# CPI Digital vs NBR E

The clearest difference is rating: CPI Digital at 5.0 against NBR E's 4.5. CPI Digital also leads on iOS requirement (11.0 vs 16.0). NBR E's advantage is update cadence (every 2 weeks vs every 3 months). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

CPI Digital holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 1 and 2 respectively.

CPI Digital ships an update every 3 months, NBR E every 2 weeks. The most recent releases landed on June 9, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | CPI Digital | NBR E |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/cpi-digital/id1528042593/reviews)** | [4.5 (2 ratings)](https://appshunter.io/ios/app/nbr-e-library/id1588680132/reviews) |
| Number of ratings | 1 | **2** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 weeks** |
| Monetization | Free | Free |
| Size | 148 MB | 71 MB |
| Requires iOS | **11.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Childrens Plus Inc.](https://appshunter.io/developer/1528042595) | [ODILOTID SL](https://appshunter.io/developer/976580041) |

## What reviewers say

### CPI Digital

[App page](https://appshunter.io/ios/app/cpi-digital/id1528042593)

Access a wide range of eBooks from leading publishers directly on your device. This platform provides instant access to a curated collection of educational titles.

**Highlights:** All-access eBook platform, Instant access to titles, Content from top publishers, User-friendly interface

**Features:** macOS Compatibility

**In-app purchases:** none


### NBR E

[App page](https://appshunter.io/ios/app/nbr-e-library/id1588680132)

Access a vast collection of digital content including ebooks, audiobooks, podcasts, videos, and courses in various formats, themes, and languages. Personalize your learning journey based on your tastes and preferences.

**Highlights:** Thousands of digital content items, Multiple formats: ebooks, audiobooks, podcasts, videos, courses, magazines, Diverse themes and languages, Personalized reading experience, Create your own learning experience

**In-app purchases:** none


## Frequently asked questions

### Is CPI Digital free?

CPI Digital is free to download, with no in-app purchases.

### Is NBR E free?

NBR E is free to download, with no in-app purchases.

### Which has better reviews, CPI Digital or NBR E?

CPI Digital is rated higher. CPI Digital averages 5.0 out of 5 from 1 ratings, while NBR E averages 4.5 from 2 ratings.

### Do CPI Digital or NBR E have ads?

Neither CPI Digital nor NBR E shows ads.

### Which is updated more often, CPI Digital or NBR E?

CPI Digital ships an update every 3 months, and NBR E every 2 weeks. Most recently, CPI Digital was updated on June 9, 2026 and NBR E on September 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.*