gDrawPro vs Project Chiron
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
gDrawPro
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Move! Move! It moves! You can draw and move your graphs! Setting invariables in the formula and changing the value, you can move your graphs freely! AMAZINGLY MANY KINDS OF GRAPHS! You can draw many kinds of graphs by setting function such as y=f(x), x=f(y), x=f(t) and y=g(t), f(x,y)=0, pole equation. MOVE GRAPHS! This is the greatest feature of this app! We prepared "m" as an invariable. You can change the value continuously and see the graph moving. Using this feature, you can see many interesting moves, such as simple oscillation, cycloid curve, synthesis of waves. ORIGINAL KEYBOARD! We prepared the original keyboard specialized for mathematical formulas. You can type mathematical formulas very easily. SEE MANY GRAPHS SIMULTANEOUSLY! You can set unlimited number of graphs and see them simultaneously. VERY CONVENIENT TOOL "com". By using this, you can draw line segments, circles, points and texts very easily. For example, you can draw a line segments by setting the starting point and the end point. MANY INTERESTING SAMPLES! You can load many interesting samples from “Load SampleCom”. They are not only interesting, but also help you to master this app. SAVE AND LOAD GRAPHS! You can save and load your original graphs! TAKE A PHOTO OF YOUR GRAPH! You easily take a photo of your graph by pushing “photo button”.
Project Chiron
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Stuck on a math problem you refuse to give up on? Chiron writes the smallest hint on your page, just enough to keep you thinking, without spoiling the math. Write your working by hand. Chiron reads every line as you go and steps in only when it helps: a nudge when you're stuck, a question when you're close, a quiet check when you're not sure. It teaches. It never lectures. KEEP THINKING • Hints sized to the moment: the smallest push that keeps you moving • Get pointed at the slip, not handed the answer • Ask out loud, "where do I even start?", and talk it through DOES THE MATH PROPERLY • Every check is grounded in a real symbolic engine, so feedback is exact, never a chatbot's guess • Catches the sign you flipped, the solution you gained, the step that doesn't follow • Built for real work: algebra, trigonometry, calculus, ODEs, logs and more BRING YOUR OWN • Snap any problem with the camera and start working • Upload your notes and Chiron works from your course, not a generic one Best with an Apple Pencil. Chiron. Keep thinking.
Screenshots
Verdict
The clearest difference is in-app purchases: Project Chiron at none against gDrawPro's 1. Project Chiron also leads on update cadence (weekly vs every 18 months). gDrawPro's advantage is iOS requirement (8.0 vs 16.0). 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
Both are free to download. gDrawPro sells 1 one-off in-app purchase. Project Chiron asks for nothing beyond the download.
gDrawPro ships an update every 18 months, Project Chiron weekly. The most recent releases landed on October 11, 2026 and October 4, 2026 respectively.
| Parameter | gDrawPro | Project Chiron |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 18 months | Weekly — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Devices | iPad | iPhone, iPad — better |
| Requires iOS | 8.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 8 MB | 167 MB |
| Age rating | 4+ | 4+ |
| Developer | Jirou Fukuda | James Booth |
In-app purchases
gDrawPro
- gDrawForiPad$2.99
Project Chiron
No in-app purchases
Questions
Is gDrawPro free?
Is Project Chiron free?
Do gDrawPro or Project Chiron have ads?
Which is updated more often, gDrawPro or Project Chiron?
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