# ODE Solver + vs Calculator for Complex Field

The clearest difference is rating: Calculator for Complex Field at 5.0 against ODE Solver +'s 4.0. Calculator for Complex Field also leads on ads (none vs shown) and monetization model (free vs ad-supported). ODE Solver +'s advantage is update cadence (weekly vs fortnightly) and iOS requirement (14.0 vs 17.0). On price, ratings volume, in-app purchases and device support there is nothing between them.

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

Calculator for Complex Field holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 4 and 4 respectively.

ODE Solver + ships an update weekly, Calculator for Complex Field fortnightly. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | ODE Solver + | Calculator for Complex Field |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (4 ratings)](https://appshunter.io/ios/app/ode-solver-plus/id1549447510/reviews) | **[5.0 (4 ratings)](https://appshunter.io/ios/app/calculator-for-complex-field/id6502463794/reviews)** |
| Number of ratings | 4 | 4 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Weekly** | Fortnightly |
| Monetization | Ad-supported | **Free** |
| Size | 11 MB | 1 MB |
| Requires iOS | **14.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Takahiko Nakade](https://appshunter.io/developer/1513184888) | [Jongseung Park](https://appshunter.io/developer/1745560101) |

## What reviewers say

### ODE Solver +

[App page](https://appshunter.io/ios/app/ode-solver-plus/id1549447510)

This utility app calculates ordinary differential equations using the Runge-Kutta method. It offers a step width of 0.01 for its calculations.

**Highlights:** Ordinary differential equation calculation, Runge-Kutta method, Step width 0.01

**In-app purchases:** none


### Calculator for Complex Field

[App page](https://appshunter.io/ios/app/calculator-for-complex-field/id6502463794)

Input natural math expressions and get instant results on a separate line, allowing for easy revisions. Save up to 20 inputs and incorporate saved answers into new expressions. Supports complex field calculations with adjustable decimal digits and three output formats.

**Highlights:** Natural math expression input, Automatic result display, Input revision for updated results, Save and reuse up to 20 inputs, Incorporate saved answers into expressions, Complex field calculations, Adjustable decimal digits, Three output formats (Fixed, Scientific, Engineering)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ODE Solver + free?

ODE Solver + is free to download, with no in-app purchases.

### Is Calculator for Complex Field free?

Calculator for Complex Field is free to download, with no in-app purchases.

### Which has better reviews, ODE Solver + or Calculator for Complex Field?

Calculator for Complex Field is rated higher. ODE Solver + averages 4.0 out of 5 from 4 ratings, while Calculator for Complex Field averages 5.0 from 4 ratings.

### Do ODE Solver + or Calculator for Complex Field have ads?

ODE Solver + shows ads; Calculator for Complex Field does not.

### Which is updated more often, ODE Solver + or Calculator for Complex Field?

ODE Solver + ships an update weekly, and Calculator for Complex Field fortnightly. Most recently, ODE Solver + was updated on November 3, 2026 and Calculator for Complex Field on November 4, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*