Leto is an English learning app that transforms English vocabulary into “usable knowledge” through example sentences and a variety of test formats.
Currently, it offers learning content focused on frequently appearing words in TOEIC, TOEFL, and IELTS. It’s ideal not only for exam preparation but also for strengthening your English foundation.

◆ App Features

Understand how to use words with example sentences
Every word comes with natural English example sentences. You can learn not only the meaning but also how the word is used in context.

Reinforce memory with diverse test formats
You can repeatedly review learned words through the following three test formats:

Multiple-choice quizzes: Check the basic meaning

Sentence rearrangement: Improve sentence structure and word order understanding

Flashcards: Simple repetitive learning with front-and-back cards
Learning a word from multiple angles helps reinforce memory and enhances application skills.

A system for accurate memorization
A word is not considered “learned” until you answer correctly twice in a row. Words answered correctly only once will continue to appear until fully memorized.

Currently, the app includes vocabulary books tailored to these three exams:

TOEIC: Covers vocabulary focused on business English and daily conversations

TOEFL: Selects vocabulary necessary for academic English

IELTS: Covers a wide range of academic and everyday English vocabulary needed for studying abroad or immigration

◆ About the Premium Plan
You can start learning English vocabulary with Leto’s free plan, but it has the following limitations:

Up to 20 words can be studied per day

Ads are displayed within the app
By subscribing to the Premium Plan (monthly/annual), you unlock these benefits:

Unlimited daily study

All ads are removed from the app
For those who want a more focused learning experience, we recommend the Premium Plan.

◆ Why Choose Leto?

Thorough understanding of word meanings and usage through example sentences

Repetitive design with multiple test formats to reinforce memory

Carefully selected words directly linked to TOEIC/TOEFL/IELTS preparation

“Learned” standard requiring two consecutive correct answers to ensure steady progress

Simple and intuitive interface, perfect for learning in spare moments

◆ Recommended for Those Who

Aim to improve their TOEIC/TOEFL/IELTS scores

Want to understand not only meanings but also how to use words

Wish to steadily build vocabulary every day

Prefer to learn words in context

Want to manage their own review timing while studying

Download Leto now and build real vocabulary skills with example sentences and tests!

Terms of Use: https://leto-app.com/en/terms