# Formula Conversion vs Einstein's Elevator

The clearest difference is price: Formula Conversion at Free against Einstein's Elevator's $1.99. Einstein's Elevator's advantage is in-app purchases (none vs 1). On ads, device support and iOS requirement there is nothing between them.

Formula Conversion is free to download; Einstein's Elevator costs $1.99 up front. Formula Conversion sells 1 one-off in-app purchase. Einstein's Elevator asks for nothing beyond the download.

## The numbers

| Metric | Formula Conversion | Einstein's Elevator |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 26 months | — |
| Size | 2 MB | 41 MB |
| Requires iOS | 14.1 | **13.2** |
| Devices | **iPhone, iPad, iPod** | iPad, Apple TV |
| Age rating | 4+ | 4+ |
| Developer | [Janek Soomets](https://appshunter.io/developer/1315295062) | [Ventura Educational Systems](https://appshunter.io/developer/371324172) |

## What reviewers say

### Formula Conversion

[App page](https://appshunter.io/ios/app/formula-conversion/id1586539965)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Upgrade Formula Conversion | $3.99 | one-time |


### Einstein's Elevator

[App page](https://appshunter.io/ios/app/einsteins-elevator/id6648794228)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Formula Conversion free?

Formula Conversion is free to download, with in-app purchases available.

### Is Einstein's Elevator free?

Einstein's Elevator costs $1.99, with no in-app purchases.

### Do Formula Conversion or Einstein's Elevator have ads?

Neither Formula Conversion nor Einstein's Elevator shows ads.

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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.*