ThetaWave vs AskSia
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ThetaWave
This AI-powered study assistant transforms various learning materials into structured notes, mind maps, flashcards, and quizzes. It helps users learn faster, understand deeper, and retain information longer through intelligent summarization and Q&A.
- Auto-structured AI notes from various content types
- AI-generated flashcards and quizzes
- Deep Q&A for concept clarification
- Mind map creation
- Progress tracking
- Spaced repetition for retention
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Transform Your Learning with ThetaWave – AI Study Notes ThetaWave is an all-in-one AI study assistant that transforms everything you learn into clear, structured, and deeply understandable AI notes. Whether you're studying from videos, audio recordings, PDFs, textbooks, screenshots, or web pages, ThetaWave turns your materials into organized notes, mind maps, flashcards, and quizzes — all inside one intelligent learning workspace. Powered by advanced AI reasoning, ThetaWave helps you learn faster, understand deeper, and retain information longer. Key Features: 1. Auto-Structured AI Notes Convert any content into clean, well-organized study notes in seconds. ThetaWave automatically extracts key points, sections, insights, and takeaways, so you can focus on learning instead of manual note-taking. - Works with video, audio, PDF, images, and text - Generates clear outlines, summaries, definitions, and examples - Highlights essential concepts automatically - Saves hours of rewriting and organizing Ideal for lectures, study sessions, research, and professional content. 2. Flashcards & Quizzes for Better Retention Reinforce what you learn with AI-generated flashcards and quizzes designed for long-term memory. - Automatic flashcard creation from your notes - Smart quizzes to test understanding - Spaced repetition to improve recall - Track your learning progress Perfect for exam preparation, revision, self-study, and continuous learning. 3. AI Summary & Deep Q&A Learn by interacting directly with your notes. - Ask questions and receive accurate, context-aware answers - Clarify difficult concepts - Explore deeper explanations - Compare ideas and analyze relationships - Review key topics quickly It’s like studying with an intelligent tutor, available anytime. Why Choose ThetaWave? - Learn faster with structured, high-quality AI notes - Understand better through reasoning-based AI - Remember more with flashcards and quizzes - Keep everything organized across subjects and formats - One workspace for studying, research, and knowledge building Whether you're a student, professional, researcher, or lifelong learner, ThetaWave helps you turn information into mastery. Built for Every Learning Scenario - University lectures and classroom learning - Online courses and self-guided study - Research papers, textbooks, and academic reading - Professional training and meeting notes - Language learning and personal projects Wherever knowledge is created, ThetaWave elevates it. Start Learning Smarter Today! Experience structured learning powered by AI. Experience ThetaWave. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
AskSia
This AI-powered study tool helps students upload readings, transcribe lectures, ask questions, and organize notes. It offers a free tier with limited features and multiple premium subscription plans for enhanced capabilities and unlimited processing.
- Upload readings and documents
- Transcribe lecture audio
- Ask AI questions about content
- Organize notes
- Unlimited AI assistance (premium)
- Document processing (premium)
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AskSia is your AI tutor and AI study assistant. Upload lecture recordings, PDFs, slides, photos and class notes, and Sia turns them into notes, flashcards, practice tests and a study plan from your own courses. Trusted by 2M+ students at 2,000+ universities. RECORD, TRANSCRIBE AND TRANSLATE YOUR LECTURE LIVE Fast professor? Heavy accent? Tap record and read every word as it is spoken, whether the lecture is in English, Korean, Japanese, Cantonese, Mandarin or Spanish, translated into your language in real time. Recording continues when your phone is locked, a floating window keeps the transcript in view, and you can ask Sia questions mid-lecture. When the lecture ends you get a summary and an outline. Built for lectures and coursework, not meetings. 