# Quick Stochastics PRO vs ReadBay

The clearest difference is price: ReadBay at Free against Quick Stochastics PRO's $1.99. ReadBay also leads on update cadence (every 10 days vs every 4 weeks). Quick Stochastics PRO's advantage is in-app purchases (none vs 4). On ads, device support and iOS requirement there is nothing between them.

ReadBay is free to download; Quick Stochastics PRO costs $1.99 up front. ReadBay sells 4 in-app purchases, starting at $4.99 per month. Quick Stochastics PRO asks for nothing beyond the download.

Quick Stochastics PRO ships an update every 4 weeks, ReadBay every 10 days. The most recent releases landed on October 25, 2026 and October 23, 2026 respectively.

## The numbers

| Metric | Quick Stochastics PRO | ReadBay |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | — | **[4.8 (239 ratings)](https://appshunter.io/ios/app/readbay-book-summaries/id6499073338/reviews)** |
| Number of ratings | — | **239** |
| Positive reviews | — | 84.5% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Every 10 days** |
| Monetization | — | Free with in-app purchases |
| Size | 179 MB | 60 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Glindemann, Sennoun, Langer GbR](https://appshunter.io/developer/1024972809) | [Bange Sabastine Hwonyi](https://appshunter.io/developer/1708740698) |

## What reviewers say

### Quick Stochastics PRO

[App page](https://appshunter.io/ios/app/quick-stochastics-pro/id6472449362)

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

**In-app purchases:** none


### ReadBay

[App page](https://appshunter.io/ios/app/readbay-book-summaries/id6499073338)

Access concise summaries and audio versions of bestselling books in under 15 minutes. Master key insights from business, self-help, and personal development titles for faster learning and habit building.

**Highlights:** 15-minute book summaries, Audiobook summaries, Offline reading, Progress tracking, Habit building challenges, Bookmark favorite notes

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Pro Membership | $4.99 | per month |
| Pro Annual Membership | $19.99 | per year |
| Yearly Pro Membership | $24.99 | per year |
| Lifetime Membership | $39.99 | one-time |

**What reviewers like**

- 🚀 Informative and easy to follow
- 👍 Smooth listening experience
- 👍 Broad library of titles
- 👍 Allows reading or listening
- 👍 User-friendly interface

**What reviewers complain about**

- 🐛 Usability issues when multitasking
- 🐛 Audiobook restarts from beginning
- 🔒 Lack of transparency (broken links, no contact info)
- 👎 Limited book recommendations
- 👎 Needs more book options and larger selection

**Reported bugs**

- Purchased lifetime subscription not accessible on new device
- Identical summaries for different books

**Requested features**

- Support for French books
- Ability to share summaries to Kindle
- More language options (e.g., Chinese)


## Frequently asked questions

### Is Quick Stochastics PRO free?

Quick Stochastics PRO costs $1.99, with no in-app purchases.

### Is ReadBay free?

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

### Do Quick Stochastics PRO or ReadBay have ads?

Neither Quick Stochastics PRO nor ReadBay shows ads.

### Which is updated more often, Quick Stochastics PRO or ReadBay?

Quick Stochastics PRO ships an update every 4 weeks, and ReadBay every 10 days. Most recently, Quick Stochastics PRO was updated on October 25, 2026 and ReadBay on October 23, 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.*