LingFit review: Course up to B2, AI chapters, YouTube feed, and games with friends
The language app LingFit bundles an A1-to-B2 course, AI-generated chapters, a video feed, and three games with friends. What the app delivers and where it ends.
LingFit, the language-learning app from ThreeFlavors LLC, combines six components in one subscription: a structured course from A1 to B2, AI-built chapters on freely chosen topics, a feed of real YouTube videos, grammar classes, reading texts in simple language, and three games with friends. The app runs on iPhone, iPad, and Android. Its strength is personalization; its clear limit is level B2.
What LingFit is
According to the manufacturer, LingFit covers 42 language pairs. The source languages are English, German, French, and Spanish. English, German, and French speakers can each learn twelve languages, including Danish, Hungarian, Czech, and Turkish. Spanish speakers have six options: English, French, German, Italian, Portuguese, and Danish. The app interface is translated into 43 languages.
The manufacturer’s claim: each course is built for its respective source language and not merely translated from English. So German speakers learn Italian with explanations in German. With many competitors, English is the only source language for smaller languages.
Fitty Fox, a fully 3D-rendered fox with animated fur, guides users through the app. Other characters appear in lessons, breaks, and celebrations.
The main course
The course follows a chapter, level, lesson structure. For each language pair, there are 60 chapters with eight levels of ten lessons each, for a total of 4,800 lessons. In content, it ranges from A1 to B2 according to the Common European Framework of Reference for Languages (CEFR).
A lesson mixes up to twelve exercise formats:
- Swipeable vocabulary cards, where missed cards come back
- Image-to-word matching and timed matching, including by ear
- Listening comprehension for individual words and full sentences
- Sentence building with word tiles and word building letter by letter
- Fill-in-the-blank texts, dialogue building, and reading texts with a comprehension question
- a speaking exercise in which recognized words light up green
At the halfway point of a lesson, a short break appears with a mascot joke. At the end, a review round (“Let’s improve!”) follows with the words that were answered incorrectly.
AI packs: the differentiator
The feature the manufacturer itself calls its most distinctive is called “Extra Packs” on the website. Users enter any topic, such as “job interview in Spanish” or “nursing in a German hospital.” Alternatively, they bring 1 to 20 of their own words: typed, chosen from saved words, or via a photo of a vocabulary list, book page, or menu.
The AI suggests a word list that can be edited before creation. From that, a complete chapter is generated with the same exercise formats, audio, and images as in the main course. It lands in the “Yours” tab. One pack costs one credit. Every new account gets one free credit; purchased credits do not expire, according to the manufacturer. If generation fails, the credit is automatically refunded.
After an automatic safety check, packs can be shared publicly. Other learners can search, save, and like them.
Video feed and interactive words
The feed works like a short-video app: swipe up for the next video. It shows real YouTube videos in the target language, sorted by CEFR level. A tap on a subtitle word opens the translation, and the video automatically pauses for that time. Speed can be set to 1×, 0.75×, or 0.5×. There is also a search slider, adjustable subtitle size, and a list of saved videos. Topic categories such as sports, travel, or science are available only for English speakers; other language pairs get a mixed feed.
Every foreign word in the app is tappable: in lessons, articles, grammar classes, and subtitles. The tooltip shows multiple translations, the base form (“gehst” becomes “gehen”), audio with a slow button, an AI explanation, and a bookmark. Saved words, up to 2,000 per learner, can be practiced as cards or turned into a custom chapter in groups of up to 20.
Games with friends
Three game modes rely on social motivation, each with real exercises:
| Game | Principle |
|---|---|
| Flash | Daily quick challenge at a changing time; under 3 minutes +10 points, under 10 minutes +5, under an hour +3, after that +1 |
| Ping Pong | 1-on-1 duel with mutually following friends; each move has a 12-hour deadline, and whoever misses it loses |
| Tug of War | Multiple friends; whoever has a lead of 20, 50, or 100 exercises wins |
There are also activity charts comparing with friends, milestones, and “nudges,” or reminders to friends who have not practiced yet.
Other features
Grammar classes each explain one rule and offer a matching practice chapter with “Practice Now.” Reading texts in simple language appear in fictional fox newspapers such as “The Washington Paw” or “The Daily Tail,” with audio per sentence. Chapters can be downloaded and studied offline, and progress syncs later. A widget shows the streak on the home screen. The app’s tone adapts to the age selected during setup: more playful under 35, calmer from 35 on.
Pricing
LingFit is a subscription service. The manufacturer cites about US$40 per year for the annual subscription. According to the US App Store, Premium cost $12.99 per month or $44.99 per year on October 10, 2026. The annual subscription starts with a seven-day trial; the app reminds users three days before it ends. Pack credits are purchased separately. Prices can vary by store, country, and date.
Gaps and limits
- No level above B2: LingFit does not offer C1 or C2 content.
- Limited language selection: Asian languages, Russian, and Arabic are missing, as is Italian as a source language.
- No teachers: There are neither tutors nor conversation partners. The social aspect is limited to friends, games, and public packs.
- No browser learning: The website is only for purchases and gift cards.
- Speech recognition only in lessons: There is no speaking exercise in the video feed.
A note for context: The manufacturer does not promise that someone will reach a certain level with LingFit. The terms of use explicitly exclude such a guarantee.
More information is available on the official website lingfit.app.
The bottom line
LingFit is a broad language app for learners who do not want to follow only a fixed curriculum. The combination of a course, AI chapters on custom topics, and a video feed with tappable subtitles is unusual, as are the native courses for German, French, and Spanish speakers. Those who want to go beyond B2, are looking for a language outside the 13 offered, or need instruction with people will have to look elsewhere.