# Primality vs Helm

The clearest difference is in-app purchases: Primality at none against Helm's 1. Primality also leads on iOS requirement (13.2 vs 17). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Helm sells 1 one-off in-app purchase. Primality asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on September 27, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Primality | Helm |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (24 ratings)](https://appshunter.io/ios/app/primality/id1516003672/reviews)** | — |
| Number of ratings | **24** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free | — |
| Size | 1 MB | 28 MB |
| Requires iOS | **13.2** | 17 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Bruce Schechter](https://appshunter.io/developer/1515359087) | [Cappsule Teknoloji](https://appshunter.io/developer/1676687521) |

## What reviewers say

### Primality

[App page](https://appshunter.io/ios/app/primality/id1516003672)

This app determines if a given integer is prime or provides its prime factors. It also calculates the ordinal position of prime numbers found, up to a certain limit.

**Highlights:** Primality testing, Prime factorization, Prime ordinality calculation, Large integer support (up to 999,999,999,999), Clean and simple interface

**Features:** macOS Compatibility

**In-app purchases:** none


### Helm

[App page](https://appshunter.io/ios/app/helm-mac-remote-controller/id6761204919)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Helm Pro | $4.99 | one-time |


## Frequently asked questions

### Is Primality free?

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

### Is Helm free?

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

### Do Primality or Helm have ads?

Neither Primality nor Helm shows ads.

### Which is updated more often, Primality or Helm?

Primality ships an update every 2 months, and Helm every 2 months. Most recently, Primality was updated on September 27, 2026 and Helm on October 3, 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.*