# Langtern English vs Ocean Ecostructures

The clearest difference is in-app purchases: Ocean Ecostructures at none against Langtern English's 8. Ocean Ecostructures also leads on iOS requirement (13.0 vs 15.0). Langtern English's advantage is update cadence (every 11 days vs every 6 weeks). On price, ads and device support there is nothing between them.

Both are free to download. Langtern English sells 8 in-app purchases, starting at $2.99 per month. Ocean Ecostructures asks for nothing beyond the download.

Langtern English ships an update every 11 days, Ocean Ecostructures every 6 weeks. The most recent releases landed on October 27, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Langtern English | Ocean Ecostructures |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 11 days** | Every 6 weeks |
| Size | 88 MB | 53 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Noe Casas](https://appshunter.io/developer/1554898146) | [SEASTAINABLEVENTURES SL](https://appshunter.io/developer/1650356766) |

## What reviewers say

### Langtern English

[App page](https://appshunter.io/ios/app/langtern-english/id1615593750)

**Features:** macOS Compatibility

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Student Plus | $2.99 | per month |
| Teacher Mini | $4.99 | per month |
| Teacher Premium | $7.99 | per month |
| Teacher Max | $12.99 | per month |
| Student Plus | $23.49 | per year |
| Teacher Mini | $49.99 | per year |
| Teacher Premium | $79.99 | per year |
| Teacher Max | $129.99 | per year |


### Ocean Ecostructures

[App page](https://appshunter.io/ios/app/ocean-ecostructures/id6443895671)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Langtern English free?

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

### Is Ocean Ecostructures free?

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

### Do Langtern English or Ocean Ecostructures have ads?

Neither Langtern English nor Ocean Ecostructures shows ads.

### Which is updated more often, Langtern English or Ocean Ecostructures?

Langtern English ships an update every 11 days, and Ocean Ecostructures every 6 weeks. Most recently, Langtern English was updated on October 27, 2026 and Ocean Ecostructures on November 3, 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.*