# ODE Solver vs Exponential & Log Calculator

The clearest difference is price: Exponential & Log Calculator at Free against ODE Solver's $2.99. Exponential & Log Calculator also leads on update cadence (every 3 weeks vs every 8 months). ODE Solver's advantage is in-app purchases (none vs 8) and iOS requirement (13.0 vs 15.0). On ads and device support there is nothing between them.

Exponential & Log Calculator is free to download; ODE Solver costs $2.99 up front. Exponential & Log Calculator sells 8 one-off in-app purchases. ODE Solver asks for nothing beyond the download.

ODE Solver ships an update every 8 months, Exponential & Log Calculator every 3 weeks. The most recent releases landed on September 17, 2026 and August 20, 2026 respectively.

## The numbers

| Metric | ODE Solver | Exponential & Log Calculator |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 3 weeks** |
| Size | 4 MB | 183 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [DRH YAZILIM VE MUHENDISLIK HIZMETLERI LTD STI](https://appshunter.io/developer/914295588) | [Glindemann, Sennoun, Langer GbR](https://appshunter.io/developer/1024972809) |

## What reviewers say

### ODE Solver

[App page](https://appshunter.io/ios/app/ode-solver/id982923512)

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

**In-app purchases:** none


### Exponential & Log Calculator

[App page](https://appshunter.io/ios/app/exponential-and-log-calculator/id1662899878)

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| +30 User Tokens | $0.29 | one-time |
| +1 Convenience Token / 6h, max. +2 | $0.59 | one-time |
| +2 Convenience Tokens / 6h, max. +4 | $0.99 | one-time |
| +150 User Tokens | $0.99 | one-time |
| +300 User Tokens | $1.49 | one-time |
| +4 Convenience Tokens / 6h, max. +8 | $1.59 | one-time |
| Remove Ads | $1.99 | one-time |
| Lifetime Access | $1.99 | one-time |


## Frequently asked questions

### Is ODE Solver free?

ODE Solver costs $2.99, with no in-app purchases.

### Is Exponential & Log Calculator free?

Exponential & Log Calculator is free to download, with in-app purchases available.

### Do ODE Solver or Exponential & Log Calculator have ads?

Neither ODE Solver nor Exponential & Log Calculator shows ads.

### Which is updated more often, ODE Solver or Exponential & Log Calculator?

ODE Solver ships an update every 8 months, and Exponential & Log Calculator every 3 weeks. Most recently, ODE Solver was updated on September 17, 2026 and Exponential & Log Calculator on August 20, 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.*