Comparison

Upscale 4x AI vs BlurStack

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Upscale 4x AI

This app uses AI to enhance low-resolution images, enlarging them up to 800% while restoring detail and clarity. It can improve portraits, landscapes, product photos, and even old or blurry pictures. Achieve high-definition results for professional, e-commerce, or personal use.

Highlights
  • AI-powered resolution enhancement
  • Up to 800% image enlargement
  • Face AI for portrait restoration
  • Noise removal and detail preservation
  • Restores old and cracked photos
  • Enhances anime images
Features
Read full description

Upscale 4x uses AI technology to restore low-resolution, poor-quality images, generating up to 800% enlarged high-definition restored images. Its core features include: -Resolution enhancement With Upscale 4x, you can enlarge an image and increase its resolution by 200%, 400%, or 800%. -Portrait restoration By introducing Face AI technology, even images with low-resolution faces of poor quality can be transformed into clear, realistic high-definition images. -Detail preservation We remove the noise in the image, retain the textures within the image, and enhance them in a way that looks realistic when the image is enlarged. Examples of usage scenarios: -For professional users.  Easily create the high-definition images you need from poor quality images, from portraits to landscapes, from product images to PPT illustrations. -For e-commerce.  Configure clearer images for products. -For personal users.  Enhance the quality of poor-quality images from social apps by 400%, transforming blurry character avatars into high-definition large images. Even old, cracked photos can be restored to high-definition new photos through image restoration. -For anime users.  Convert low-resolution anime images into high-quality anime without loss.

About

BlurStack

Features
Read full description

長時間曝光以前要腳架、要減光鏡、還要算快門。BlurStack 讓你跳過這些——你相簿裡的原況照片,本身就是一段幾秒鐘的連續影像,把它們疊起來,就是一張長曝光。 【怎麼用】 1. 從相簿選一張原況照片 2. 拖曳時間軸掐頭去尾,決定要用哪一段 3. 逐幀檢視,把手震、有路人亂入的畫面排除掉 4. 選擇合成模式,即時預覽 5. 儲存回相簿 【兩種合成模式】 - 平均 — 把所有影格取平均。適合流水、瀑布、雲、人潮:移動的東西化成柔順的絲狀,靜止的部分同時變得更乾淨、雜訊更少。 - 取亮 — 每個像素只保留最亮的一次。適合車燈軌跡、光繪、煙火、夜間光點:亮的軌跡會完整疊加保留,不會被暗部稀釋。 【接續內建長曝光,補上缺的那一段】 相簿內建的長曝光效果按一下就有,很方便,但它是全自動的:整段影片一律拿去平均,你不能挑範圍、不能剔除某一幀,也只有那一種疊法。於是常遇到—— - 想留車燈軌跡,光軌卻被大量沒有車經過的暗幀稀釋,成品又淡又灰 - 前半段還沒站穩、或最後手一抖,整張跟著糊,卻沒辦法只保留中間穩定的那一段 - 有路人剛好走過鏡頭,整張就報銷 - 只想要浪打上礁石的那 1.5 秒,它卻硬是把全部秒數都用上 BlurStack 把這些決定權交還給你: - 取亮模式 — 每個像素只保留最亮的一次,光軌、煙火、光繪完整疊加,不會被暗部拉灰 - 範圍選取 — 時間軸兩端自由裁切,只用你要的那一段 - 逐幀排除 — 手震、亂入、失焦的影格,點一下就踢掉 同一張原況照片,內建效果給你一個結果,BlurStack 給你一整組可能。 【為什麼用原況照片】 你不需要為了長曝光重新出門一趟。過去幾年拍下的原況照片全都是現成素材,翻一翻相簿,隨手一張夜景或溪流可能就藏著一張作品。 【逐幀控制,不是一鍵套用】 時間軸上每一幀都有縮圖。手震的、有人走過的、對焦跑掉的,點一下就排除,剩下的才會進入合成。你決定這張長曝光由哪些瞬間組成。 【隱私】 所有處理都在你的裝置上完成。BlurStack 不會上傳你的照片,不需要網路連線,也不收集任何個人資料。選取照片走系統選取器,不需要完整相簿讀取權限;App 只要求「加入照片」權限,用來把成品存回相簿。 【免費版與 BlurStack Pro】 免費版即可使用完整的時間軸編輯與兩種合成模式,限制為: - 每日 3 次合成 - 輸出長邊上限 2048 像素 - 輸出檔案不含原始拍攝資訊(EXIF) 升級 BlurStack Pro 解除限制: - 無限次合成 - 以原況照片的原生解析度輸出 - 保留原始拍攝資訊(EXIF) BlurStack Pro 為一次性買斷,非訂閱制,不會自動續訂,也不會定期扣款。購買後可在使用同一 Apple 帳號的裝置上以「恢復購買」取回。 【使用建議】 合成時不會自動對位影格,因此拍攝當下請盡量拿穩相機或靠著固定物,素材愈穩定,合成結果愈銳利。輸出畫布會放大到原況照片靜態幀的尺寸,實際清晰度仍取決於配對影片本身的解析度。 隱私權政策:https://gridfixapp.com/blurstack/policy/ 使用條款(Apple 標準 EULA):https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Upscale 4x AI3 screens
BlurStack4 screens

Verdict

The call

The clearest difference is iOS requirement: Upscale 4x AI at 14.0 against BlurStack's 17.0. On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Upscale 4x AI sells 1 one-off in-app purchase and BlurStack sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Scorecard1 real difference · 9 level
Upscale 4x AI versus BlurStack: the parameters behind the verdict, then further details
ParameterUpscale 4x AIBlurStack
PriceFreeFree
Rating4.4 (279 ratings) — better—
Positive reviews80.9% of reviews—
Number of ratings279 — better—
Update frequencyEvery 4 months—
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS14.0 — better17.0
Further details — not scored
Size523 MB1 MB
Age rating4+4+
Developer丽譞 牛PEI-CHUN CHAO

Bugs and requests

Upscale 4x AI

Reported bugs

2 issues
  • Incompatible with larger images
  • Upscaling not working for some images

Requested features

3 requests
  • Batch processing for multiple images
  • More control over upscaling
  • Option to choose save location

BlurStack

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Upscale 4x AI

One-time1
  • Pro Edition$3.99
1 purchases

BlurStack

One-time1
  • BlurStack Pro 終身版$5.99

Questions

Is Upscale 4x AI free?
Upscale 4x AI is free to download, with in-app purchases available.
Is BlurStack free?
BlurStack is free to download, with in-app purchases available.
Do Upscale 4x AI or BlurStack have ads?
Neither Upscale 4x AI nor BlurStack shows ads.

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