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waifu2x

waifu2x

Enhance Image & Video Quality

934 ratings
230 reviews
📷 Photo & Video
🎨 Graphics & Design
Free
In-App Purchases

Details

  • Released
  • Updated
  • September 19, 2017
  • September 29, 2025

Features

Developer

宜 谢
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waifu2x screenshot #1 for iPhone
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iphone
ipad
🧾$0.99 - $8.99
In-App Purchase↘︎
📌Ready
Reviews summary↘︎
⭐230
Reviews↘︎
📝4+ tags
Tags↘︎
🔄6+ apps
Alternatives↘︎
❓5 answered
FAQ↘︎
📦w/o updates
Updates frequency↘︎
🖼️Get Icon
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About

Enhance image and video quality using on-device AI algorithms for scaling and denoising. This app prioritizes privacy by processing files locally and offers various advanced models and custom options for detailed control over your media.

✓AI-powered scaling and denoising
✓Supports multiple AI models (SRCNN, CUnet, Real-ESRGAN, Real-CUGAN, Anime4K)
✓Customizable AI models and scale modes
✓Unlimited image imports
✓Multiple import and output formats
✓On-device processing for privacy
Show original description

What users say

Summarized from real user reviews of waifu2x. Based on 934 reviews and a 4.8/5 average, it highlights the 6 positives and 4 negatives reviewers mention most about this Graphics & Design app.

Positive things

  • 👍Fantastic app
  • 🚀Quick upscaling
  • 💡Convenient one-time purchase
  • 👍Clean and intuitive interface
  • 👍Excellent quality results
  • 👍Stable and reliable performance

Negative things

  • 💰Paid models required for best results
  • ⏱️Slow processing speed for some users
  • 🐛Occasional crashes or issues with newer devices
  • 💰Perceived as 'greedy' by some users for paid features
See all reviews

What's New in waifu2x

7.2.12

September 29, 2025

Fixed the issue that the image picker is not scrollable while selecting images.

6

In-App Purchases

$0.99

Tip

Give a tip to the developer

User reviews

Most RecentHighest RatedLowest Rated

BEST POSSIBLE IPHONE QUALITY!!!!

Honestly I am very impressed! I have been using this for about 2 years and honestly I have never used a better quality upscale. It’s like 8k but on mobile devices. I am so thankful for this app.
Gjstarrr123Gjstarrr123

まとめて高画質化できるのは素晴らしい！

高画質化したい画像が大量にある時に、一遍にまとめて高画質化できるのは最高です。
他の画質向上アプリでは一遍に高画質化はできません。
広告が無いのも素晴らしい限りです。
いずれ有料プランに課金してみようと思います。
まっきー提督まっきー提督

❤️

OMGMGMGMG ITS THE BEST APP EVER THANK YOU
AminalikeschipsAminalikeschips

すごく良い！

画質が悪かったりする画像を加工して即座に解像度も良くて良いものにしてくれて無料なのがとても素晴らしい！今の所良い点しか無い！
紅呪13紅呪13

前はweb版をつかってましたが

アプリになっていたのですね。
2倍に拡大するのにあっという間でした。きれいだし
すごい。
nacchi-sannacchi-san
See 225 more reviews

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User experience

🐞

Reported Bugs

2 issues

Difficulty downloading or accessing paid models

Bug

Inconsistent performance on certain devices

Bug
✨

Requested Features

4 requests

Add more upscaling models

Feature

Improve processing speed and efficiency

Feature

Provide more customization options

Feature

Add support for video upscaling

Feature

FAQ

What does this app do?

This app uses advanced on-device AI algorithms to scale and denoise images and videos. It allows you to enhance the quality of your media, making them sharper and clearer.

What are the key features of this app?

Key features include support for various AI models like SRCNN, CUnet, Real-ESRGAN, Real-CUGAN, and Anime4K, unlimited image imports, custom scale modes, and on-device processing for enhanced privacy. It also supports multiple import and output formats.

How much does this app cost?

The app is free to use with the option to purchase additional models and custom features. You can try additional models and custom models on your own images for free before making a purchase.

Is this app compatible with my device?

While specific OS version requirements are not detailed, the app is designed for mobile devices and utilizes on-device processing. It supports various import methods like album, files, folders, and drag and drop, suggesting broad compatibility.

What are common use cases for this app?

Common use cases include enhancing old or low-resolution images, improving the quality of anime illustrations and photos, upscaling images for better detail, and denoising videos to remove grain or noise.