# ODE Solver + vs Operational Amplifiers Guide

The clearest difference is update cadence: ODE Solver + at weekly against Operational Amplifiers Guide's every 2 months. ODE Solver + also leads on iOS requirement (14.0 vs 16.0). On price, ads, 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.

ODE Solver + ships an update weekly, Operational Amplifiers Guide every 2 months. The most recent releases landed on October 24, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | ODE Solver + | Operational Amplifiers Guide |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (4 ratings)](https://appshunter.io/ios/app/ode-solver-plus/id1549447510/reviews)** | — |
| Number of ratings | **4** | — |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | **Weekly** | Every 2 months |
| Monetization | Ad-supported | — |
| Size | 11 MB | 17 MB |
| Requires iOS | **14.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Takahiko Nakade](https://appshunter.io/developer/1513184888) | [ALG Software Lab](https://appshunter.io/developer/1650561236) |

## 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


### Operational Amplifiers Guide

[App page](https://appshunter.io/ios/app/operational-amplifiers-guide/id6467499897)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is ODE Solver + free?

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

### Is Operational Amplifiers Guide free?

Operational Amplifiers Guide is free to download, with no in-app purchases.

### Do ODE Solver + or Operational Amplifiers Guide have ads?

Both ODE Solver + and Operational Amplifiers Guide show ads.

### Which is updated more often, ODE Solver + or Operational Amplifiers Guide?

ODE Solver + ships an update weekly, and Operational Amplifiers Guide every 2 months. Most recently, ODE Solver + was updated on October 24, 2026 and Operational Amplifiers Guide on October 1, 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.*