Thai Alphabet App: How to Learn All 44 Consonants Without Forgetting Them

A Thai alphabet app earns its place on your phone by doing two things a printed chart cannot: it teaches the three consonant classes as you meet each letter, and it brings every letter back right before you forget it. Read Thai is built around both of those. Here is what that looks like in practice, and how to judge any alphabet app against it — including the flashcard decks and general language apps people reach for first.

Why a chart is not enough

A wall chart of the 44 Thai consonants is a fine reference and a poor teacher. It shows you the shapes side by side, which is exactly the layout your memory is worst at holding onto — nothing about ก tells you it differs from ถ until you’ve mixed them up a few times and paid for it with a misread word. A chart also has no opinion about which letters matter most: it gives the rare ฌ the same visual weight as the everyday ก, so a learner working straight through it in alphabetical order spends real time on letters they’ll barely meet.

What a chart can’t do at all is bring a letter back to you. You look at it once, move down the row, and the letter you saw three rows ago starts fading immediately — that’s just how memory for unfamiliar shapes works. An app can decide when you’re about to forget ค and put it back in front of you at exactly that moment. A printed page can’t.

The three consonant classes, in one paragraph

Thai’s 44 consonant letters cover only 21 consonant sounds, and the reason for the extras is tone. Every consonant belongs to one of three classes — high, mid, or low — and that class, combined with the vowel and any tone mark, is what tells you how a syllable is pronounced. Two letters can make the same sound and still produce different tones, because they sit in different classes. Skip the classes and you’re stuck memorising the tone of every word one at a time, forever; learn them and you can predict the tone of a word you’ve never seen.

What a good alphabet app does on day one

The first session with any alphabet app should get you reading something, not just recognising shapes in isolation. That means starting with a small, high-frequency set of consonants and the plainest vowels, then putting them together into real syllables immediately — not after finishing all 44 letters first. It also means naming the consonant class the moment a letter is introduced, so “this is ก” and “ก is a mid-class consonant” arrive together instead of the second fact showing up as a surprise weeks later.

Spaced repetition: the part most apps skip

Spaced repetition — showing you a letter again right as you’re about to forget it, rather than on a fixed daily list — is the single biggest lever for whether an alphabet actually sticks. It’s also the part a static chart, a one-off video, or a deck you built yourself and never scheduled properly can’t give you. The scheduling has to adapt: a letter you keep getting right should show up less; one you keep missing should come back sooner.

How Read Thai compares with flashcard apps and Duolingo-style apps

Anki ships no built-in Thai course at all — it’s a blank flashcard engine, and its own site tells new users to “create a new deck and add some flashcards to get started.” That’s a real option if you’re willing to build the deck, tag each card’s consonant class yourself, and keep the scheduling honest, but it hands you the raw materials, not the course. Duolingo doesn’t offer a Thai course as of 2026, so it isn’t part of this comparison at all. Ling teaches Thai alongside many other languages, with native-speaker audio and a course description that mentions covering consonant classes and tone rules inside its grammar notes — useful if you want Thai as one of several languages in the same app, alongside conversation practice.

Read Thai does one thing: it teaches you to read Thai, starting from the consonant classes and building to full tone prediction, with spaced repetition scheduling every letter and word for you automatically. The first three of its eleven modules are free, no card required, so you can compare it against whatever you’re using now before deciding.

The first three letters to learn today

Start with ก, จ and บ — all mid class and all common. Learn each one’s shape, its class, and one word that uses it, in that order, and you’ll be reading your first real syllable before the session ends. From there, add the rest of the mid class before moving to high and low — the order a chart never tells you, but a course built around consonant classes gets right from the start.