How dailyBe’s content is made, and where it can go wrong

There’s no hand-written sentence bank behind the dictionary. That’s what lets you look up any word, expression or phrasal verb from any field, instead of only what’s on a ready-made list: a technical term from your job and a piece of slang from a show get the same treatment, with at least five example sentences and audio.

What that means in terms of limits

AI-generated content can be wrong in ways that aren’t always obvious. In practice:

• a sentence can sound unnatural even when it’s grammatically correct;
• the meaning in an example can be right in general but not the one you ran into in your context;
• the register can be off: an informal expression presented as neutral, or the other way around;
• the translation may not match the sentence exactly;
• an audio clip can have odd pronunciation, intonation or rhythm.

That’s why it’s worth reading more than one example before you add a word to your list. And if something looks wrong, report it: that’s how a mistake reaches a person.

Report a sentence whenever it:

• has a translation that’s wrong or doesn’t match the meaning of the word you looked up;
• has audio with the wrong pronunciation, or audio that doesn’t match the text;
• is wrong or doesn’t make sense.

Reporting is the bridge between what the AI produces and a human set of eyes: every reported sentence goes through human review. The more specific the problem, the easier it is to fix.

For now, the app doesn’t notify you when the review of a sentence you reported is done.

Here’s how it works:

1. Every time a word comes up in practice, the app records whether you got it right or wrong.
2. The math is simple: correct answers divided by times seen. Once that ratio passes a set percentage, the word is marked learned and stops being a focus.
3. Once every word in a sentence is learned, the sentence leaves active study and the app moves the next ones on your list up.

That’s why we measure word by word, not sentence by sentence. In The book is on the table, you may have already learned the and is while you’re still learning book and table. The sentence stays in practice until the rest sticks.

What about word frequency?

The app doesn’t show any frequency score or scale. But the research on word frequency is a useful guide when you’re deciding what to look up and add to your list. A small number of words make up most of what people say, and what intermediate learners are missing tends to sit in the middle: common enough that native speakers use it without thinking, rare enough to slip through the cracks of most courses.

To dig deeper: The words your English is missing and How many words you need to watch shows without subtitles.

How it works in the app

A sentence’s schedule, counted from your first practice:

There’s no daily cap on reviews.

Since each word shows up in several sentences, it also comes back at different times and in different contexts, which spreads out your contact with it even more.

What the research says

Two ideas with a lot of research behind them: spread reviews out over time instead of cramming them together, and review by trying to remember instead of rereading. Here’s what the key studies found:

To dig deeper: Spaced repetition explained and Why you forget the English you study.

Practicing the same sentence in different modes is how you work both ends: understanding what you hear and read, and producing the sentence when you need it. More in I understand English but can’t speak it.

The three modes

• Speaking: you say the sentence out loud. The app uses speech recognition to show what it heard and, if that doesn’t match the sentence, gives you a pronunciation tip spelled the way a Brazilian would read it, like “róu ariu?” for How are you? or “ai xúdav nôun bérer” for I should have known better.
• Seeing: you practice the sentence from what’s on screen, which helps lock in the spelling and the words that travel together.
• Listening: you practice the sentence by ear, at the speed people actually talk.

• The articles are written with AI assistance and go through source checking: every number or research finding cited comes from a source listed at the end of the article, with a link.
• We favor primary sources: research papers, reviews and meta-analyses, reference dictionaries for word meanings, and official glossaries for technical terms.
• When a study has limits (a single subject, artificial material, a small sample), the article says so.
• Every article shows its publication date and, when revised, the date it was updated.

• In a sentence or audio clip in the app: report the error inside the app.
• In a blog article or on a page of this site: email contato@dailybe.app with the link and the passage.

Corrections policy

When a mistake in an article or on a page is confirmed, we fix it within 30 days of being told. Corrections to articles get a dated update note.