Comparison

Interactive Sketchbook vs ACO Viewer

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

Head to head
About

Interactive Sketchbook

Learn professional illustration techniques with interactive tutorials and digital sketching tools. Practice drawing alongside a professional artist or import your own photo references. This app offers a digital alternative to traditional sketchbooks with advanced features for artists.

Highlights
  • Interactive tutorials from professional illustrator
  • Import photo references for drawing
  • Three custom layers for sketching and detailing
  • Split view for side-by-side drawing and reference
  • Full-page tracing and full-screen drawing modes
  • Unlimited pages and undo/redo functionality
  • Portfolio to store and manage digital art
Read full description

Draw beautifully organic pencil illustrations using professional tutorials, or from photo reference! Practice advance techniques by drawing alongside portrait tutorials from acclaimed illustrator Matt Busch. Or sketch on your own with the option to import your own photo reference. •INNOVATIVE APPROACH• THE RIGHT TOOLS Three custom layers allow you to efficiently switch between the types of tools that are most useful. Draw loosely and plan your work in the "Sketch Layer". Enjoy precise control of line and value in the "Detail Layer" to make highlights and intricate details shine. Enjoy a unique "Tone Layer" that makes smooth shading easy and fun! Each layer's visibility can be toggled on and off. SIDE BY SIDE Whether using your own photo or a tutorial, split view allows you to use reference in a unique way, side by side. Pinch to zoom in on detail and both the drawing and reference stay perfectly in sync! Awesome for artists who want to draw from reference without being forced to trace. INTUITIVE FULL-PAGE MODE But when you do want to trace. . . -swipe the binder over to utilize the full page where you can use your reference as a guide to get proportions picture perfect. Or enjoy full-screen mode with the reference layer toggled off to focus on detail, and maximize the iPad’s work surface. ENDLESS REAL-ESTATE With Interactive Sketchbook, you’ll never run out of pages. And with an undo and redo function you can explore being more creative without ruining your drawing or wasting paper. Like a tangible paper sketchbook Interactive Sketchbook is portable and always ready when inspiration strikes. •MATT BUSCH TUTORIALS• LEARN FROM A PRO Have a professional illustrator as your personal tour guide! Matt Busch has been illustrating some of the hottest properties in movies, books, and comics for over 30 years! And now he’s your interactive instructor, sharing his secrets and teaching you the basics of sketching portraits. LOTS OF OPTIONS The application has 4 different interactive tutorials that guide you through the steps of creating great portraits. Follow along with Busch at your own pace across 11 visual steps and see every pencil stroke he makes. For more specific guidance, touch an area within a step to reveal Busch’s detailed tips. (Over 3 dozen detailed tips per tutorial!) •PORTFOLIO AND BEYOND• Store, view, edit and resume your drawings in the portfolio. A clean layout and professional presentation allows you to view all your sketches at a glance. Tap a thumbnail to view your latest creations up close. And now, with the new "Animate Sketch" feature, you can watch your drawings redraw themselves step by step! All your sketches are automatically saved and stored in the portfolio. And you can always continue any sketch from where you last left off! •APPLE PENCIL SUPPORT• Take your sketching even further by connecting an Apple Pencil or Logitech Crayon. All styluses support palm rejection to prevent stray marks while resting a hand on the screen during drawing. Also enjoy pressure sensitive strokes for better control of your line work and shading with supporting styluses. Treat yourself to Interactive Sketchbook now, or surprise a friend and “Gift this App”. Whether you are an occasional doodler or a professional illustrator, Interactive Sketchbook is a must-have tool for your iPad and iPhone!

About

ACO Viewer

Features
Read full description

AC Viewer is a part of the global platform that will enable mass adoption of AR compatible devices, including smart glasses by Apple, Google, and Microsoft. The Augmented.City platform developed by an Italian technology startup consists of three key solutions – a free SDK for developers, AR software, and mobile apps for scanning surrounding objects and demonstrating augmented reality. AC Viewer is exactly the application responsible for the demonstrating part. As soon as a smartphone is pointed on a real object, additional information from augmented reality will be displayed in the mapped city. For now the tourists and the inhabitants of the following cities can use the application: Bari(South Italy) – the whole city St.Petersburg some parts of the city center), Amsterdam ( the Dam Square). The application shows the following information on top of the buildings in real time: Viewing 3D models; Historical facts about tourist attractions; Construction plans.

Screenshots

Interactive Sketchbook4 screens
ACO Viewer4 screens

Verdict

The call

The clearest difference is price: ACO Viewer at Free against Interactive Sketchbook's $4.99. ACO Viewer also leads on in-app purchases (none vs 1) and iOS requirement (12.0 vs 17.6). On update cadence, 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

ACO Viewer is free to download; Interactive Sketchbook costs $4.99 up front. Interactive Sketchbook sells 1 one-off in-app purchase. ACO Viewer asks for nothing beyond the download.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 4 months. The most recent releases landed on October 11, 2026 and October 2, 2026 respectively.

Scorecard3 real differences · 7 level
Interactive Sketchbook versus ACO Viewer: the parameters behind the verdict, then further details
ParameterInteractive SketchbookACO Viewer
Price$4.99Free — better
Rating5.0 (2 ratings) — better—
Positive reviews42.0% of reviews—
Number of ratings2 — better—
Update frequencyEvery 4 monthsEvery 4 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.612.0 — better
Further details — not scored
Size345 MB100 MB
Age rating4+4+
DeveloperDigital Wave CreativeAUGMENTED CITY SRL

In-app purchases

1 purchases

Interactive Sketchbook

One-time1
  • Paper Pack Pro$3.99
None

ACO Viewer

No in-app purchases

Questions

Is Interactive Sketchbook free?
Interactive Sketchbook costs $4.99, and also offers in-app purchases.
Is ACO Viewer free?
ACO Viewer is free to download, with no in-app purchases.
Do Interactive Sketchbook or ACO Viewer have ads?
Neither Interactive Sketchbook nor ACO Viewer shows ads.
Which is updated more often, Interactive Sketchbook or ACO Viewer?
Interactive Sketchbook ships an update every 4 months, and ACO Viewer every 4 months. Most recently, Interactive Sketchbook was updated on October 11, 2026 and ACO Viewer on October 2, 2026.

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