# Sleep Tech Audio Lectures vs RRT Flashcards

The clearest difference is price: RRT Flashcards at $14.99 against Sleep Tech Audio Lectures's $104.99. RRT Flashcards also leads on update cadence (every 3 weeks vs every 9 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Sleep Tech Audio Lectures costs $104.99 and RRT Flashcards $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Sleep Tech Audio Lectures ships an update every 9 months, RRT Flashcards every 3 weeks. The most recent releases landed on September 11, 2026 and May 17, 2026 respectively.

## The numbers

| Metric | Sleep Tech Audio Lectures | RRT Flashcards |
| --- | --- | --- |
| Price | $104.99 | **$14.99** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 3 weeks** |
| Size | 142 MB | 31 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 17+ |
| Developer | [RTS Publishing Co Inc](https://appshunter.io/developer/604916069) | [Dennis Stanley](https://appshunter.io/developer/1469290049) |

## What reviewers say

### Sleep Tech Audio Lectures

[App page](https://appshunter.io/ios/app/sleep-tech-audio-lectures/id6745153675)

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

**In-app purchases:** none


### RRT Flashcards

[App page](https://appshunter.io/ios/app/rrt-flashcards/id6749094847)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Sleep Tech Audio Lectures free?

Sleep Tech Audio Lectures costs $104.99, with no in-app purchases.

### Is RRT Flashcards free?

RRT Flashcards costs $14.99, with no in-app purchases.

### Do Sleep Tech Audio Lectures or RRT Flashcards have ads?

Neither Sleep Tech Audio Lectures nor RRT Flashcards shows ads.

### Which is updated more often, Sleep Tech Audio Lectures or RRT Flashcards?

Sleep Tech Audio Lectures ships an update every 9 months, and RRT Flashcards every 3 weeks. Most recently, Sleep Tech Audio Lectures was updated on September 11, 2026 and RRT Flashcards on May 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.*