ODE vs Simplex Optima
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!
Simplex Optima
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The general form of an optimization problem comprises a linear function of variables, also called "objective function" and a number of constraint inequalities. The app can facilitate a maximisation as well as minimisation problem bearing up to 7 variables and up to 6 contraint inequalities. The solution algorithm is implemented by constructing and manipulating the Simplex tableau before calculating the parameters for which the maximum value of the objective function is obtained.
Screenshots
Verdict
The clearest difference is update cadence: Simplex Optima at every 5 days against ODE's monthly. Simplex Optima also leads on iOS requirement (13.3 vs 15.1). ODE's advantage is price ($1.99 vs $2.99). On ads, in-app purchases and device support 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
ODE costs $1.99 and Simplex Optima $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
ODE ships an update monthly, Simplex Optima every 5 days. The most recent releases landed on August 16, 2026 and September 10, 2026 respectively.
| Parameter | ODE | Simplex Optima |
|---|---|---|
| Price | $1.99 β better | $2.99 |
| Update frequency | Monthly | Every 5 days β better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.1 | 13.3 β better |
| Further details β not scored | ||
| Size | 37 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Om Prakash Chapagain | Konstantinos Ladiellis |
In-app purchases
ODE
No in-app purchases
Simplex Optima
No in-app purchases
Questions
Is ODE free?
Is Simplex Optima free?
Do ODE or Simplex Optima have ads?
Which is updated more often, ODE or Simplex Optima?
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