often is Sukemaru updated? Sukemaru was last updated on August 9, 2026, with version 1.1.2. This indicates a recent update, suggesting ongoing development and support. ### What languages does Sukemaru support? Sukemaru is available in English, German, Korean, Traditional Chinese, and Japanese. This broad language support makes it accessible to a global user base. ### Can I use Sukemaru offline? Yes, Sukemaru processes cutouts and verification entirely on your device. This means all operations run locally, and your photos are never uploaded, allowing for offline use. ### What is the price of Sukemaru? Sukemaru is a paid app priced at $1.00. The app states it is 'Paid once. No ads, no nagging,' meaning this is a one-time purchase for full access. ## Version history (last 5 releases) ### 1.3 — 2026-09-02 • You can now place the cutout on a background when exporting: keep it transparent, or use white, black, or a photo of your own. The background is never distorted — it is scaled to the shorter side and centred. • When you export transparent, the app still reads the file back and measures the alpha, as before. ### 1.2 — 2026-08-27 • Added "Our other apps" in Settings, so you can see what else we make. The App Store opens inside the app, so you never lose your place. ### 1.1.2 — 2026-08-09 Improved how the app can be found on the App Store. No changes to the app itself. ### 1.1.1 — 2026-08-08 Bug fixes. · Fixed the editing bar pushing its buttons off screen at large text sizes, which made Clear brush strokes unreachable · Fixed export history not recording anything when “Check alpha automatically before export” was turned off · Fixed transparency being reported as unconfirmed on images where transparent and opaque pixels alternate every pixel, such as hair or mesh. Large images are now counted without skipping, so the percentages are exact · Fixed the preview briefly reverting to an earlier state while erasing continuously · Made scrolling the export history lighter ### 1.1 — 2026-08-07 Sukemaru now speaks English, German, Korean, and Traditional Chinese. · The interface follows your device language · The photo permission prompts are localized too · Nothing about the processing changed — cutout and alpha checking still run entirely on your device Feedback and bug reports are welcome. ## More apps by Daisuke Yamaguchi - [チャット分析 for LINE](https://appshunter.io/ios/app/for-line/id880950896) - [ぱすてるオセロ](https://appshunter.io/ios/app/id6793739141) - [起業おじさん](https://appshunter.io/ios/app/id6795361615) - [禁酒ウォッチ｜断酒・節酒カウンター](https://appshunter.io/ios/app/id6795822272) - [Tsuzuku: Habit Tracker & ToDo](https://appshunter.io/ios/app/tsuzuku-habit-tracker-and-todo/id6796174701) - [Solo Invoice: Quote & Receipt](https://appshunter.io/ios/app/solo-invoice-quote-and-receipt/id6796195340) All apps by Daisuke Yamaguchi: https://appshunter.io/developer/880950899 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-14.*