Comparison

Head Model Studio vs ka

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

Head to head
About

Head Model Studio

Master portrait drawing with detailed 3D head models. Study facial planes and geometry with customizable lighting and rendering options. Perfect for artists looking to elevate their sketching skills.

Highlights
  • Detailed 3D head models
  • Plane and geometry study
  • Customizable lighting (environmental & studio)
  • Adjustable rendering (edge outline, shininess)
  • Pre-made practice scenes
  • Zoom, tilt, and rotate controls
Features
Read full description

Draw better portraits with Head Model Studio. Study faces in detail from simple planes to complex geometry. It is the best iOS / iPadOS application to learn and study faces in detail. Take your sketches to the next level. INSPIRED BY FAMOUS TECHNIQUES Inspired by master methodologies, Head Model Studio comes with 25 different models, including 2 free. From simple to more detailed models, progress easily by understanding the planes of the face. Expand your practice with 5 classical models. COMPLETE CONTROL You have complete control over the 3D models. Zoom, tilt, and rotate to study each part of the model at will. ENVIRONMENTAL & STUDIO LIGHTING Realistic environmental lighting based on HDR photos, recreate a sunrise, midday, or sunset illumination. Switch to Studio Lighting to create amazing lighting composition with multiple spotlights and different colors. Change the lighting to be at any angle or intensity. Perfect to study the planes of the head and understand tones. CUSTOMISABLE RENDERING The edge outline highlights the planes for easier practice. Turn it off once comfortable and practice in a more realistic setting. Modify the shininess for a different material rendering. PRE-MADE PRACTICE Want to learn to draw but unsure where or how to start? We’ve created a bunch of scenes to get you started. PRICING Head Model Studio offers a couple of free models. A premium access is required to access the rest of the models. Lifetime and Yearly (non-recurring) options are available. WE LOVE FEEDBACK I love coding and drawing, feel free to reach out, and tell me what feature you'd love to see in the app. Terms & Conditions: https://headmodelstudio.com/terms-conditions/

About

ka

Features
Read full description

Kaka is a social card editor for creators who want to turn long-form text into polished visual posts. Paste an article, note, product point, or rough idea, and Kaka can help you break it into focused drafts, refine the copy, and export one editable card for sharing. Key features: - Use AI to break long articles into short card-ready drafts - Edit body text, quotes, titles, dates, and creator identity - Configure DeepSeek, MiniMax, or the built-in default model quota, with token usage records - Choose from card templates including Bento, Minimal, Editorial, Stacked Text, and Neubrutalism - Customize backgrounds, color themes, typography, spacing, layout, footer, QR code, and watermark - Preview common publishing ratios such as 1:1, 2:3, 3:4, 4:5, 9:16, wallpaper, and Story - Preview the real export canvas and save 2K, 4K, or lossless images to Photos - Keep a local record album of generated cards so you can revisit and continue editing - Store cards and configuration locally, ideal for private notes and draft ideas Kaka Pro unlocks more flexible high-resolution exports, watermark removal, custom icon upload, and future template and background updates. Turn long-form content into one clear, shareable idea, then polish it into a card people can understand at a glance. Automatic subscription information Payment will be charged to your Apple Account at confirmation of purchase. Subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours before the end of the current period. You can manage or cancel subscriptions in your Apple Account settings. Any unused portion of a free trial, if offered, will be forfeited when you purchase a subscription. Terms: https://privacy.amaz.studio/terms.html Privacy Policy: https://privacy.amaz.studio

Screenshots

Head Model Studio4 screens
ka4 screens

Verdict

The call

The clearest difference is update cadence: ka at weekly against Head Model Studio's monthly. 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. Head Model Studio sells 4 in-app purchases, starting at $9.00 per month and ka sells 3 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Head Model Studio ships an update monthly, ka weekly. The most recent releases landed on October 30, 2026 and October 28, 2026 respectively.

Scorecard1 real difference · 9 level
Head Model Studio versus ka: the parameters behind the verdict, then further details
ParameterHead Model Studioka
PriceFreeFree
Rating4.6 (2.5K ratings) — better—
Positive reviews76.4% of reviews—
Number of ratings2.5K — better—
Update frequencyMonthlyWeekly — better
AdsNoNo
In-app purchasesYesYes
MonetizationFreemium—
DevicesiPhone, iPadiPhone, iPad
Requires iOS16.4 — better17.0
Further details — not scored
Size2.2 GB157 MB
Age rating4+4+
DeveloperWes CastainAmazing LLC

Bugs and requests

Head Model Studio

Reported bugs

2 issues
  • Sudden loss of model functionality after updates
  • Overheating issues on some devices

Requested features

4 requests
  • Add female Loomis head models
  • Expand customization options for paid users
  • Implement full-body reference models
  • Provide option for one-time lifetime purchase

ka

Not enough reviews yet to summarise bugs or requests.

In-app purchases

4 purchases

Head Model Studio

Subscriptions2
  • 1 Month Access$9.001 Month
  • 1 Year Access$16.001 Year
One-time2
  • 1 Year Access$23.00
  • Lifetime Access$50.00
3 purchases

ka

Subscriptions2
  • Monthly$0.991 Month
  • Yearly3 Days trial$3.991 Year
One-time1
  • Lifetime$8.99

Questions

Is Head Model Studio free?
Head Model Studio is free to download, with in-app purchases available.
Is ka free?
ka is free to download, with in-app purchases available.
Do Head Model Studio or ka have ads?
Neither Head Model Studio nor ka shows ads.
Which is updated more often, Head Model Studio or ka?
Head Model Studio ships an update monthly, and ka weekly. Most recently, Head Model Studio was updated on October 30, 2026 and ka on October 28, 2026.

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