# Mersenne Primes vs Sutra

The clearest difference is in-app purchases: Sutra at none against Mersenne Primes's 1. Mersenne Primes's advantage is update cadence (weekly vs every 3 weeks) and iOS requirement (9.0 vs 15.0). 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. Sutra asks for nothing beyond the download.

Mersenne Primes ships an update weekly, Sutra every 3 weeks. The most recent releases landed on October 16, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Mersenne Primes | Sutra |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/mersenne-primes/id1362004527/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Weekly** | Every 3 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 60 MB | 36 MB |
| Requires iOS | **9.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [华 魏](https://appshunter.io/developer/454719266) | [一創系統有限公司](https://appshunter.io/developer/1896256915) |

## 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 |


### Sutra

[App page](https://appshunter.io/ios/app/sutra-buddhist-scriptures/id6772550929)

**Features:** macOS Compatibility, 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 Sutra free?

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

### Do Mersenne Primes or Sutra have ads?

Neither Mersenne Primes nor Sutra shows ads.

### Which is updated more often, Mersenne Primes or Sutra?

Mersenne Primes ships an update weekly, and Sutra every 3 weeks. Most recently, Mersenne Primes was updated on October 16, 2026 and Sutra on October 11, 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.*