# calcMod vs LCM GCD Prime Factor Math

The clearest difference is update cadence: calcMod at every 6 days against LCM GCD Prime Factor Math's every 18 months. LCM GCD Prime Factor Math's advantage is iOS requirement (11.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

calcMod costs $0.99 and LCM GCD Prime Factor Math $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

calcMod ships an update every 6 days, LCM GCD Prime Factor Math every 18 months. The most recent releases landed on September 19, 2026 and May 16, 2026 respectively.

## The numbers

| Metric | calcMod | LCM GCD Prime Factor Math |
| --- | --- | --- |
| Price | $0.99 | $0.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 days** | Every 18 months |
| Size | 1 MB | 5 MB |
| Requires iOS | 15.0 | **11.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Alain Cardinaux](https://appshunter.io/developer/1443066124) | [Maria Dolores Garcia Ferre](https://appshunter.io/developer/970100146) |

## What reviewers say

### calcMod

[App page](https://appshunter.io/ios/app/calcmod-prox/id1443066125)

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

**In-app purchases:** none


### LCM GCD Prime Factor Math

[App page](https://appshunter.io/ios/app/lcm-gcd-prime-factor-math/id1488738897)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is calcMod free?

calcMod costs $0.99, with no in-app purchases.

### Is LCM GCD Prime Factor Math free?

LCM GCD Prime Factor Math costs $0.99, with no in-app purchases.

### Do calcMod or LCM GCD Prime Factor Math have ads?

Neither calcMod nor LCM GCD Prime Factor Math shows ads.

### Which is updated more often, calcMod or LCM GCD Prime Factor Math?

calcMod ships an update every 6 days, and LCM GCD Prime Factor Math every 18 months. Most recently, calcMod was updated on September 19, 2026 and LCM GCD Prime Factor Math on May 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.*