Another group mate agreed with him and said, ”Duo tries to include too many language aspects: listening, writing and speaking. Another groupmate agreed with him and said, ”Duo tries to include too many language aspects: listening, writing and speaking.

Another group matepeer agreed with him and said, ”Duo tries to include too many language aspects: listening, writing, and speaking. Another peer agreed with him and said, ”Duo tries to include too many language aspects: listening, writing, and speaking.

Another group mateember agreed with him and said ”Duo tries to include too many aspects of language aspects: listening, writing and speaking. Another group member agreed with him and said ”Duo tries to include too many aspects of language: listening, writing and speaking.

But we gothave good alternatives for each of the aspects.” I disagreed with them because it should notDuolingo does not have to be perfect. But we have good alternatives for each aspect.” I disagreed with them because Duolingo does not have to be perfect.

But we gothave good alternatives for each of the aspects.” I disagreed with them because it shoulneed not be perfect. But we have good alternatives for each aspects.” I disagreed with them because it need not be perfect.

"should not be perfect" would imply being perfect would be bad. "need not be perfect" just says being perfect isn't required

Duo is a game -, yes, and ithat’s a perk. Duo is a game, yes, and that’s a perk.

Duo is a game - yes andand yes it’s a perk. Duo is a game - and yes it’s a perk.

Duo is a game - yes and ithat’s a perk. Duo is a game - yes and that’s a perk.

And it’s pretty simple game that is easy for me to spend just 15 minutes a day for a gameon. And it’s pretty simple game that is easy for me to spend just 15 minutes on.

Some English speakers will say it’s bad to end a sentence with a preposition, like I do here, but most English speakers don’t care!

And it’s pretty simple for me to spend just 15 minutes a day foron a game. And it’s pretty simple for me to spend just 15 minutes a day on a game.

Other aspects of language isare important -: listening to podcasts or movies iscan be a base of understanding and improvement. Other aspects of language are important: listening to podcasts or movies can be a base of understanding and improvement.

Other aspects of language isare important - listening to podcasts or movies is a base of understanding and improvement. Other aspects of language are important - listening to podcasts or movies is a base of understanding and improvement.

Other aspects of language isare important - listening to podcasts or movies is a base of understanding and improvement. Other aspects of language are important - listening to podcasts or movies is a base of understanding and improvement.

"aspects" is plural, so "is" should be "are"

But iI believe that the gamification and repetitivenesson of mobile apps is important . But I believe that the gamification and repetition of mobile apps is important.

The word “repetitiveness” has connotations of boredom or annoyance.

But iI believe that the gamification and repetitiveness of mobile apps is important . But I believe that the gamification and repetitiveness of mobile apps is important.

But iI believe that the gamification and repetitiveness of mobile apps is important . But I believe that the gamification and repetitiveness of mobile apps is important .

At least it works withDuolingo works for me and my ADHD brain, at least. Duolingo works for me and my ADHD brain, at least.

At least it works with my ADHD brain. At least it works with my ADHD brain.

A friend of mine said, “Duo can’t teach you a language, i. It’s just a game whichthat shows you a picture and words”.” A friend of mine said, “Duo can’t teach you a language. It’s just a game that shows you a picture and words.”

Relative pronouns are difficult even for lifelong English speakers. I believe we use “which” when we’ve already mentioned multiple things and we want to discern between them.

A friend of mine said, “Duo can’t teach you a language, it’s just a game whichthat shows you a pictures and words”. A friend of mine said, “Duo can’t teach you a language, it’s just a game that shows you pictures and words”.