Comparison

TopOpt 3D vs ODE

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

Head to head
About

TopOpt 3D

Perform 3D structural optimization using topology optimization on your iPad or iPhone. Adjust loads, supports, volume fractions, and grid sizes to observe design evolution. Experiment with different parameters to discover new minimums.

Highlights
  • 3D topology optimization
  • Adjustable loads and supports
  • Variable volume fractions
  • Experiment with grid sizes
  • Design evolution visualization
Features
Read full description

Use your iPad/iPhone to perform structural optimization by the topology optimization method in 3D ! Move loads and supports and watch the design evolve to a new minimum. Experiment with different volume fractions and grid sizes and see what happens.

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 ẋ = 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!

Screenshots

TopOpt 3D1 screens
ODE4 screens

Verdict

The call

The clearest difference is ads: TopOpt 3D at none against ODE's shown. TopOpt 3D also leads on iOS requirement (11.0 vs 15.1). On price, update cadence, in-app purchases 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

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

TopOpt 3D ships an update every 6 weeks, ODE every 5 weeks. The most recent releases landed on October 4, 2026 and October 12, 2026 respectively.

Scorecard2 real differences · 8 level
TopOpt 3D versus ODE: the parameters behind the verdict, then further details
ParameterTopOpt 3DODE
PriceFreeFree
Rating3.7 (3 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings3 — better—
Update frequencyEvery 6 weeksEvery 5 weeks — better
AdsNo — betterYes
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS11.0 — better15.1
Further details — not scored
Size103 MB41 MB
Age rating4+4+
DeveloperDTU Mechanical EngineeringOm Prakash Chapagain

In-app purchases

None

TopOpt 3D

No in-app purchases

None

ODE

No in-app purchases

Questions

Is TopOpt 3D free?
TopOpt 3D is free to download, with no in-app purchases.
Is ODE free?
ODE is free to download, with no in-app purchases.
Do TopOpt 3D or ODE have ads?
ODE shows ads; TopOpt 3D does not.
Which is updated more often, TopOpt 3D or ODE?
TopOpt 3D ships an update every 6 weeks, and ODE every 5 weeks. Most recently, TopOpt 3D was updated on October 4, 2026 and ODE on October 12, 2026.

Other comparisons