Comparison

h2Dr vs Zolly

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

Head to head
About

h2Dr

This app enhances a drawing book by linking printed pages to online video tutorials. Readers can use their devices to access over 10 hours of advanced video content, keeping the educational material current with rapidly advancing techniques.

Highlights
  • AR trigger image integration
  • Direct link to online tutorials
  • Over 10 hours of video content
  • Updates with advancing techniques
  • Companion app for a physical book
Read full description

This is the companion app for the new Design Studio Press book: How to Draw. Enhancing the learning experience, this app has been created to allow readers to use trigger images on pages to link directly to online tutorials via their iPhones and iPads. Using advanced video techniques, this app connects the printed matter to online digital educational content as never before, and insures that the book remains as current as the rapidly advancing techniques presented in How to Draw. Over 10 hours of video content have been created to accompany the book. A physical copy of How to Draw is required to get the most out of the h2Dr app. Additionally, an internet connection is required to view the video content. You can get your copy of the How to Draw book by visiting: http://designstudiopress.com For downloadable examples of the Trackers and for a demo video, please visit: http://scottrobertsonworkshops.com/h2dr/trackers/ Our Privacy Policy can be viewed in-app or at: https://designstudiopress.com/policies/privacy-policy/

About

Zolly

Learn perspective drawing by manipulating virtual models and cameras. Explore extreme contrasts and viewpoints to understand how position and proximity affect object appearance in art.

Highlights
  • View ready-made perspective models
  • Control virtual camera for unique views
  • Use grid lines and ground planes
  • Experiment with primitive and complex forms
  • Turn edges and lines on/off
  • Practice with Dolly Zoom effect
Read full description

If you want to learn perspective drawing and you’re willing to break some rules, then you need to check out ZOLLY! One of the most effective ways to draw with dynamic perspective is to play with its extremes… close and far contrasts can make your images exciting. The main purpose of this app is to heighten your awareness that position and proximity makes all the difference in how objects appear. Zolly Key Features: View tons of ready-made models to tackle both basic and advanced perspective challenges. Take total control of the camera to get the exact view and perspective distortion you’re looking for. Use grid lines, ground planes, and low-poly models to help you understand perspective. Primitive models that ease you into more complex forms, with edges and lines that can be turned on and off to better understand the underlying perspective. A perfect tool to go with the Proko Perspective course. Why ZOLLY? There's a technique in film called a Dolly Zoom (ZOLLY) where you can zoom in while moving the camera back which keeps an object the same size. It’s a trip and it's been used in movies like Jaws and Vertigo to make iconic moments. This app also allows you to play with the same mind-bending effect to see how position and proximity change everything! And the fun part? You can even experiment with other viewpoints and effects that you couldn’t pull off with a physical camera using ZOLLY. Zolly was designed to help you practice various forms in perspective, from simple and advanced primitive shapes, to more complex objects like vehicles and buildings. Draw from orthographic view, to extreme views, to anything in between. Manipulate forms in space with surprising viewpoints through a virtual camera, to expand your imagination, and prompt you to use perspective daringly as you play with form and space in your drawings.The goal for many artists is to push past the predictable and into the impossible. Stretch space. Stretch your mind. And yeah, stretch your art with ZOLLY.

Screenshots

h2Dr4 screens
Zolly4 screens

Verdict

The call

The clearest difference is review sentiment: Zolly at 100% against h2Dr's 37%. Zolly also leads on rating (5.0 vs 3.6). h2Dr's advantage is in-app purchases (none vs 6) and update cadence (every 4 months vs every 22 months). On price, ratings volume, 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

Both are free to download. Zolly sells 6 one-off in-app purchases. h2Dr asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Zolly holds the better App Store score, 5.0 against 3.6. Both are backed by a comparable volume of ratings — 9 and 17 respectively. Written reviews point the same way: 37% of h2Dr's written reviews are positive against 100% of Zolly's.

UpkeepUpdate frequency

h2Dr ships an update every 4 months, Zolly every 22 months. The most recent releases landed on November 1, 2026 and November 8, 2026 respectively.

Scorecard5 real differences · 5 level
h2Dr versus Zolly: the parameters behind the verdict, then further details
Parameterh2DrZolly
PriceFreeFree
Rating3.6 (9 ratings)5.0 (17 ratings) — better
Positive reviews37.1% of reviews100.0% of reviews — better
Number of ratings917 — better
Update frequencyEvery 4 months — betterEvery 22 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Mac — better
Requires iOS15.015.0
Further details — not scored
Size147 MB503 MB
Age rating4+4+
DeveloperDesign Studio PressProko

Customer experience

h2Dr

All ratings9 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews89 reviews
Positive37.1%
Neutral10.1%
Negative52.8%

Zolly

All ratings17 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews12 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

h2Dr

Reported bugs

18 issues
  • No sound in videos
  • App freezes or crashes
  • Camera not activating or black screen
  • Page recognition issues
  • Videos not playing
Show 13 more
  • App not working on newer iOS versions
  • Tracker not recognized
  • On-screen controls not working
  • Black camera bug
  • Camera freezes under iPad iOS 12.1.1
  • App crashes every time it's opened
  • Blank screen on startup
  • Cannot access camera with proper settings
  • App crashes and has random problems
  • Videos don't play when play buttons are pressed
  • Videos look ready to play but don't
  • App stopped working after iOS update
  • Augmented reality 3d models are vibrating and jittery

Requested features

4 requests
  • Add Japanese subtitles
  • Provide a simple menu for videos
  • Update for newer iOS versions
  • Fix bugs and improve stability

Zolly

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

h2Dr

No in-app purchases

6 purchases

Zolly

One-time6
  • XYZ Forms$1.99
  • Vehicle Pack$4.99
  • Buildings Pack$4.99
Show 3 more
  • Home Props Pack$4.99
  • Work Props Pack$4.99
  • All Packs Bundle$7.99

Questions

Is h2Dr free?
h2Dr is free to download, with no in-app purchases.
Is Zolly free?
Zolly is free to download, with in-app purchases available.
Which has better reviews, h2Dr or Zolly?
Zolly is rated higher. h2Dr averages 3.6 out of 5 from 9 ratings, while Zolly averages 5.0 from 17 ratings.
Do h2Dr or Zolly have ads?
Neither h2Dr nor Zolly shows ads.
Which is updated more often, h2Dr or Zolly?
h2Dr ships an update every 4 months, and Zolly every 22 months. Most recently, h2Dr was updated on November 1, 2026 and Zolly on November 8, 2026.

Other comparisons