Comparison

Head Model Studio vs Kolaj

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

This app provides 3D reference models for artists to study and draw faces. It offers detailed control over lighting and rendering to help users understand facial planes and tones, aiding in portrait drawing practice.

Highlights
  • 25 detailed 3D head models
  • Full 3D model control (zoom, tilt, rotate)
  • Realistic environmental and studio lighting
  • Customizable rendering with edge outlines
  • Pre-made practice scenes
  • Study facial planes and geometry
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

Kolaj

Features
Read full description

Transform your photos into stunning collages with the power of AI background removal and intuitive touch controls. Kolaj is the modern collage maker that combines powerful image editing with an effortless creative experience. Whether you're designing a mood board, creating a photo montage, or crafting the perfect social media post, Kolaj gives you professional results in minutes. Key Features AI-Powered Background Removal • Remove backgrounds instantly with on-device machine learning • No cloud uploads - all processing happens privately on your device • Automatic cropping to eliminate transparent edges • Perfect cutouts for seamless compositing Intuitive Canvas Controls • Drag, rotate, and scale images with natural touch gestures • Layer up to 20 photos on a single canvas • Visual corner handles for precise resizing • Smart touch detection - only interact with visible parts of images Advanced Layer Management • Tap to move layers forward or backward one step • Long-press to instantly bring to front or send to back • Visual selection indicators show which layer is active • Haptic feedback for intuitive interaction Creative Customization • Add custom-colored borders that follow your cutout shapes • Choose from preset colors or create your own with the color picker • Customize canvas backgrounds with solid colors or transparent backgrounds • Borders automatically adapt to light or dark backgrounds Share & Export • Export high-resolution images at your device's native quality • Share directly to Messages, Instagram, Photos, and more • Exports preserve your light/dark mode preference • Perfect quality for social media or printing Perfect For • Social media content creators • Scrapbooking and memory keeping • Mood boards and vision boards • Product mockups and presentations • Creative photo projects • Birthday cards and invitations • Marketing materials • Digital art and design Privacy First All background removal and image processing happens on your device using Apple's Vision framework. Your photos never leave your phone, and no internet connection is required for editing. Modern Design • Beautiful glass-effect buttons with modern iOS styling • Full-screen immersive editing experience • Automatic light and dark mode support • Smooth animations and haptic feedback • Clean, distraction-free interface Performance • Lightning-fast on-device processing • Supports images from your entire photo library • Real-time gesture recognition and manipulation • Optimized for all iPhone models How It Works 1. Select - Pick up to 20 photos from your library 2. Edit - Backgrounds are automatically removed and images are ready to arrange 3. Design - Drag, rotate, resize, and layer your photos on the canvas 4. Customize - Add colorful borders and choose your background 5. Share - Export and share your masterpiece anywhere Start creating beautiful collages today with Kolaj!

Screenshots

Head Model Studio4 screens
Kolaj4 screens

Verdict

The call

The clearest difference is in-app purchases: Kolaj at none against Head Model Studio's 4. Head Model Studio's advantage is iOS requirement (16.4 vs 26.0). On price, 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. Head Model Studio sells 4 in-app purchases, starting at $9.00 per month. Kolaj asks for nothing beyond the download.

Scorecard2 real differences · 8 level
Head Model Studio versus Kolaj: the parameters behind the verdict, then further details
ParameterHead Model StudioKolaj
PriceFreeFree
Rating4.6 (2.5K ratings) — better—
Positive reviews76.5% of reviews—
Number of ratings2.5K — better—
Update frequencyMonthly—
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad — betteriPhone
Requires iOS16.4 — better26.0
Further details — not scored
Size2.2 GB3 MB
Age rating4+4+
DeveloperWes CastainThis or That 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

Kolaj

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
None

Kolaj

No in-app purchases

Questions

Is Head Model Studio free?
Head Model Studio is free to download, with in-app purchases available.
Is Kolaj free?
Kolaj is free to download, with no in-app purchases.
Do Head Model Studio or Kolaj have ads?
Neither Head Model Studio nor Kolaj shows ads.

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