Honest comparison · 2026

The best Thai learning app in 2026

Thai is not a normal language — a normal language app will not suffice. We compare Pasaa, Duolingo, Pimsleur and Anki on the criteria that truly matter for Thai.

Why a normal language app is not enough for Thai

Most language apps are built for major European languages — French, Spanish, German, Italian. Those languages share an alphabet with English. They have cognates. They have a similar grammatical structure. An app like Duolingo can work quite well for those languages: recognising words, building sentences, gamification for motivation.

Thai is fundamentally different. Three problems make generic language apps unsuitable:

Problem 1: Tones require audio and feedback

A language app that only shows how a word is pronounced is not enough. You also need to find out whether you are saying it that way. That means recording your own voice and seeing the shape you produced next to the tone you meant. Without that, it is impossible to know whether your tone says "máa" or "mǎa" — and that difference is the difference between "horse" and "dog".

Problem 2: Thai script needs its own approach

The Thai script is not something you learn "on the side" by seeing words a few times. It has a systematic structure: consonant classes, vowel positions, tone rules. An app that only shows words in romanization — or introduces the script late — creates a dependency that is hard to break.

Problem 3: Thai has zero cognates with English

When learning French you recognise hundreds of words on day 1: restaurant, hotel, normal, possible. With Thai you recognise zero words. Not a single one. Everything must be built from zero, which places higher demands on the method of vocabulary building and repetition.

Comparison: Pasaa vs Duolingo vs Pimsleur vs Anki

Criterion	Pasaa	Duolingo	Pimsleur	Anki
Feedback on your own tones (pitch contour)	✓	✗	✗	✗
Thai script (not just romanization)	✓	✗	✗	self-configure
FSRS spaced repetition	✓	✗	✗	✓
Structured curriculum for Thai	✓	✗	✓	✗
Free to start	✓	✓	✗	✓
Audio on nearly every word (0.5× and 0.75× slow playback)	✓	✗	✓	deck-dependent
Formal/informal marking on words and sentences	✓	✗	✗	✗

Per app: honest verdict

Duolingo

No Thai course · Good for the languages it does teach

Duolingo has no Thai course, and never has — it is among the most requested languages on its forums and has never been announced. The gamification and daily reminders work well for the languages it does teach, so keep it for those. For Thai there is nothing to weigh up: the comparison below is between the apps that actually offer it.

Pimsleur

Good audio · No script · Expensive

Pimsleur is a respected audio method with good pronunciation guidance and a well-designed spaced repetition system for spoken vocabulary. For Thai, however, the approach is incomplete: the script is entirely ignored. Anyone using Pimsleur learns to speak — but not to read or write. Moreover, the subscription is expensive for what you get. Valuable as a supplement to a script-based method; insufficient as the only method.

Anki

Powerful repetition system · No structure · DIY

Anki is the most powerful spaced repetition system available — and it is free on desktop. With a good Thai deck (such as those from community members on AnkiWeb) you can effectively build vocabulary. But Anki does nothing with tones, nothing with pronunciation analysis, nothing with structure. You have to assemble and organise everything yourself. For a beginner that is a high barrier; for an advanced learner, Anki is an excellent supplement.

Pasaa

Built specifically for Thai · Tone drills · Full script · FSRS

Pasaa is the only app in this comparison built with Thai as the starting point — not as a byproduct of a European language method. Tone drills train your ear from the first lessons, and in the tone and culture lessons you can record yourself and see your own pitch line over the five tone shapes. The Thai script is present from lesson 1, alongside the romanization, so you learn both in parallel. FSRS repetition schedules every word you learn. And the curriculum has a deliberate progression, from tones and basic vocabulary (Phase 1) to everyday situations and registers (Track 1). The first 16 lessons of Track 1 are free, plus the first 3 script lessons.

What does a Thai learning app really need?

Based on the specific challenges of Thai, there are five criteria that every serious Thai learning app should meet:

Feedback on your own tones

Playing audio is not enough: you have to find out what your own voice is doing. That means recording yourself and seeing the shape you produced next to the tone you were aiming for. Without that you never know whether your tone says "máa" or "mǎa" — and that difference is the difference between "horse" and "dog".

Thai script from day 1

The script introduces tonal information via consonant classes. Anyone who only starts learning the script after weeks or months has romanization as their primary frame of reference — a habit that is hard to break.

FSRS or comparable spaced repetition

With zero cognates and five tones per word, learning Thai needs a robust repetition system. FSRS (Free Spaced Repetition Scheduler) is scientifically validated as the most efficient approach for long-term vocabulary retention.

Structured curriculum specifically for Thai

The order in which you learn Thai matters. Tones before vocabulary. Basic grammar before complex sentences. Mid-class consonants before high-class. An app without structure forces you to navigate a complex system yourself.

Thai has formal, informal and neutral registers that differ greatly from each other. Learning a sentence without knowing when to use it is risky — you can unintentionally sound impolite or unnatural. Anything that is formal or informal should say so where you learn it.

19 lessons free.
No credit card.

Tones, sounds & basic grammar free · Upgrade when you're ready

Start for free →