# EMS2024 vs Otto

The clearest difference is in-app purchases: EMS2024 at none against Otto's 6. Otto's advantage is device support (4 vs 1). On price, update cadence, ads and iOS requirement there is nothing between them.

Both are free to download. Otto sells 6 in-app purchases, starting at $2.99 per month. EMS2024 asks for nothing beyond the download.

EMS2024 ships an update every 3 days, Otto every 5 days. Both last shipped on October 11, 2026.

## The numbers

| Metric | EMS2024 | Otto |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 5 days |
| Size | 22 MB | 159 MB |
| Requires iOS | 16.1 | **16.0.0** |
| Devices | iPhone | **iPhone, iPad, Mac, Apple Watch** |
| Age rating | 4+ | 17+ |
| Developer | [Copernicus.org](https://appshunter.io/developer/507132942) | [Tom Honey](https://appshunter.io/developer/1782767469) |

## What reviewers say

### EMS2024

[App page](https://appshunter.io/ios/app/ems2024/id6593668685)

**Features:** macOS Compatibility

**In-app purchases:** none


### Otto

[App page](https://appshunter.io/ios/app/otto-language-learning/id6738887838)

**Features:** Apple Watch app

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Otto Pro - Monthly | $2.99 | per month |
| Otto Pro - Yearly | $29.99 | per year |
| 20 Tokens | $1.99 | one-time |
| 70 Tokens | $4.99 | one-time |
| 180 Tokens | $9.99 | one-time |
| 450 Tokens | $24.99 | one-time |


## Frequently asked questions

### Is EMS2024 free?

EMS2024 is free to download, with no in-app purchases.

### Is Otto free?

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

### Do EMS2024 or Otto have ads?

Neither EMS2024 nor Otto shows ads.

### Which is updated more often, EMS2024 or Otto?

EMS2024 ships an update every 3 days, and Otto every 5 days. Most recently, EMS2024 was updated on October 11, 2026 and Otto on October 11, 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.*