Comparison

Head Model Studio vs Tattoo Inkprep

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

Tattoo Inkprep

Features
Read full description

Inkprep requires an Inkprep Pro subscription to use the app. It offers a monthly and a yearly plan with auto-renewal. You can cancel anytime from your Apple ID settings. Inkprep is the booth tool for tattoo artists who work in color. You upload the clean digital design, choose the ink brand you work with and your client's skin tone. Inkprep returns the exact palette: which bottles you need and, when no single bottle matches, which mix to make and in what ratio. HOW IT WORKS 1. Upload the clean design (PNG, JPG or WEBP). 2. Choose your ink brand and the skin tone. 3. Get the color recipe in seconds. WHAT'S INCLUDED · 1,105 bottles from 6 brands: Eternal Ink, Intenze, Dermaglo, World Famous, Radiant and Solid Ink. · Recommended bottle for every color in the design. · Suggested mixes at 70/30, 50/50 and 30/70 ratios when there's no direct match. · Color loupe: zoom into any area of the design and see the assigned ink. · My Inks: save your real inventory and prioritize what you already have in the studio. · Browsable catalog with filters by brand, color family and search. · Project history and favorites. · Optimized for tablet: design on the left, recipe on the right. NOT GENERATIVE AI Color matching is deterministic and traceable: LAB color space and Delta E distance over each brand's real catalog. The same colors always give the same result. Nothing is made up. WHO IT'S FOR For tattoo artists who tattoo in color and want to stop improvising the palette by eye in front of the client. You prep the session before you start. SUBSCRIPTION Inkprep Pro unlocks unlimited analyses. Monthly or yearly subscription, auto-renewing. Cancel anytime from your Apple ID settings. Privacy Policy: https://inkprep.app/privacy/ Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Head Model Studio4 screens
Tattoo Inkprep4 screens

Verdict

The call

The clearest difference is update cadence: Tattoo Inkprep at every 5 days against Head Model Studio's monthly. Tattoo Inkprep also leads on iOS requirement (13.0 vs 16.4). 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 Tattoo Inkprep sells 2 in-app purchases, starting at $11.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Head Model Studio ships an update monthly, Tattoo Inkprep every 5 days. The most recent releases landed on October 18, 2026 and October 8, 2026 respectively.

Scorecard2 real differences · 8 level
Head Model Studio versus Tattoo Inkprep: the parameters behind the verdict, then further details
ParameterHead Model StudioTattoo Inkprep
PriceFreeFree
Rating4.6 (2.4K ratings) — better—
Positive reviews76.5% of reviews—
Number of ratings2.4K — better—
Update frequencyMonthlyEvery 5 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.413.0 — better
Further details — not scored
Size2.2 GB69 MB
Age rating4+4+
DeveloperWes CastainGuillermo Andujar

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

Tattoo Inkprep

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
2 purchases

Tattoo Inkprep

Subscriptions2
  • Inkprep Pro3 Days trial$11.991 Month
  • Inkprep Pro3 Days trial$89.991 Year

Questions

Is Head Model Studio free?
Head Model Studio is free to download, with in-app purchases available.
Is Tattoo Inkprep free?
Tattoo Inkprep is free to download, with in-app purchases available.
Do Head Model Studio or Tattoo Inkprep have ads?
Neither Head Model Studio nor Tattoo Inkprep shows ads.
Which is updated more often, Head Model Studio or Tattoo Inkprep?
Head Model Studio ships an update monthly, and Tattoo Inkprep every 5 days. Most recently, Head Model Studio was updated on October 18, 2026 and Tattoo Inkprep on October 8, 2026.

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