Comparison

ODE vs Simplex Optima

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

Head to head
About

ODE

Features
Read full description

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!

About

Simplex Optima

Features
Read full description

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

ODE4 screens
Simplex Optima4 screens

Verdict

The call

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

CostPrice Β· In-app purchases Β· Ads Β· Monetization

ODE costs $1.99 and Simplex Optima $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

ODE ships an update monthly, Simplex Optima every 5 days. The most recent releases landed on August 16, 2026 and September 10, 2026 respectively.

Scorecard3 real differences Β· 3 level
ODE versus Simplex Optima: the parameters behind the verdict, then further details
ParameterODESimplex Optima
Price$1.99 β€” better$2.99
Update frequencyMonthlyEvery 5 days β€” better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.113.3 β€” better
Further details β€” not scored
Size37 MB2 MB
Age rating4+4+
DeveloperOm Prakash ChapagainKonstantinos Ladiellis

In-app purchases

None

ODE

No in-app purchases

None

Simplex Optima

No in-app purchases

Questions

Is ODE free?
ODE costs $1.99, with no in-app purchases.
Is Simplex Optima free?
Simplex Optima costs $2.99, with no in-app purchases.
Do ODE or Simplex Optima have ads?
Neither ODE nor Simplex Optima shows ads.
Which is updated more often, ODE or Simplex Optima?
ODE ships an update monthly, and Simplex Optima every 5 days. Most recently, ODE was updated on August 16, 2026 and Simplex Optima on September 10, 2026.

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