# SoBrief vs Cognopolis

The clearest difference is update cadence: Cognopolis at every 3 days against SoBrief's every 6 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. SoBrief sells 10 in-app purchases, starting at $9.99 per month and Cognopolis sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

SoBrief ships an update every 6 weeks, Cognopolis every 3 days. The most recent releases landed on November 10, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | SoBrief | Cognopolis |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (433 ratings)](https://appshunter.io/ios/app/sobrief-book-summaries/id6723865613/reviews)** | — |
| Number of ratings | **433** | — |
| Positive reviews | 17.5% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 3 days** |
| Monetization | Free with in-app purchases | — |
| Size | 20 MB | 71 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Audiblogs, Inc.](https://appshunter.io/developer/1543239358) | [Rakson Duarte](https://appshunter.io/developer/6772416663) |

## What reviewers say

### SoBrief

[App page](https://appshunter.io/ios/app/sobrief-book-summaries/id6723865613)

Access concise summaries of non-fiction books and full narratives of novels in about 10 minutes. Read or listen to over 26,000 titles in more than 40 languages, helping you finish books, retain information, and stay current with popular titles.

**Highlights:** 10-minute book summaries, Audio narration for books, Summaries in 40+ languages, Non-fiction and fiction content, Personalized recommendations, Book request feature, Home and lock screen widgets

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SoBrief Pro (Monthly) | $9.99 | per month |
| SoBrief Pro (Monthly) | $9.99 | per month |
| SoBrief Pro (Monthly) | $9.99 | per month |
| SoBrief Pro (Monthly) | $9.99 | per month |
| SoBrief Pro (Yearly) | $29.99 | per year |
| SoBrief Pro (Yearly) | $44.99 | per year |
| SoBrief Pro (Yearly) | $44.99 | per year |
| SoBrief Pro (Yearly) | $44.99 | per year |
| SoBrief Pro (Lifetime) | $59.99 | one-time |
| SoBrief Pro (Lifetime) | $79.99 | one-time |

**What reviewers like**

- 👍 Great concept
- 👍 Love the idea
- 👍 Appreciated for catching up on books
- 👍 Allows accelerated reading
- 👍 Summaries are good and informative

**What reviewers complain about**

- 😞 App crashes frequently
- 😞 Technical issues
- 😞 Low-quality AI summaries
- 😞 Extortionate fees/pricing
- 😞 App not working

**Reported bugs**

- App crashed and stopped working
- App not working
- App crashes frequently
- Delete account button not functional
- Refuse to remove my data

**Requested features**

- Allow users to see how the app works before paying
- Upload GoodReads history
- Include Spanish in languages section
- Better book recommendation engine
- More human-written summaries


### Cognopolis

[App page](https://appshunter.io/ios/app/cognopolis/id6772416661)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Cognopolis Premium Mensual | $4.99 | per month |
| Cognopolis Premium Anual | $29.99 | per year |


## Frequently asked questions

### Is SoBrief free?

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

### Is Cognopolis free?

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

### Do SoBrief or Cognopolis have ads?

Neither SoBrief nor Cognopolis shows ads.

### Which is updated more often, SoBrief or Cognopolis?

SoBrief ships an update every 6 weeks, and Cognopolis every 3 days. Most recently, SoBrief was updated on November 10, 2026 and Cognopolis on November 5, 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.*