Portuguese Phrase
Qual app eu devo usar?
Meaning
A direct question asking for a recommendation about which application the speaker should choose. It is informal and commonly used when discussing smartphones, tablets, or computers.
When to use
Use this phrase when you need advice on selecting a mobile or desktop app—whether it’s for language learning, photo editing, finance, or any other purpose. It works well in casual conversation with friends, colleagues, or online forums.
✦Grammar Breakdown
Qualappeudevousar?
Qual (interrogative adjective)
Used to ask 'which' and agrees in gender and number with the noun it modifies.
app (loanword)
Short for 'aplicativo'; in Brazilian Portuguese it is masculine (o app) but can be treated as feminine in some regions.
eu (personal pronoun)
First‑person singular pronoun, often omitted in informal speech.
devo (verbo dever)
First‑person singular present of 'dever' meaning 'should' or 'must'.
usar (infinitivo)
Infinitive verb meaning 'to use'. It follows the modal verb 'dever'.
🗨In Conversation
Qual app eu devo usar para aprender português?
Which app should I use to learn Portuguese?
Eu recomendo o Speeek; ele foca muito na prática oral.
I recommend Speeek; it focuses a lot on speaking practice.
✕Common Mistakes
Que app eu devo usar?
While understandable, 'Que' is less natural for asking 'which' in this construction; 'Qual' is the standard interrogative adjective.
Qual app devo usar?
Omitting the subject pronoun 'eu' is acceptable in spoken Portuguese, but for learners the full form clarifies the sentence structure.
Qual app eu devo usar o?
The article 'o' after 'usar' is unnecessary; the verb already takes the direct object without an extra article.
↔Alternatives
Qual aplicativo eu devo usar?
Which application should I use?
Que app eu devo usar?
What app should I use?
Qual app é melhor para mim?
Which app is better for me?
Cultural Tip
In Brazil, 'app' is a very common, informal way to refer to any software application, especially on smartphones. In more formal writing or when speaking with older generations, 'aplicativo' is preferred. Also, the verb 'dever' conveys a polite suggestion rather than a strong obligation.