waifu2x8.0 - App Store

This app can scale and/or denoise images using various advanced on-device AI algorithms. Note that this app is not affiliated with the original waifu2x project.

Privacy is one of the top priorities of this app. Your files will never leave your device to be processed. Additionally, we don't collect any personal information because there are no ADs even if you only use free models. Therefore, if you encounter any problems, please send us a feedback email or create a GitHub issue so that we can work together to fix them.

Try additional models and custom models on your own images for free before you purchase!

Highlight features:
1. Unlimited number of imported images.
2. Supports both SRCNN and CUnet models from the original waifu2x project.
3. Supports Real-ESRGAN models for both illustrations and photos.
4. Supports Real-CUGAN models for anime illustrations. Also supports customizable intensity.
5. Supports Anime4K models for anime videos.
6. Supports custom Core ML models. Import any model to process images for your specific needs.
7. Custom scale modes. You have options to scale images up to 128x, 1.5x, fixed size and more.
8. Supports multiple ways of importing images: the album, files, folders, drag and drop, other apps, Shortcuts.
9. Supports images with alpha channel.
10. Multiple output formats: PNG, JPEG, HEIF, WebP.
11. Multiple processing backends. You can choose between highest quality or highest speed.
12. Write output images directly to an external path (including network drives like SMB).
13. End-to-end support for 16-bit color and color spaces. Color accuracy will not be compromised after processing.
14. Highly optimized RAM usage. You can easily produce images that don't even fit inside your device RAM.
15. Supports deleting or replacing original images if they come from the album.
16. Supports downscaling images before processing, which is useful while processing some photos.

Source code of core function is available on GitHub:
https://github.com/imxieyi/waifu2x-ios

Usage of images in screenshots is granted by the original author Kurumi:
https://twitter.com/0115_kurumi

The primary app icon is illustrated by Kapuru:
https://twitter.com/KaPuRu_0410

Version History Updated design for Liquid Glass. 8.0 Oct 6 Fixed the issue that the image picker is not scrollable while selecting images. 7.2.12 09/29/2025 Fixed the issue that importing images from other apps doesn't work on iOS/iPadOS 26. 7.2.11 09/18/2025 Added an option to automatically save output images to album. 7.2.7 04/22/2024 Fixed error while loading directories in some cases. 7.2.6 01/16/2024 Fixed the issue that downscale factor cannot be changed on iOS 17. 7.2.5 10/20/2023 1. Added an option to change output file name suffix (advanced mode).
2. Fixed several other minor issues. 7.2.4 08/21/2023 Fixed model loading failure under certain conditions. 7.2.3 07/24/2023 Fixed Real-CUGAN models on iOS/iPadOS ** (censored) beta. 7.2.2 06/24/2023 If a video contains unsupported contents, they will be ignored instead of failing the whole process. 7.2.1 06/07/2023 Added Anime4K models optimized for anime videos. It's included in Additional Models purchase. 7.2.0 05/22/2023 Fixed some slight UI issues. 7.1.5 04/27/2023 1. Fixed "Unknown" error while enabling "Force no scaling" under certain conditions.
2. Significantly improved UI performance after adding a large number of images (for example 3k+).
3. Fixed a few other problems. 7.1.4 04/11/2023 1. Fixed crash on iPads with Apple A9.
2. Fixed image picker on iOS 16.4.

Recent updates:
1. Added an option to show progress percentage while processing.
2. Further reduced likelihood of crashing while processing very large images. 7.1.3 04/08/2023 1. Added an option to show progress percentage while processing.
2. Further reduced likelihood of crashing while processing very large images. 7.1.2 04/07/2023 1. Fixed crash on Apple A9 devices (iPad 5th gen, iPad Pro 1st gen).
2. Other bug fixes and improvements. 7.1.1 03/20/2023 1. Added an option to force disable upscaling (aka "anti-aliasing" mode) on Real-ESRGAN, Real-CUGAN and custom models. You can now improve image or video quality without increasing resolution.
2. At least 90% crashes while processing large images should be prevented now (will fail gracefully instead).
3. Significantly improved PNG encoding speed. Processing is up to 1.75x faster when bottlenecked by PNG encoding.
4. Other minor bug fixes and improvements. 7.1 03/10/2023 Welcome to waifu2x 7.0, a major update in a long time.
1. Added support for custom models. Most of the features you already love are still available to custom models. That include GIF/video support, PNG/JPEG/HEIF/WebP output and much more! Note that a separate purchase for "Custom Models" is required to save output images/videos from custom models.
2. Enabled Univeral Purchase, which means you can unlock a paid feature on all your iOS/iPadOS and macOS devices with a single purchase. If you already purchased "Additional Models" separately on the same Apple ID, you will get "Custom Models" feature for free as a gift. 7.0 03/04/2023 Partially fixed crash while scaling tiny images. 6.2.8 02/12/2023 1. Added troubleshoot for restoring purchase after switching Apple ID.
2. Fixed out of memory error during video processing when preprocessing is enabled. 6.2.6 12/14/2022 Maybe fixed lost purchase on iOS 16. 6.2.5 10/28/2022 Fixed some minor bugs and improved stability. 6.2.1 04/09/2022 1. Added support for importing images from folders. Original directory structures are preserved if you specify the output directory.
2. Significantly improved performance of loading metadata and generating thumbnails. 6.2 04/05/2022 Fixed images not being able to be imported from some apps via share menu. 6.1.1 03/29/2022 1. Due to too many reviews complaining about video processing not working properly but nobody reports any issue through feedback, it's no longer recommended to process GIFs and videos on iOS.
2. Fixed wrong video dimensions when the video file is rotated. 6.0.2 03/16/2022