# Formulae Community vs ETA

The clearest difference is in-app purchases: ETA at none against Formulae Community's 3. ETA also leads on ads (none vs shown). Formulae Community's advantage is update cadence (every 3 days vs every 2 weeks). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Formulae Community sells 3 in-app purchases, starting at $3.99 per 7 days. ETA asks for nothing beyond the download.

Formulae Community ships an update every 3 days, ETA every 2 weeks. The most recent releases landed on October 27, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Formulae Community | ETA |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 3 days** | Every 2 weeks |
| Size | 48 MB | 51 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [CAPDESIS S.A. DE C.V.](https://appshunter.io/developer/1639711954) | [Teachlr Corp](https://appshunter.io/developer/1464995564) |

## What reviewers say

### Formulae Community

[App page](https://appshunter.io/ios/app/formulae-community/id6445803819)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Chat Semanal | $3.99 | per 7 days |
| Chat Mensual | $7.99 | per month |
| Chat Anual | $79.99 | per year |


### ETA

[App page](https://appshunter.io/ios/app/eta-rm/id6790851355)

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

**In-app purchases:** none


## Frequently asked questions

### Is Formulae Community free?

Formulae Community is free to download, with in-app purchases available.

### Is ETA free?

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

### Do Formulae Community or ETA have ads?

Formulae Community shows ads; ETA does not.

### Which is updated more often, Formulae Community or ETA?

Formulae Community ships an update every 3 days, and ETA every 2 weeks. Most recently, Formulae Community was updated on October 27, 2026 and ETA on October 25, 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.*