# ThetaWave vs PromptDeck

The clearest difference is price: ThetaWave at Free against PromptDeck's $9.99. ThetaWave also leads on iOS requirement (15.1 vs 18.6). PromptDeck's advantage is in-app purchases (none vs 10). On update cadence, ads and device support there is nothing between them.

ThetaWave is free to download; PromptDeck costs $9.99 up front. ThetaWave sells 10 in-app purchases, starting at $19.90 per month. PromptDeck asks for nothing beyond the download.

ThetaWave ships an update fortnightly, PromptDeck every 8 days. The most recent releases landed on October 30, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | ThetaWave | PromptDeck |
| --- | --- | --- |
| Price | **Free** | $9.99 |
| Rating | **[4.6 (51 ratings)](https://appshunter.io/ios/app/thetawave-ai-study-notes/id6744060956/reviews)** | — |
| Number of ratings | **51** | — |
| Positive reviews | 54.5% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Fortnightly | **Every 8 days** |
| Monetization | Free with in-app purchases | — |
| Size | 102 MB | 11 MB |
| Requires iOS | **15.1** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Thetawave](https://appshunter.io/developer/1805834893) | [HIU WAI LIN](https://appshunter.io/developer/1368309222) |

## 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 capabilities.

**Highlights:** Auto-structured AI notes, Flashcards and quizzes, AI summary and deep Q&A, Mind map generation, Progress tracking, Supports video, audio, PDF, images, and text

**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 |


### PromptDeck

[App page](https://appshunter.io/ios/app/promptdeck-ai/id6755722727)

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

**In-app purchases:** none


## Frequently asked questions

### Is ThetaWave free?

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

### Is PromptDeck free?

PromptDeck costs $9.99, with no in-app purchases.

### Do ThetaWave or PromptDeck have ads?

Both ThetaWave and PromptDeck show ads.

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

ThetaWave ships an update fortnightly, and PromptDeck every 8 days. Most recently, ThetaWave was updated on October 30, 2026 and PromptDeck on September 15, 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.*