Comparison

Cosmic Brush vs Paint Diary

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

Head to head
About

Cosmic Brush

Unleash your creativity with a powerful digital art application. Explore unique painting tools, intuitive stroke size adjustments based on finger contact, and customizable parameters. Supports left-handed users and offers a universal Pro upgrade for expanded features across Apple devices.

Highlights
  • Unique painting tools (3D-Shaded, Halo, Plasma Chain)
  • Dynamic stroke size based on finger contact
  • Adjustable parameters during painting
  • Left-handed toolbar option
  • Universal Pro upgrade
  • Multiple layers
  • Photo tracing mode (Pro)
Features
Read full description

Paint a beautiful piece of art or just doodle on a photo. Only your imagination sets the limits for what you can create! • INSPIRING PAINTING TOOLS • Be as creative as you want with inspiring out-of-this-world painting tools like 3D-Shaded Brush, Halo Brush, Plasma Chain Brush, and Translucent Brush. It also has Lighten and Darken tools, a tremendous help when you want to add some depth and life to your drawings. • FINGERTIP = STROKE SIZE • When you paint, the app measures how much of your finger is touching the screen and changes the stroke size accordingly. Apply just the corner of your fingertip for a thin line, or the whole fingerprint area for a broad stroke. A 2nd tool assigned to your finger will still use this feature, so don’t ignore it just because you have an Apple Pencil! • LEFT-HANDED? • Just swipe the toolbar over to the other side! • PARAMETERS CAN BE CHANGED LIVE • Use any buttons or controls to change/adjust color, size, force, simultaneously while painting. • UNIVERSAL PURCHASE • If you choose to buy the Pro upgrade, this one-time in-app purchase will unlock all Pro features in the app on all available platforms (iPad-iPhone-Mac)! • METAL • The engine is based on Metal, with 128-bit color and floating-point arithmetic. • SWIFT • The app was developed entirely using Swift (earlier versions used C++). • APPLE PENCIL SUPPORT • FULL SCREEN PAINTING • • DARK MODE • LANDSCAPE • PORTRAIT • WIDE COLOR • • MULTIPLE LAYERS • PHOTO TRACING MODE (Pro feature) •

About

Paint Diary

Features
Read full description

Paint Diary provied a rich pallete ,different brush types,an eraserr and a lasso selection tool. Enjoy drowing diary! Best app for you.

Screenshots

Cosmic Brush4 screens
Paint Diary2 screens

Verdict

The call

The clearest difference is in-app purchases: Paint Diary at none against Cosmic Brush's 6. Paint Diary also leads on update cadence (every 5 days vs every 2 months). On price, ads, device support and iOS requirement 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. Cosmic Brush sells 6 one-off in-app purchases. Paint Diary asks for nothing beyond the download.

UpkeepUpdate frequency

Cosmic Brush ships an update every 2 months, Paint Diary every 5 days. The most recent releases landed on October 20, 2026 and October 25, 2026 respectively.

Scorecard2 real differences · 8 level
Cosmic Brush versus Paint Diary: the parameters behind the verdict, then further details
ParameterCosmic BrushPaint Diary
PriceFreeFree
Rating4.6 (132 ratings) — better—
Positive reviews87.5% of reviews—
Number of ratings132 — better—
Update frequencyEvery 2 monthsEvery 5 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad, iPod
Requires iOS12.0 — better13.0
Further details — not scored
Size24 MB5 MB
Age rating4+4+
DeveloperNorbyteKatsuhiro Harada

In-app purchases

6 purchases

Cosmic Brush

One-time6
  • Tip Jar: Smallest Tip$1.00
  • Tip Jar: Small Tip$2.00
  • Tip Jar: Medium Tip$5.00
Show 3 more
  • Pro Upgrade$6.00
  • Tip Jar: Big Tip$10.00
  • Tip Jar: Biggest Tip$25.00
None

Paint Diary

No in-app purchases

Questions

Is Cosmic Brush free?
Cosmic Brush is free to download, with in-app purchases available.
Is Paint Diary free?
Paint Diary is free to download, with no in-app purchases.
Do Cosmic Brush or Paint Diary have ads?
Neither Cosmic Brush nor Paint Diary shows ads.
Which is updated more often, Cosmic Brush or Paint Diary?
Cosmic Brush ships an update every 2 months, and Paint Diary every 5 days. Most recently, Cosmic Brush was updated on October 20, 2026 and Paint Diary on October 25, 2026.

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