Comparison

Graphing Projects vs ChromaKeys

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

Head to head
About

Graphing Projects

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Graphing Projects introduces students to the essential concepts of coordinate geometry. While using the app, students will locate points on a four quadrant grid and draw lines between two points to make specific figures. Designs and geometric figures are randomly generated so the activities are different every time. The app explains how a Cartesian grid is defined and how to locate points using an x-coordinate and a y-coordinate. The app presents a series of instructions for creating geometric figures on the grid. When the student is finished with the diagram, the solution is shown and the students work evaluated. A scoreboard shows the student's progress. Speech is used in the app to give instructions. Sound effects make using the app fun for students.

About

ChromaKeys

This app uses a Japanese-inspired method to teach children musical pitch through interactive lessons and games. It aims to help kids develop perfect pitch, enhancing their ability to understand music as a language. Features include personalized plans, progress tracking, and engaging challenges.

Highlights
  • Interactive music pitch lessons
  • Japanese ear training approach
  • Develops perfect pitch
  • Personalized lesson plans
  • Progress tracking
  • Engaging challenges
Features
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Give kids the gift of musical pitch through daily training in a fun and engaging learning app! ChromaKeys offers a range of interactive lessons that make learning musical pitch enjoyable for kids. The app is based on a Japanese approach that teaches kids music as a language. According to research, younger kids can still gain a skill called "perfect pitch" which allows them to hear music in a unique way. Unlock the potential of your child's musical abilities with personalized lesson plans, progress tracking, interactive challenges, and more. If you experience any issues, email support@chromakeys.com ChromaKeys is a subscription service that gives complete access to the ear training music education content. -Subscriptions are billed monthly or annually at the rate selected depending on subscription plan. - Change your mind at any point. Canceling can be done through your app store subscriptions page. - Subscriptions auto-renew at the cost of the chosen package, unless cancelled 24 hours in advance of the end of the current period. The subscription fee is charged to your Apple account. - Use your subscription on any device registered with the same Apple ID you subscribe from.

Screenshots

ChromaKeys4 screens

Verdict

The call

The clearest difference is price: ChromaKeys at Free against Graphing Projects's $1.99. ChromaKeys also leads on update cadence (monthly vs every 9 months) and iOS requirement (13.0 vs 15.6). Graphing Projects's advantage is in-app purchases (none vs 2). On 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

ChromaKeys is free to download; Graphing Projects costs $1.99 up front. ChromaKeys sells 2 in-app purchases, starting at $4.99 per month. Graphing Projects asks for nothing beyond the download.

UpkeepUpdate frequency

Graphing Projects ships an update every 9 months, ChromaKeys monthly. The most recent releases landed on September 27, 2026 and June 1, 2026 respectively.

Scorecard4 real differences · 6 level
Graphing Projects versus ChromaKeys: the parameters behind the verdict, then further details
ParameterGraphing ProjectsChromaKeys
Price$1.99Free — better
Rating—5.0 (3 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—3 — better
Update frequencyEvery 9 monthsMonthly — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Subscription
DevicesiPad, MaciPhone, iPad, iPod — better
Requires iOS15.613.0 — better
Further details — not scored
Size22 MB54 MB
Age rating4+4+
DeveloperVentura Educational SystemsDeliver Software, LLC

In-app purchases

None

Graphing Projects

No in-app purchases

2 purchases

ChromaKeys

Subscriptions2
  • ChromaKeys Monthly7 Days trial$4.991 Month
  • ChromaKeys Annual Subscription1 Month trial$49.991 Year

Questions

Is Graphing Projects free?
Graphing Projects costs $1.99, with no in-app purchases.
Is ChromaKeys free?
ChromaKeys is free to download, with in-app purchases available.
Do Graphing Projects or ChromaKeys have ads?
Neither Graphing Projects nor ChromaKeys shows ads.
Which is updated more often, Graphing Projects or ChromaKeys?
Graphing Projects ships an update every 9 months, and ChromaKeys monthly. Most recently, Graphing Projects was updated on September 27, 2026 and ChromaKeys on June 1, 2026.

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