Comparison

Percolator vs Value Study

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

Head to head
About

Percolator

Easily turn your photos into vibrant, multicolor mosaics with unique artistic styles. Intuitive controls allow for creative editing, and you can save or share your creations across various social platforms and messaging apps.

Highlights
  • Create multicolor photo mosaics
  • Unique artistic 'Brews'
  • Intuitive dial-based controls
  • Save and share to social media
  • Integrates with other photo apps
Features
Read full description

Transform your photos into dazzling, multicolor mosaics. FEATURES: • Create delightful mosaics from your photos • Amazing Brews, each with their own unique look • Intuitive dial-based controls • Save to your phone or share via Instagram, Facebook, Bluesky, Mastodon, Message, Email, and more • Try it with other photo editing apps — mix-n-match! WHAT PEOPLE ARE SAYING ABOUT PERCOLATOR: • “Delightfully quirky” —NY Times • 4½ out of 5 Mice: “The animated effects throughout the app are truly impressive...” —Macworld • “The result—something like a Seurat painting rendered with Microsoft Paint’s circle tool—is unique in the app world.” —Wired App Guide • “Percolator…is a unique, well-done modernist app with a fun retro wink.” —Life In LoFi KEEP UP WITH TINROCKET: • Follow @Tinrocket on Instagram for the latest! • We’re here to help: If you have a question or need assistance, you can always email us at support@tinrocket.com • If you like Percolator, please consider leaving an App Store review or rating—we’d really appreciate it! Every review counts and helps indie developers like ourselves. :) Happy Percolating!

About

Value Study

This app helps artists improve their skills by analyzing light and shadow in reference images. It allows users to break down tones step-by-step, from simple black and white to more complex value ranges, aiding in the understanding of depth and form. It's a tool to enhance traditional art studies.

Highlights
  • Step-by-step tone breakdown
  • Highlighting areas of same value
  • Focus on light, shadow, and form
  • Greyscale value studies
  • Works with reference images
Features
Read full description

In art, value (or tone) refers to how light or dark a colour is. If you're learning to paint or draw, doing value studies is one of the best ways to improve. These small, loose sketches in greyscale help you understand where shadows fall and highlights appear—essential for capturing depth and form. Value Study is a simple, focused tool designed to help you see values more clearly in your reference images. Instead of just converting a photo to black and white, this app lets you break down tones step by step. Start with just black and white to map out the biggest shapes, then gradually add more values to refine your understanding. You can also highlight all areas of an image that share the same value, making it easier to see subtle shifts in tone. This is especially useful in complex references, like portraits, where different parts of the image might have the same level of shadow but look completely different in colour. Value Study isn’t here to replace traditional studies—it’s here to enhance them. Whether you're sketching, painting, or working digitally, this tool makes it easier to focus on the fundamentals of light, shadow, and form. Try it for free with all features enabled on sample images from Unsplash before deciding to unlock the full app with a low-cost yearly or lifetime purchase. All Value Study Pro upgrades count as lifetime purchase. Either option will unlock Value Study across iPhone, iPad and Mac. Annual: Auto-renews yearly. Lifetime: One-time payment, no fees. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Percolator4 screens
Value Study4 screens

Verdict

The call

The clearest difference is price: Value Study at Free against Percolator's $3.99. Value Study also leads on update cadence (fortnightly vs every 4 months). Percolator's advantage is in-app purchases (none vs 7) and chart position (#81 vs unranked). On rating, review sentiment, ratings volume and ads 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

Value Study is free to download; Percolator costs $3.99 up front. Value Study sells 7 in-app purchases, starting at $3.99 per year. Percolator asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.8 for Percolator against 4.8 for Value Study. Both are backed by a comparable volume of ratings — 1.1K and 3.3K respectively. Written reviews are what separate them: 86% of Percolator's written reviews are positive against 92% of Value Study's.

UpkeepUpdate frequency

Percolator ships an update every 4 months, Value Study fortnightly. Both last shipped on October 15, 2026.

