Comparison

KeyFilter vs SharpUpscale

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

Head to head
About

KeyFilter

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Upscale photos to a maximum resolution of 8192 x 8192. Directions ---------- 1. Tap the + button on the top right navigation bar to import a file 2. Select a photo to edit by tapping the photo thumbnail in the application 3. Tap the Save button on the top right navigation bar 4. Choose the output resolution

About

SharpUpscale

Enhance and restore your photos with advanced AI. Upscale images to 16K, sharpen blurry pictures, and bring old memories back to life, all processed privately on your device.

Highlights
  • AI upscaling up to 16K
  • Blur and noise removal
  • Old photo restoration
  • Smart face enhancement
  • On-device processing
  • Works offline
Features
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Turn any photo into a stunning high-resolution masterpiece in seconds. SharpUpscale uses advanced AI to upscale images up to 8K and 16K, sharpen blurry photos, restore old damaged pictures, and bring incredible clarity to your shots - all processed privately on your iPhone or Mac. Why users love SharpUpscale: • Powerful AI Upscaling - Increase resolution 2×, 4× or 8× while preserving natural details. Perfect for turning low-quality photos into crisp 4K, 8K and even 16K images. • Blur & Noise Removal - Fix blurry, pixelated, and compressed photos with one tap. • Old Photo Restoration - Breathe new life into faded, scratched, or damaged family photos. • Multiple Quality Modes - Choose Standard for speed, Enhanced for balanced results, or Ultra for maximum sharpness and detail. • Smart Face Enhancement - Automatically improves faces, eyes, and skin texture. • Transparency Support - Works perfectly with PNG images that have alpha channel. • On-Device Processing - Your photos never leave your device. Fast, secure, and fully private. Perfect for: • Photographers who need quick 4K/8K/16K upscaling • Restoring old family albums and vintage photos • Enhancing social media images and product shots • Upscaling game screenshots, AI art, and illustrations • Making blurry phone photos look professional Works completely offline - no internet required for core features SharpUpscale combines the best of modern AI super-resolution models with a clean, intuitive interface designed for iOS and macOS. Whether you want to enlarge a small photo without losing quality, restore precious memories, or prepare images for large prints - SharpUpscale delivers professional results instantly. Subscription Terms: Payment charged to iTunes Account. Auto-renews unless disabled 24 hours before period ends. Manage in Account Settings. https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy - All processing happens locally on your device. No data is sent to servers. Your photos stay completely private. Download SharpUpscale today and see the difference AI upscaling can make. Turn good photos into extraordinary ones.

Screenshots

KeyFilter4 screens
SharpUpscale4 screens

Verdict

The call

The clearest difference is price: SharpUpscale at Free against KeyFilter's $0.99. SharpUpscale also leads on update cadence (every 2 weeks vs every 6 months). KeyFilter's advantage is in-app purchases (none vs 3) and iOS requirement (13.0 vs 17.0). On ads 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

SharpUpscale is free to download; KeyFilter costs $0.99 up front. SharpUpscale sells 3 in-app purchases, starting at $4.99 per month. KeyFilter asks for nothing beyond the download.

UpkeepUpdate frequency

KeyFilter ships an update every 6 months, SharpUpscale every 2 weeks. The most recent releases landed on October 4, 2026 and October 18, 2026 respectively.

Scorecard4 real differences · 6 level
KeyFilter versus SharpUpscale: the parameters behind the verdict, then further details
ParameterKeyFilterSharpUpscale
Price$0.99Free — better
Rating—5.0 (3 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—3 — better
Update frequencyEvery 6 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad, Mac
Requires iOS13.0 — better17.0
Further details — not scored
Size2 MB138 MB
Age rating4+4+
DeveloperMichael NewellIgor Bidenko

In-app purchases

None

KeyFilter

No in-app purchases

3 purchases

SharpUpscale

Subscriptions2
  • SharpUpscale$4.991 Month
  • SharpUpscale3 Days trial$19.991 Year
One-time1
  • SharpUpscale$29.99

Questions

Is KeyFilter free?
KeyFilter costs $0.99, with no in-app purchases.
Is SharpUpscale free?
SharpUpscale is free to download, with in-app purchases available.
Do KeyFilter or SharpUpscale have ads?
Neither KeyFilter nor SharpUpscale shows ads.
Which is updated more often, KeyFilter or SharpUpscale?
KeyFilter ships an update every 6 months, and SharpUpscale every 2 weeks. Most recently, KeyFilter was updated on October 4, 2026 and SharpUpscale on October 18, 2026.

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