Comparison

Langtern English vs Ocean Ecostructures

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head

Langtern English

Te ayuda a estudiar inglés

About

Langtern English

Features

Read full description

Langtern helps you learn English by assisting you when navigating English web pages, watching videos in English, or reading ebooks/PDFs in English. The terms of service can be found at: https://langtern.com/public/doc/en/tos.html

About

Ocean Ecostructures

Features

Read full description

Ocean Ecostructures aporta soluciones para compensar los impactos negativos de las infraestructuras marinas, a través de la implementación de tecnología de regeneración de última generación. Desarrollamos sistemas para revitalizar infraestructuras marinas, recuperando servicios ecosistémicos monetizables y mejorando la competitividad y el reconocimiento social de nuestros clientes. Implementamos Soluciones Basadas en la Naturaleza que refuerzan la lucha contra el cambio climático y recuperan el medio marino.

Screenshots

Langtern English3 screens

Ocean Ecostructures4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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.

Scorecard3 real differences · 3 level

Langtern English versus Ocean Ecostructures: the parameters behind the verdict, then further details
Parameter	Langtern English	Ocean Ecostructures
Price	Free	Free
Update frequency	Every 11 days — better	Every 6 weeks
Ads	No	No
In-app purchases	Yes	No — better
Devices	iPhone, iPad, iPod — better	iPhone, iPod
Requires iOS	15.0	13.0 — better
Further details — not scored
Size	88 MB	53 MB
Age rating	17+	4+
Developer	Noe Casas	SEASTAINABLEVENTURES SL

In-app purchases

8 purchases

Langtern English

Subscriptions8

Student Plus$2.991 Month
Teacher Mini$4.991 Month
Teacher Premium$7.991 Month

Show 5 more

Teacher Max$12.991 Month
Student Plus$23.491 Year
Teacher Mini$49.991 Year
Teacher Premium$79.991 Year
Teacher Max$129.991 Year

None

Ocean Ecostructures

No in-app purchases

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.