Scorecard5 real differences · 6 level
Percolator versus Value Study: the parameters behind the verdict, then further details
ParameterPercolatorValue Study
Price$3.99Free — better
Rating4.8 (1.1K ratings)4.8 (3.3K ratings)
Positive reviews86.4% of reviews92.0% of reviews — better
Number of ratings1.1K3.3K — better
Update frequencyEvery 4 monthsFortnightly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
Best chart rank#81 — better—
DevicesiPhone, iPad, iPodiPhone, iPad, Mac
Requires iOS15.6 — better16.6
Further details — not scored
Size37 MB35 MB
Age rating4+4+
DeveloperTinrocket, LLCDiem Limited

Customer experience

Percolator

All ratings1,133 ratings
Positive96.8%
Neutral2.2%
Negative1.0%
Written reviews419 reviews
Positive86.4%
Neutral6.7%
Negative6.9%

Value Study

All ratings3,333 ratings
Positive96.7%
Neutral1.3%
Negative2.0%
Written reviews200 reviews
Positive92.0%
Neutral1.5%
Negative6.5%

User reviews

Percolator

From 1.1K App Store ratings

What we love

  • 👍 Fantastic app, never disappoints
  • 👍 Lush, beautiful mosaics
  • 👍 Credible app with years of history
  • 👍 Endlessly entertaining
  • 👍 Helps create unique art

Room to improve

  • 🐛 Needs to remember export settings
  • 🐛 Image quality not good enough for printing
  • 🐛 Crashes on launch for some users
  • 🔍 Interface too small, needs more screen space
  • 🔍 Lacks a 'regrind' button

Value Study

From 3.3K App Store ratings

What we love

  • 👍 Easy to use
  • 🚀 Helpful for value studies
  • 💡 Allows adjusting number of values
  • 🎨 Useful for artists and painters
  • ⭐ Great tool for beginners

Room to improve

  • 🐛 Issues with accurately representing blue hues
  • 🔍 Difficulty finding/importing photos
  • 🤔 Unclear instructions/lack of tutorial

Bugs and requests

Percolator

Reported bugs

2 issues
  • Login screen freezes
  • Incompatible with older devices

Requested features

10 requests
  • Ability to save and name custom settings
  • Show which iteration of settings was used
  • Load last used settings
  • Add more example art
  • Ability to select areas to exclude from effects
Show 5 more
  • Add vector/PDF export
  • Slider to control bubble size variation
  • Batch processing option
  • More control over colors and sizes
  • Ability to mask or erase parts of the image

Value Study

Reported bugs

2 issues
  • App crashes or fails to launch on some devices
  • Occasional issues with image processing

Requested features

4 requests
  • Add ability to adjust value midpoint
  • Include color study/color adjustment options
  • Provide side-by-side comparison of original and simplified images
  • Add customizable grid overlay

In-app purchases

None

Percolator

No in-app purchases

7 purchases

Value Study

Subscriptions2
  • Value Study Pro$3.991 Year
  • Value Study Pro (yearly)$6.991 Year
One-time5
  • Appreciation$2.99
  • Value Study Pro (Lifetime)$9.99
  • Generous boost$9.99
Show 2 more
  • Value Study$17.99
  • Amazing supporter$24.99

Questions

Is Percolator free?
Percolator costs $3.99, with no in-app purchases.
Is Value Study free?
Value Study is free to download, with in-app purchases available.
Which has better reviews, Percolator or Value Study?
Percolator and Value Study are both rated 4.8 out of 5 on the App Store, from 1.1K and 3.3K ratings respectively.
Do Percolator or Value Study have ads?
Neither Percolator nor Value Study shows ads.
Which is updated more often, Percolator or Value Study?
Percolator ships an update every 4 months, and Value Study fortnightly. Most recently, Percolator was updated on October 15, 2026 and Value Study on October 15, 2026.

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