# Implicit Differentiation Cal vs ODE

The clearest difference is ads: Implicit Differentiation Cal at none against ODE's shown. Implicit Differentiation Cal also leads on iOS requirement (13.0 vs 15.1). ODE's advantage is update cadence (every 5 weeks vs every 9 months). On price, 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.

Implicit Differentiation Cal ships an update every 9 months, ODE every 5 weeks. Both last shipped on September 18, 2026.

## The numbers

| Metric | Implicit Differentiation Cal | ODE |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 9 months | **Every 5 weeks** |
| Size | 24 MB | 41 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Ahmad Sattar](https://appshunter.io/developer/1458483953) | [Om Prakash Chapagain](https://appshunter.io/developer/1618620262) |

## What reviewers say

### Implicit Differentiation Cal

[App page](https://appshunter.io/ios/app/implicit-differentiation-cal/id1607963477)

**Features:** macOS Compatibility

**In-app purchases:** none


### ODE

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

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Implicit Differentiation Cal free?

Implicit Differentiation Cal is free to download, with no in-app purchases.

### Is ODE free?

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

### Do Implicit Differentiation Cal or ODE have ads?

ODE shows ads; Implicit Differentiation Cal does not.

### Which is updated more often, Implicit Differentiation Cal or ODE?

Implicit Differentiation Cal ships an update every 9 months, and ODE every 5 weeks. Most recently, Implicit Differentiation Cal was updated on September 18, 2026 and ODE on September 18, 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.*