Comparison

AmbiPad vs Charcoal Studio

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

Head to head
About

AmbiPad

Features
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AmbiPad is an iPad/iPhone drawing app specialized for creating ambigrams (text designs that can be read the same way even when turned upside down or viewed from different angles). With intuitive controls, anyone can easily create beautiful ambigrams. Just draw a single line and the symmetrical line will automatically appear, allowing you to create designs that can be viewed from both directions. We've incorporated various symmetry modes ideal for ambigram creation, including point symmetry, line symmetry (horizontal, vertical, diagonal), and 90-degree rotation. You can freely edit lines while maintaining symmetry, cut them with the scissors tool, and move or rotate selected parts, making it possible to create complex ambigram designs just as you imagine them. Customization options are plentiful, including four color themes (standard, inverted, blue, brown), and the ability to change line thickness and end styles. Completed works can be saved and shared in PNG or SVG format. Supports Japanese, English, and French. Comfortable to use on both iPad's large screen and iPhone. Enjoy the world of ambigrams with AmbiPad.

About

Charcoal Studio

Features
Read full description

Charcoal Studio brings the feel of a real charcoal sketchbook to iPhone and iPad. Pick up a stick, lay down rich, grainy tone, then blend it into smooth gradients or lift it back out, the way you would on paper. A FULL CHARCOAL KIT
 • Charcoal Pencil: fine lines and crisp detail
 • Vine Charcoal: soft, light marks for loose sketching
 • Compressed Charcoal: dense, velvety blacks
 • Charcoal Block: broad strokes for shading large areas
 • White Charcoal: highlights on toned and dark paper
 • Charcoal Powder: soft washes of tone
 • Lasso: select, move and resize your strokes BLEND AND LIFT LIKE THE REAL THING
 • Blending Stump: push charcoal into the paper’s grain, soften hard edges and build smooth tonal transitions. It moves only charcoal, never the paper, so your darks stay rich.
 • Kneaded Eraser: dab or drag to lift charcoal gently and add highlights. It follows the tooth of the paper, so lightened areas keep their natural texture.
 • Eraser: clean removal whenever you need it. MADE FOR APPLE PENCIL
 • Pressure and tilt shape every mark
 • Strokes are smoothed so blending and erasing follow your hand without jagged corners
 • Double-tap or squeeze Apple Pencil to switch tools or show tool settings
 • Draw with your finger too, or turn finger drawing off for Pencil-only work PAPER WITH TOOTH
 • Five papers: white, cream, toned gray, slate and black
 • A real paper grain shows through every stroke
 • Choose your canvas: portrait, landscape, square, or any custom size from 256 to 4096 pixels AN EXPERIENCE THAT FEELS ANALOG
 • Hear the scratch of charcoal when you hatch, while ordinary lines stay quiet
 • Pinch to zoom and pan around your page
 • Ruler for straight edges
 • Charcoal-tone palette, plus your own saved colours
 • Size, opacity and strength controls for every tool YOUR SKETCHBOOK
 • Every sketch saves automatically
• Unlimited sketches in your gallery
 • Undo and redo as many steps as you need
 • Export at full resolution and share anywhere Everything stays on your device: no account and no sign-up. Focus on your drawing. Leave the dust on the paper. Privacy policy: https://digitalhole.github.io/LilArtist.html Standard Apple Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

AmbiPad2 screens
Charcoal Studio4 screens

Verdict

The call

The clearest difference is in-app purchases: AmbiPad at none against Charcoal Studio's 1. On price, update cadence, 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. Charcoal Studio sells 1 one-off in-app purchase. AmbiPad asks for nothing beyond the download.

UpkeepUpdate frequency

AmbiPad ships an update weekly, Charcoal Studio every 3 days. The most recent releases landed on October 30, 2026 and November 6, 2026 respectively.

Scorecard1 real difference · 5 level
AmbiPad versus Charcoal Studio: the parameters behind the verdict, then further details
ParameterAmbiPadCharcoal Studio
PriceFreeFree
Update frequencyWeeklyEvery 3 days — better
AdsNoNo
In-app purchasesNo — betterYes
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.0 — better18.0
Further details — not scored
Size4 MB14 MB
Age rating4+4+
DeveloperMasao NarumiDigital Hole Pvt. Ltd.

In-app purchases

None

AmbiPad

No in-app purchases

1 purchases

Charcoal Studio

One-time1
  • Unlock All Features$4.99

Questions

Is AmbiPad free?
AmbiPad is free to download, with no in-app purchases.
Is Charcoal Studio free?
Charcoal Studio is free to download, with in-app purchases available.
Do AmbiPad or Charcoal Studio have ads?
Neither AmbiPad nor Charcoal Studio shows ads.
Which is updated more often, AmbiPad or Charcoal Studio?
AmbiPad ships an update weekly, and Charcoal Studio every 3 days. Most recently, AmbiPad was updated on October 30, 2026 and Charcoal Studio on November 6, 2026.

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