Indonesian is the easiest major language for an English speaker to start: the Latin alphabet, no tones, no cases, no genders, no verb conjugation and no plurals to form. iLexiBox spends the on-ramp on the small number of places where it is not obvious, and then gets you reading, because with Indonesian that happens quickly.
The Indonesian on-ramp is written by hand, not generated, and it is 192 cards long. Every card is spoken in a recorded Indonesian voice, and what you get right is scheduled for review rather than shown again at random.
Three of the pronunciation cards, exactly as the course teaches them:
Once you are reading, the level is the point. The Text Generator writes Indonesian at the CEFR level, length, topic and format you ask for, so the step up is a setting rather than a new book. Speaking scores you word by word as you read aloud. The Conversation Partner talks back. The Translator explains a sentence instead of replacing it, and the Corrector marks what you wrote and says why.
Above the on-ramp sits the Path — a station map from A1 to C2 with grammar, vocabulary and checkpoint stations — and Words & Notes, where everything you save comes back on a spaced-repetition schedule in seven quiz styles.
The album is a photograph for every word, shelved by category, each caption written in Indonesian and spoken in a real recorded voice rather than synthesised on the fly. It doubles as a game: see the picture, spell the word. Free to replay.
There is essentially one hard thing, and it is the letter e, which is either a quick uh or a clear eh with nothing in the spelling to say which — sepeda has one of each. The course handles it the only honest way, by teaching each word with its vowel and giving the rough guides that cover most cases. Below that: stress is a light lift on the second-to-last syllable, sliding to the last if that one holds a schwa; and ng is a single sound that Indonesian is happy to begin a word with, which English never does. All three are recorded.