# ThetaWave vs AskSia

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.

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.

## The numbers

| Metric | ThetaWave | AskSia |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (51 ratings)](https://appshunter.io/ios/app/thetawave-ai-study-notes/id6744060956/reviews)** | [4.1 (62 ratings)](https://appshunter.io/ios/app/asksia-ai-tutor-and-study-notes/id6746232496/reviews) |
| Number of ratings | 51 | **62** |
| Positive reviews | 58.1% of reviews | **82.9% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Fortnightly | **Weekly** |
| Monetization | Freemium | Free with in-app purchases |
| Size | 101 MB | 69 MB |
| Requires iOS | **15.1** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Thetawave](https://appshunter.io/developer/1805834893) | [ASKSIA INC](https://appshunter.io/developer/1815883382) |

## What reviewers say

### ThetaWave

[App page](https://appshunter.io/ios/app/thetawave-ai-study-notes/id6744060956)

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.

**Highlights:** 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

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Plus | $19.90 | per month |
| ThetaWave Pro Weekly | $19.99 | per 7 days |
| ThetaWave Pro Month | $21.99 | per month |
| Pro | $24.99 | per month |
| Plus | $38.90 | per 3 months |
| ThetaWave Pro Quarterly | $47.90 | per 3 months |
| Pro | $47.90 | per 3 months |
| Pro | $94.90 | per year |
| ThetaWave Pro Year | $118.99 | per year |
| Pro | $118.99 | per year |


### AskSia

[App page](https://appshunter.io/ios/app/asksia-ai-tutor-and-study-notes/id6746232496)

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.

**Highlights:** Upload readings and documents, Transcribe lecture audio, Ask AI questions about content, Organize notes, Unlimited AI assistance (premium), Document processing (premium)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| AskSia - A+ | $5.99 | per 7 days |
| AskSia - Plus | $14.99 | per month |
| AskSia - Super | $17.99 | per month |
| AskSia - A+ | $29.99 | per month |
| AskSia - Plus | $99.99 | per year |
| AskSia - Super | $143.99 | per year |
| AskSia - A+ | $155.99 | per year |


## Frequently asked questions

### Is ThetaWave free?

ThetaWave is free to download, with in-app purchases available.

### Is AskSia free?

AskSia is free to download, with in-app purchases available.

### Which has better reviews, ThetaWave or AskSia?

ThetaWave is rated higher. ThetaWave averages 4.6 out of 5 from 51 ratings, while AskSia averages 4.1 from 62 ratings.

### Do ThetaWave or AskSia have ads?

ThetaWave shows ads; AskSia does not.

### Which is updated more often, ThetaWave or AskSia?

ThetaWave ships an update fortnightly, and AskSia weekly. Most recently, ThetaWave was updated on October 16, 2026 and AskSia on October 17, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*