ODE vs CalC
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
ODE
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The ODESolverIntegrator is a simple but elegant app to find the integral of ODEs. You can solve (find the integral of) nonlinear ODEs. You can reduce the higher order ODE to a set of first order ODEs. You can solve (find the integral of) linear ODEs in the form of αΊ = Ax + Bu; y = Cx + Du. This app uses Runge-Kutta 4th order algorithm to solve the ODEs. Once the ODEs are solved, a beautiful interactive graph for each ODE's is created that you can share with other or save it locally. The reduced ODE's equations are presented beautifully in the math-equation format. You can compute definite integral (single, double, tripple). It uses the midpoint method. It automatically saves your hard work locally on your device so you can come back and pick up from where you left off as your great effort will not be lost. This app also has a Study page to help you learn important integration rules like, power rule, product rule, ect. This app is perfect for students learning calculus. Sharpen you brain by using this app and learning about the calculus. This is an app for all student groups. From high school to college to university students. Be creative. Enjoy the app!
CalC
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CalC is a great tool for students, especially those in high school, college, and university, who need to solve complex math and science problems. It features a natural display that allows you to enter equations as you would write them on paper, including fractions, square roots, and exponents. CalC also supports running Python code directly on the phone, making it a versatile tool for learning to code, testing algorithms, and solving advanced problems.
Screenshots
Verdict
The clearest difference is price: CalC at Free against ODE's $1.99. CalC also leads on update cadence (every 4 days vs monthly). ODE's advantage is in-app purchases (none vs 2). On ads, device support and iOS requirement there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
CalC is free to download; ODE costs $1.99 up front. CalC sells 2 in-app purchases, starting at $1.99 per month. ODE asks for nothing beyond the download.
ODE ships an update monthly, CalC every 4 days. The most recent releases landed on October 11, 2026 and October 12, 2026 respectively.
| Parameter | ODE | CalC |
|---|---|---|
| Price | $1.99 | Free β better |
| Update frequency | Monthly | Every 4 days β better |
| Ads | No | No |
| In-app purchases | No β better | Yes |
| Devices | iPhone, iPad, iPod β better | iPhone, iPod |
| Requires iOS | 15.1 | 15.1 |
| Further details β not scored | ||
| Size | 37 MB | 297 MB |
| Age rating | 4+ | 4+ |
| Developer | Om Prakash Chapagain | Le Van Thanh |
In-app purchases
ODE
No in-app purchases
CalC
- Premium monthly$1.991 Month
- Premium yearly$19.991 Year









