# Mersenne Primes vs One Coptic Library

The clearest difference is rating: Mersenne Primes at 5.0 against One Coptic Library's 4.5. Mersenne Primes also leads on review sentiment (100% vs 80%) and update cadence (weekly vs monthly). One Coptic Library's advantage is in-app purchases (none vs 1) and ratings volume (4 vs 1). On price, ads and device support there is nothing between them.

Both are free to download. Mersenne Primes sells 1 one-off in-app purchase. One Coptic Library asks for nothing beyond the download.

Mersenne Primes holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 1 and 4 respectively. Written reviews point the same way: 100% of Mersenne Primes's written reviews are positive against 80% of One Coptic Library's.

Mersenne Primes ships an update weekly, One Coptic Library monthly. The most recent releases landed on August 19, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | Mersenne Primes | One Coptic Library |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/mersenne-primes/id1362004527/reviews)** | [4.5 (4 ratings)](https://appshunter.io/ios/app/one-coptic-library/id1662280247/reviews) |
| Number of ratings | 1 | **4** |
| Positive reviews | **100.0% of reviews** | 80.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Weekly** | Monthly |
| Monetization | Free with in-app purchases | **Free** |
| Size | 60 MB | 80 MB |
| Requires iOS | **9.0** | 15.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [华 魏](https://appshunter.io/developer/454719266) | [St. George & St. Shenouda Coptic Orthodox Church](https://appshunter.io/developer/1573277398) |

## What reviewers say

### Mersenne Primes

[App page](https://appshunter.io/ios/app/mersenne-primes/id1362004527)

Explore and view the digits of all known Mersenne prime numbers. Witness the generation process for extremely large primes, page by page, and locate specific digits by their sequence number.

**Highlights:** View all digits of known Mersenne Primes, Witness prime number generation process, Page-by-page digit exploration, Locate specific digits by sequence number, Generates primes using mobile CPU

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| One Support | $0.99 | one-time |


### One Coptic Library

[App page](https://appshunter.io/ios/app/one-coptic-library/id1662280247)

Access a comprehensive collection of Coptic church rituals, liturgical readings, and hymns on your mobile device. This app brings your church's essential texts together in one convenient place, eliminating the need to carry multiple books.

**Highlights:** Coptic church rituals, Liturgical readings, Hymns collection, All-in-one digital library, On-the-go access

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Mersenne Primes free?

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

### Is One Coptic Library free?

One Coptic Library is free to download, with no in-app purchases.

### Which has better reviews, Mersenne Primes or One Coptic Library?

Mersenne Primes is rated higher. Mersenne Primes averages 5.0 out of 5 from 1 ratings, while One Coptic Library averages 4.5 from 4 ratings.

### Do Mersenne Primes or One Coptic Library have ads?

Neither Mersenne Primes nor One Coptic Library shows ads.

### Which is updated more often, Mersenne Primes or One Coptic Library?

Mersenne Primes ships an update weekly, and One Coptic Library monthly. Most recently, Mersenne Primes was updated on August 19, 2026 and One Coptic Library on September 16, 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.*