# Bernoulli Process PRO vs ReadBay

The clearest difference is price: ReadBay at Free against Bernoulli Process PRO's $1.99. ReadBay also leads on update cadence (every 10 days vs monthly). Bernoulli Process 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; Bernoulli Process PRO costs $1.99 up front. ReadBay sells 4 in-app purchases, starting at $4.99 per month. Bernoulli Process PRO asks for nothing beyond the download.

Bernoulli Process PRO ships an update monthly, ReadBay every 10 days. The most recent releases landed on September 9, 2026 and July 10, 2026 respectively.

## The numbers

| Metric | Bernoulli Process PRO | ReadBay |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | — | **[4.8 (256 ratings)](https://appshunter.io/ios/app/readbay-book-summaries/id6499073338/reviews)** |
| Number of ratings | — | **256** |
| Positive reviews | — | 84.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **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

### Bernoulli Process PRO

[App page](https://appshunter.io/ios/app/bernoulli-process-pro/id6472449062)

**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 Bernoulli Process PRO free?

Bernoulli Process PRO costs $1.99, with no in-app purchases.

### Is ReadBay free?

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

### Do Bernoulli Process PRO or ReadBay have ads?

Neither Bernoulli Process PRO nor ReadBay shows ads.

### Which is updated more often, Bernoulli Process PRO or ReadBay?

Bernoulli Process PRO ships an update monthly, and ReadBay every 10 days. Most recently, Bernoulli Process PRO was updated on September 9, 2026 and ReadBay on July 10, 2026.

---

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