Comparison

Infinity Sketch vs ImgRef

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

Head to head
About

Infinity Sketch

Create precise schematics with a customizable grid and line editing system. Seamlessly integrate images as backgrounds or symbols to enhance your workflow. Enjoy a practically infinite canvas for unrestricted creativity, all offline and completely free.

Highlights
  • Customizable grid for precision
  • Image import for backgrounds/symbols
  • Practically infinite canvas
  • Offline functionality
  • Apple Pencil and finger drawing support
  • Combines freehand and grid lines
Features
Read full description

Infinity Sketch is the ultimate tool for fast grid based sketching of any kind, now enhanced with seamless image support. Built on top of Apple’s default drawing canvas, it introduces a powerful, fully customizable grid and line editing system, making it ideal for quickly sketching precise schematics. Easily paste images from your system pasteboard to use as backgrounds or symbols, boosting your creative workflow. It is completely free with no hidden charges, no in-app purchases, and no internet connection required. It works entirely offline, so you can sketch anytime, anywhere, without interruptions or freemium distractions. Whether you're using Apple Pencil on iPad or finger drawing on iPhone, Infinity Sketch adapts to your workflow, offering a modern, document-based interface that fits your needs. With its practically infinite canvas, you’ll never run out of space to create. What sets Infinity Sketch apart is its combination of hand-drawn symbols with straight, grid-based lines. This approach delivers clean, professional-looking results with an artistic touch, making your sketches both functional and visually appealing. Key Features: Fully customizable grid for precision sketching Seamless Apple Pencil integration on iPad Supports finger drawing on iPhone and iPad Huge canvas for unrestricted creativity Image support: Paste images from pasteboard as backgrounds or symbols for enhanced creativity Combines freehand symbols and grid-based lines for unique, artful results Pro Tip: Easily Annotate Screenshots Paste a screenshot from the pasteboard into Infinity Sketch using the Insert Image icon. Choose "Pin selected images to background" from the Rectangle Select menu to lock it for annotation. Unpin to edit again. Whether you're sketching circuit diagrams, flowcharts, or any other schematic, Infinity Sketch offers the tools to make your designs shine. Privacy Policy: https://www.circuitshepherd.com/privacy-policy-for-Infinity-Sketch.html

About

ImgRef

This app is an all-in-one creative tool for mood boards, reference images, and collaging. It offers smart asset management, precise color picking, and free-form layout capabilities across multiple devices. Designed for various creative professionals, it streamlines workflows with advanced editing and import/export features.

Highlights
  • Unlimited canvas with smart caching
  • Multi-select batch processing
  • Professional workflow with keyboard shortcuts
  • Image editing and adjustments
  • Dynamic color picker
  • Cross-platform support (iOS/macOS)
  • Video frame extraction
  • GIF decomposition
Features
Read full description

「App Store Editor's Choice」 「98% 5-Star Ratings」 「Cross-Platform for iPhone/iPad/MacOS」 Redefine your creative workflow - an all-in-one tool combining mood boards, reference images, smart asset management, precise color picking, and free-form collaging across devices. Designed for UI/brand/illustration/photography/architecture/video storyboard and other creative scenarios, this is your professional reference image and inspiration board on iPhone / iPad / macOS. Core Features: 1. Unlimited Canvas: Smart caching and image management for large long-term libraries and smooth browsing. 2. Multi-Select Batch Processing: Select multiple images for adaptive scaling, smart layout, uniform size, copy, and alignment. 3. Professional Workflow: Full keyboard shortcuts (Mac / iPad keyboard) for faster frequent actions. 4. Image Editing: Rotate, crop, desaturate, flip, adjust opacity, layers, scale, and more. 5. Dynamic Color Picker: Pick any canvas color in real time and get common color codes. 6. Video Processing: MP4 playback and 4K still extraction for faster storyboards, covers, and video references. 7. Stylized Text: Built-in fonts and styles make notes, titles, and labels clearer on the canvas. 8. Magnetic Guides: Alignment hints and smart snapping for precise layouts. 9. GIF Decomposition: Break animations into frames for clearer detail references. 10. Import Methods: Clipboard, photo library, folders, camera, drag & drop (iPad / Mac). 11. Export Methods: Scene export and image group export for sharing and delivery. 12. Web Drag & Drop: Drag images from Pinterest / ArtStation / Midjourney / Pixiv / Instagram and more. 13. Multiple Modes: View, lock, and edit modes keep browsing and editing separate. 14. Brush Tools: Annotate and highlight key areas for more intuitive communication. 15. File Management: Grid/list views with multiple sorting options. 16. Canvas Zoom: Smooth zoom and pan for comfortable detail viewing. 17. Multi-Select Quick Alignment: Quick alignment/distribution after multi-select. 18. Backup & Import: Full backup and package import for migration and recovery. Pro Enhancements: 1. Image/GIF/Video Notes: Add notes to capture ideas and key points. 2. Preview Mode: Switch to a clean preview for focused viewing and presentations. 3. Advanced Crop: Fit different aspect ratios and compositions faster for cleaner output. 4. Image Blur: Blur images for privacy protection and richer visual layering. 5. High-Resolution Scene Export (PNG): Export full scenes as HD PNG for sharing and delivery. 6. File Favorites: Save frequent files for quick access to key references. 7. Category Tags: Tag files by use, project, or status for faster filtering. 8. Dotted Background: Toggle a dotted background for clearer edge contrast. 9. Canvas Grayscale: Focus on tone and composition with grayscale view. 10. Image Color Analysis: Extract dominant colors to understand palette relationships. 11. Layer Panel: Preview names, reorder, and quick select for efficient layer management. 12. Scheduled Playback: Timed switching, playback controls, and countdown. 13. Layer Search: Filter by type and keyword to quickly locate target content among many layers. 14. Brush Presets: Switch stroke width, color, and opacity for annotation, highlighting, and sketching. 15. Canvas RGB Single-Channel Preview: View R/G/B channels separately to analyze color distribution, tone, and detail. 16. Link Cards: Turn webpages into cover cards pinned on the canvas; one tap to open You can subscribe to ImgRef Pro. Charged to your iTunes account on confirmation. Auto-renews unless canceled 24+ hours before period end. Manage in iTunes Store. Privacy Policy: https://xunhuaref.cn/index.php/privacypolicy/ Terms of Use: https://xunhuaref.cn/index.php/privacypolicy/eula-en/ Download now and experience the smoothest creative tool in the Apple ecosystem! Thank you for reading. Contact us: Email: imgref@163.com

