Brilliant vs Call Annie
Side-by-side comparison of features, pricing, and ratings
At a glance
| Dimension | Brilliant | Call Annie |
|---|---|---|
| Pricing | Freemium (free limited lessons; Premium ~$24/mo or ~$173/yr) | Freemium (free basic access; Pro ~$15/mo, now discontinued) |
| Primary Focus | Interactive STEM learning (math, coding, science) | Video-call spoken fluency practice (7 languages) |
| AI Tutor | Koji: adaptive, generates problems, tracks mastery | AI tutor via video call for pronunciation & conversation |
| Platform | Web + mobile app (iOS/Android) | Mobile app (iOS/Android) – discontinued |
| Active Support | Actively developed and updated | Discontinued; no updates or bug fixes |
| Best For | Students 5th-12th grade & lifelong STEM learners | Existing users who already have the app installed |
Brilliant is the clear choice if you want an actively supported, interactive STEM tutor that adapts to your knowledge gaps. Call Annie, though innovative for language learning, is a discontinued app and not recommended for new users. For language learners, look elsewhere; for math, science, or coding, Brilliant delivers hands-on problem-solving with real-time feedback.
What real users say: Brilliant vs Call Annie
Not marketing copy and not our opinion — a structured sweep of public discussion (reviews, forums, communities and video comments), showing what people praise and what they complain about for each tool.
Brilliant
87 mentions across 6 sources · 21% positive — critical
Hacker News, Product Hunt, App Store, Stack Overflow, GitHub, Lemmy
What users praise
- • Interactive, visual problem-solving makes STEM concepts intuitive and fun
- • AI tutor Koji adapts to knowledge level and provides guided hints
- • Bite-sized lessons with instant feedback keep learning momentum
- • Gamified streaks and XP system motivates daily practice
What frustrates them
- • Free tier limits to only 2 lessons per day after first week
- • $20/month subscription is expensive for casual learners
- • Instructions are often unclear, even for STEM graduates
- • App occasionally suffers from slow loading times
Researched Jul 2, 2026
Call Annie
62 mentions across 4 sources · 18% positive — critical
Hacker News, YouTube, Bluesky, Lemmy
What users praise
- • Purpose-built for language acquisition with video-call tutors.
- • Supported 7 languages: English, Spanish, French, German, Japanese, Mandarin, Korean.
- • Backed by academic studies (RELC Journal 2025).
- • Over 1 million learners used the app.
What frustrates them
- • App is discontinued with no support or updates.
- • Avatar design described as 'freaky AI slop' by users.
- • No bug fixes; existing app may break over time.
- • Removed from app stores; cannot be downloaded.
Researched Jul 26, 2026
Feature-by-feature
Brilliant and Call Annie serve fundamentally different domains. Brilliant specializes in interactive STEM learning with its AI tutor Koji, which generates visual problems, adapts to individual knowledge, and provides guided hints and spaced repetition. Subjects include arithmetic, algebra, calculus, probability, statistics, Python, neural networks, and data analysis. The platform features progress tracking with streaks and levels, and is built by learning experts from MIT, Harvard, and Stanford. Call Annie, on the other hand, focused on language acquisition through video-call AI tutors, covering English, Spanish, French, German, Japanese, Mandarin, and Korean. It offered live pronunciation checks, personalized plans, vocabulary games, and real-time speaking feedback. However, the app has been discontinued, meaning no new features, updates, or bug fixes. Brilliant remains actively developed and is more suitable for structured STEM learning, while Call Annie is only usable by those who already have the app installed.
Pricing compared
Both tools operate on a freemium model, but their current status differs drastically. Brilliant offers free limited lessons and a Premium subscription around $24/month or $173/year. The Premium unlocks full lessons, adaptive practice, and the Koji AI tutor. Call Annie also had a freemium model with a Pro tier at approximately $15/month, but since the app is discontinued, no new subscriptions can be purchased. Existing Pro users may still access features, but there is no ongoing support. For new learners, Brilliant is the only viable option among the two.
Who should pick which
- Student (grades 5-12) struggling with mathPick: Brilliant
Brilliant’s interactive problem-solving and Koji AI adapt to weak areas, making math engaging and building intuition.
- Adult learning Python from scratchPick: Brilliant
Brilliant offers structured, hands-on lessons in Python programming with instant feedback, ideal for active learners.
- Language learner wanting spoken fluency practicePick: Call Annie
Call Annie was built for this, but only if you already have the app; new users should seek alternatives.
- Homeschooler seeking STEM curriculumPick: Brilliant
Brilliant’s curated learning paths and adaptive practice provide a structured, accredited supplement for math, science, and coding.
- Researcher studying AI in language educationPick: Call Annie
Call Annie has published studies (RELC Journal 2025) that could be referenced, though the app itself is no longer supported.
Frequently Asked Questions
Brilliant vs Call Annie: which should you choose?
Brilliant is the clear choice if you want an actively supported, interactive STEM tutor that adapts to your knowledge gaps. Call Annie, though innovative for language learning, is a discontinued app and not recommended for new users. For language learners, look elsewhere; for math, science, or coding, Brilliant delivers hands-on problem-solving with real-time feedback.
Is Brilliant suitable for college-level learners?
Yes, Brilliant covers advanced topics like calculus, linear algebra, statistics, and neural networks, but is best for building intuition rather than a full degree.
Can I still download Call Annie?
No, the app has been discontinued and is likely not available for download from official stores.
Does Brilliant offer a certificate?
Brilliant is WASC accredited as a supplementary program, but it is not a degree-granting institution.
What languages does Brilliant support for instruction?
Brilliant primarily delivers content in English; language selection is not mentioned in the provided data.
Can Call Annie help with grammar or writing?
No, Call Annie focused on spoken fluency and pronunciation, not grammar or writing skills.
Is there a free trial for Brilliant Premium?
Brilliant offers free limited lessons; the specific free trial duration is not stated in the provided info.
Does Brilliant have a mobile app?
Yes, Brilliant has mobile apps for iOS and Android for learning on the go.
Who created Brilliant?
Brilliant was built by learning experts from MIT, Harvard, and Stanford, as stated in the data.
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Last reviewed: July 30, 2026