# ODE vs Calcu

The clearest difference is ads: Calcu at none against ODE's shown. Calcu also leads on update cadence (every 3 days vs every 5 weeks). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

ODE ships an update every 5 weeks, Calcu every 3 days. The most recent releases landed on September 18, 2026 and June 8, 2026 respectively.

## The numbers

| Metric | ODE | Calcu |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/calcu-logarithm/id6698852208/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 5 weeks | **Every 3 days** |
| Monetization | — | Free |
| Size | 41 MB | 3 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Om Prakash Chapagain](https://appshunter.io/developer/1618620262) | [Yuri Morozov](https://appshunter.io/developer/1582368813) |

## What reviewers say

### ODE

[App page](https://appshunter.io/ios/app/ode-solver-integrator/id1619296705)

**Features:** macOS Compatibility

**In-app purchases:** none


### Calcu

[App page](https://appshunter.io/ios/app/calcu-logarithm/id6698852208)

This app provides advanced logarithmic calculations and explanations, covering equation solving, Taylor series, digit-by-digit computation, and integral definitions. It also simplifies expressions, solves complex logarithmic equations, and includes a virtual slide rule.

**Highlights:** Solves logarithmic equations for y, x, and a, Explains Taylor series for log_e(x), Illustrates digit-by-digit log_10(x) computation, Explains log_e definition via integrals, Simplifies logarithmic expressions, Calculates and graphs complex logarithms, Includes virtual slide rule

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ODE free?

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

### Is Calcu free?

Calcu is free to download, with no in-app purchases.

### Do ODE or Calcu have ads?

ODE shows ads; Calcu does not.

### Which is updated more often, ODE or Calcu?

ODE ships an update every 5 weeks, and Calcu every 3 days. Most recently, ODE was updated on September 18, 2026 and Calcu on June 8, 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.*