Why the star rating alone is the wrong signal
Here's the first thing that jumps out once you look past the number on the store listing: the same app can sit at roughly 4.7 stars on the App Store and land somewhere far lower on a site like Trustpilot. That's not a contradiction — it's two different questions being answered by two different crowds. App Store reviews skew toward people mid-lesson, in a good mood, tapping five stars because the streak animation just made them smile. Trustpilot reviews skew toward people who had a specific, often billing-related problem and went looking for somewhere to say so. Neither number is "the truth" on its own — you have to read what's actually being said underneath both.
Duolingo: brilliant at the habit, honest about its own ceiling
Duolingo's ratings are genuinely enormous — tens of millions of reviews averaging around 4.7 stars, which is a real achievement for any app. Reviewers consistently praise the same thing: it makes showing up every day effortless, in a way almost nothing else does. That's not nothing. Habit is most of the battle in language learning, and Duolingo has cracked it better than anyone.
But read past the five-star reviews and a specific complaint repeats constantly: lessons feel thin once you're past the basics, grammar gets little real explanation, and a lot of users describe being able to pass an exercise by pattern-matching the shape of the sentence rather than actually knowing the language. The 2025 switch from hearts to an energy system added a second recurring frustration — nearly half of a large community poll said they actively disliked it — and a steady stream of complaints about subscription billing and thin customer support shows up wherever people go specifically to complain, like Trustpilot. If Mandarin is the language in question, there's a Taiwan-specific gap too: Duolingo's one Chinese course teaches Simplified characters and Pinyin only, with no Zhuyin option at all.
HelloChinese: the content wins people over, the paywall loses them
HelloChinese is, by the numbers, one of the best-reviewed apps in this whole space — north of 4.8 stars on both the App Store and Google Play, the latter across hundreds of thousands of ratings. The praise is consistent and specific: real sentence-level grammar explanations, native narration, and a structure that reviewers describe as the easiest they've found for actually starting to read and speak, not just recognize words.
The complaint that shows up over and over, though, is about money, not teaching: several reviewers describe the free tier running out with no clear warning, followed by a subscription prompt that felt like it arrived without being told the rules upfront. A well-liked product with a paywall people feel ambushed by is a very specific — and very common — failure mode, and it's worth knowing before you're three lessons deep. (If Taiwan specifically is your goal, there's a separate, quieter gap: nothing in HelloChinese's own marketing confirms it teaches Traditional characters or Zhuyin.)
Pimsleur: the app people love, then dread canceling
Pimsleur's audio-first method — repeat what you hear, no textbook, build the ear before the eye — earns some of the most genuinely enthusiastic reviews of any app here, and its store ratings (around 4.7 on the App Store, 4.3 on Google Play) back that up. People who like Pimsleur really like it, especially for pronunciation.
The complaints cluster in two places, and neither is about the teaching itself. First, price: Pimsleur has historically sat well above competitors, and while its newer subscription tiers are viewed as better value than the old per-course pricing, "expensive" is still a frequent word in the reviews. Second, and more pointed: multiple reviewers describe canceling a subscription as far harder than starting one, alongside complaints about slow customer service and limited payment options. A great product with a frustrating exit door is exactly the kind of thing a star rating alone won't warn you about.
Rosetta Stone: trusted for accent, fought over everything else
Rosetta Stone's reputation for pronunciation and accent training is one of the more consistent threads across every source we checked — reviewers specifically mention getting complimented on their accent after using it. That's a real, earned strength.
It's also the app with the most polarized reviews here: on Trustpilot, a meaningful share of ratings sit at "poor" or "bad" alongside a similarly sized "excellent" camp. The specific complaints are concrete rather than vague: speech recognition described as strict enough to block a learner from finishing a lesson even when a tone was pronounced correctly, a picture-based teaching method some reviewers find too ambiguous to confirm what a word actually means, and frustration over the shift from a one-time purchase to an ongoing subscription. One reviewer's comparison — learning roughly a quarter as much as with a different program in the same amount of time — is a striking outlier, but it's not an isolated sentiment in the methodology complaints.
The one complaint every single app shares
Here's the pattern that doesn't show up in any of these apps' own marketing: every single one of them, regardless of price or teaching philosophy, draws the same two complaints in some form. First, a monetization friction point — a paywall that arrives with no warning, a cancellation flow that's harder than it should be, a price that feels steep for what's delivered. Second, a depth ceiling — pronunciation without clear meaning, vocabulary without real conversation, gamification without the ability to actually produce the language under pressure. Different apps land differently on each axis, but none of the four fully escapes both. That's worth remembering the next time a 4.8-star badge is doing the talking for an app you haven't tried yet.
Where that leaves a decision
None of this means any of these four apps are bad — three of them are genuinely well-reviewed, popular tools that work for a lot of people, which is exactly why their complaints are worth reading carefully rather than dismissing. What it does mean is that the questions worth asking before you commit are specific ones: what happens when the free tier runs out, how hard is it to leave, and will this actually get you producing the language or just recognizing it. CiaoSpeak is still pre-launch, so it has no reviews of its own yet to weigh against these — what we can tell you is what we've deliberately built around avoiding: real conversation practice designed to push you to produce Mandarin rather than pattern-match it (see how AI conversation practice actually helps), and vocabulary built for Taiwan specifically rather than bolted on as an afterthought. See our complete beginner's guide to learning Chinese for the full path, or the FAQ for more on how CiaoSpeak works.
Frequently asked questions
Is Duolingo good for learning Chinese?
Reviewers consistently credit Duolingo for making a daily habit easy to keep, but the recurring complaint — echoed across App Store, Google Play, and Trustpilot reviews — is that the lessons stay shallow: enough to pattern-match an exercise, not enough to actually produce the language yourself.
What's the biggest complaint about HelloChinese?
Reviewers who like the actual teaching content (which is most of them — it holds a very high average rating) most commonly complain about the paywall: several report no clear warning about how much is free before a subscription is required.
Is Pimsleur worth the price?
Its audio-first pronunciation method gets consistently strong reviews, and app-store ratings are high. The price is the recurring sticking point — historically one of the more expensive options — alongside reports that canceling a subscription isn't as easy as starting one.
Does Rosetta Stone actually work for Chinese?
Reviewers give it real credit for pronunciation and accent training. The most common complaint is the opposite problem: speech-recognition scoring reported as strict enough to block progress even when a tone was said correctly, plus a teaching style some find too vague on what a word actually means.