30+ languages supported. ASK SIA ANYTHING ABOUT YOUR FILES OR AUDIO Upload up to 20 files at once: PDFs, Word documents, PowerPoint decks, Excel sheets, textbook chapters, audio files, YouTube links or photos. Ask a question and get an answer with citations that point to the exact page. Long readings become summaries with key points in your professor’s terms. LECTURE IN, NOTES OUT Any recording or file can become structured notes, a study guide, flashcards or a quiz, with spaced repetition built in so the cards you miss come back until you know them. Use the flashcard maker and quiz maker on one slide deck or a whole semester. PRACTICE BEFORE IT COUNTS Build timed practice tests and mock exams from your own course material, not from random question banks, with every miss explained. Use them for midterms, finals, college entrance and grad school exams. Preparing for a standardized test? Upload your prep materials and Sia turns them into practice sets and flashcards too. SIA SHOWS THE STEPS, NOT JUST THE ANSWER Snap a photo of a problem in math, physics, chemistry, biology, statistics, coding or engineering, or type it or say it out loud. Your AI tutor works through it step by step and explains the reasoning, not just the result. Ask why, ask again, or ask in your own language. KNOW WHAT TO REVIEW BEFORE THE EXAM Sia tracks what you get wrong across notes, flashcards and practice tests and tells you what to review next, so before an exam you know exactly what needs work. BRING YOUR WHOLE SEMESTER IN ONE CLICK Install the AskSia Chrome extension, import your courses from Canvas, Blackboard, Moodle or Brightspace, and your readings, slides and deadlines sync to the app. Sia builds a study plan from your syllabus that you follow on your phone. ANY FORMAT, EVERY DEVICE Photo, text and voice input. iPhone, iPad, Mac, Windows, web and Chrome extension, with your library, notes and chat history synced everywhere. FREE TO START • 300 minutes of transcription a month • 100 PDF pages a month PREMIUM PLANS PLUS, SUPER and A+ remove the limits. A+ includes the GPA Guarantee: use AskSia A+ for a full term and improve by at least one letter grade, or get 100% of your money back. Terms apply. A 3-day free trial is available on selected plans. Cancel anytime in the app. BUILT FOR • College and graduate students • High school students preparing for finals and entrance exams • International students studying in a second language • Anyone who learns faster with an AI tutor that explains AskSia is an AI study assistant that helps you understand your coursework rather than doing it for you: every answer comes with reasoning and citations. Contact: https://www.asksia.ai/contact-us Privacy: https://www.asksia.ai/policies/privacy Terms: https://www.asksia.ai/policies/termofuse
Screenshots
Verdict
The clearest difference is rating: ThetaWave at 4.6 against AskSia's 4.1. AskSia's advantage is ads (none vs shown) and review sentiment (83% vs 58%). On price, ratings volume, in-app purchases and monetization model there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. ThetaWave sells 10 in-app purchases, starting at $19.90 per month and AskSia sells 7 in-app purchases, starting at $5.99 per 7 days. Whichever you choose, the download price is not the number that matters.
ThetaWave holds the better App Store score, 4.6 against 4.1. Both are backed by a comparable volume of ratings — 51 and 62 respectively. Written reviews complicate that: 58% of ThetaWave's written reviews are positive against 83% of AskSia's, so the app with the better star average is not the one people write more warmly about.
ThetaWave ships an update fortnightly, AskSia weekly. The most recent releases landed on October 16, 2026 and October 17, 2026 respectively.
| Parameter | ThetaWave | AskSia |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (51 ratings) — better | 4.1 (62 ratings) |
| Positive reviews | 58.1% of reviews | 82.9% of reviews — better |
| Number of ratings | 51 | 62 — better |
| Update frequency | Fortnightly | Weekly — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.1 — better | 16.4 |
| Further details — not scored | ||
| Size | 101 MB | 69 MB |
| Age rating | 4+ | 12+ |
| Developer | Thetawave | ASKSIA INC |
Customer experience
ThetaWave
AskSia
In-app purchases
ThetaWave
- Plus$19.901 Month
- ThetaWave Pro Weekly3 Days trial$19.997 Days
- ThetaWave Pro Month$21.991 Month
Show 7 moreShow fewer
- Pro$24.991 Month
- Plus$38.903 Months
- ThetaWave Pro Quarterly$47.903 Months
- Pro$47.903 Months
- Pro$94.901 Year
- ThetaWave Pro Year$118.991 Year
- Pro$118.991 Year
AskSia
- AskSia - A+3 Days trial$5.997 Days
- AskSia - Plus1 Month trial$14.991 Month
- AskSia - Super$17.991 Month
Show 4 moreShow fewer
- AskSia - A+1 Month trial$29.991 Month
- AskSia - Plus$99.991 Year
- AskSia - Super$143.991 Year
- AskSia - A+$155.991 Year