Screenshots

Infinity Sketch4 screens
ImgRef4 screens

Verdict

The call

The clearest difference is rating: ImgRef at 4.7 against Infinity Sketch's 3.7. ImgRef also leads on update cadence (every 5 days vs every 3 weeks) and ratings volume (124 vs 15). Infinity Sketch's advantage is in-app purchases (none vs 2). On price, review sentiment, ads and monetization model 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. ImgRef sells 2 in-app purchases, starting at $0.99 per month. Infinity Sketch asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

ImgRef holds the better App Store score, 4.7 against 3.7. That said, the two scores are not equally well evidenced: ImgRef has 124 ratings behind it against 15, so its average is the more settled of the two. Written reviews point the same way: 75% of Infinity Sketch's written reviews are positive against 79% of ImgRef's.

UpkeepUpdate frequency

Infinity Sketch ships an update every 3 weeks, ImgRef every 5 days. The most recent releases landed on September 10, 2026 and September 21, 2026 respectively.

Scorecard6 real differences · 4 level
Infinity Sketch versus ImgRef: the parameters behind the verdict, then further details
ParameterInfinity SketchImgRef
PriceFreeFree
Rating3.7 (15 ratings)4.7 (124 ratings) — better
Positive reviews75.0% of reviews79.1% of reviews — better
Number of ratings15124 — better
Update frequencyEvery 3 weeksEvery 5 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFreeFree
DevicesiPhone, iPadiPhone, iPad, iPod, Mac — better
Requires iOS18.015.6 — better
Further details — not scored
Size18 MB76 MB
Age rating4+4+
DeveloperJosef Woess文荣 李

Customer experience

Infinity Sketch

All ratings15 ratings
Positive73.3%
Neutral0.0%
Negative26.7%
Written reviews12 reviews
Positive75.0%
Neutral0.0%
Negative25.0%

ImgRef

All ratings124 ratings
Positive91.9%
Neutral0.8%
Negative7.3%
Written reviews43 reviews
Positive79.1%
Neutral4.7%
Negative16.3%

Bugs and requests

Infinity Sketch

Not enough reviews yet to summarise bugs or requests.

ImgRef

Reported bugs

1 issue
  • Trouble importing images from other apps

Requested features

3 requests
  • Add cropping functionality
  • Implement doodle/text feature for notes
  • Add GIF frame reading function

In-app purchases

None

Infinity Sketch

No in-app purchases

2 purchases

ImgRef

Subscriptions2
  • pro_monthly$0.991 Month
  • ImgRef Annual Subscription$5.991 Year

Questions

Is Infinity Sketch free?
Infinity Sketch is free to download, with no in-app purchases.
Is ImgRef free?
ImgRef is free to download, with in-app purchases available.
Which has better reviews, Infinity Sketch or ImgRef?
ImgRef is rated higher. Infinity Sketch averages 3.7 out of 5 from 15 ratings, while ImgRef averages 4.7 from 124 ratings.
Do Infinity Sketch or ImgRef have ads?
Neither Infinity Sketch nor ImgRef shows ads.
Which is updated more often, Infinity Sketch or ImgRef?
Infinity Sketch ships an update every 3 weeks, and ImgRef every 5 days. Most recently, Infinity Sketch was updated on September 10, 2026 and ImgRef on September 21, 2026.

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