# Formula Conversion vs Learn and Transcribe ET Lang

The clearest difference is in-app purchases: Learn and Transcribe ET Lang at none against Formula Conversion's 1. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Formula Conversion sells 1 one-off in-app purchase. Learn and Transcribe ET Lang asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 26 months. The most recent releases landed on June 12, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | Formula Conversion | Learn and Transcribe ET Lang |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 26 months | Every 26 months |
| Size | 2 MB | 45 MB |
| Requires iOS | 14.1 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Janek Soomets](https://appshunter.io/developer/1315295062) | [Ethiopian Artificial Intelligence Institute](https://appshunter.io/developer/1722941731) |

## 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 |


### Learn and Transcribe ET Lang

[App page](https://appshunter.io/ios/app/learn-and-transcribe-et-lang/id6474970501)

**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 Learn and Transcribe ET Lang free?

Learn and Transcribe ET Lang is free to download, with no in-app purchases.

### Do Formula Conversion or Learn and Transcribe ET Lang have ads?

Neither Formula Conversion nor Learn and Transcribe ET Lang shows ads.

### Which is updated more often, Formula Conversion or Learn and Transcribe ET Lang?

Formula Conversion ships an update every 26 months, and Learn and Transcribe ET Lang every 26 months. Most recently, Formula Conversion was updated on June 12, 2026 and Learn and Transcribe ET Lang on September 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.*