# Least Common Multiple (LCM) vs When

The clearest difference is price: When at Free against Least Common Multiple (LCM)'s $0.99. When also leads on update cadence (every 4 days vs every 38 months). Least Common Multiple (LCM)'s advantage is iOS requirement (14.1 vs 16.0). On ads, in-app purchases and device support there is nothing between them.

When is free to download; Least Common Multiple (LCM) costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Least Common Multiple (LCM) ships an update every 38 months, When every 4 days. The most recent releases landed on October 1, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Least Common Multiple (LCM) | When |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/when-event-countdown/id6446132386/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 38 months | **Every 4 days** |
| Monetization | — | Free |
| Size | 0 MB | 3 MB |
| Requires iOS | **14.1** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [H Valeur](https://appshunter.io/developer/621824042) | [Clark Dinnison](https://appshunter.io/developer/1645460140) |

## What reviewers say

### Least Common Multiple (LCM)

[App page](https://appshunter.io/ios/app/least-common-multiple-lcm/id1572012661)

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

**In-app purchases:** none


### When

[App page](https://appshunter.io/ios/app/when-event-countdown/id6446132386)

Never forget important dates again with this simple event tracking tool. Easily add and customize upcoming events like birthdays and anniversaries to see them all at a glance. Stay organized and ensure you never miss a moment that matters.

**Highlights:** Track birthdays and anniversaries, Countdown to concerts and vacations, Simple event adding, Customizable with emojis, Clear event overview

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Least Common Multiple (LCM) free?

Least Common Multiple (LCM) costs $0.99, with no in-app purchases.

### Is When free?

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

### Do Least Common Multiple (LCM) or When have ads?

Neither Least Common Multiple (LCM) nor When shows ads.

### Which is updated more often, Least Common Multiple (LCM) or When?

Least Common Multiple (LCM) ships an update every 38 months, and When every 4 days. Most recently, Least Common Multiple (LCM) was updated on October 1, 2026 and When on October 4, 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.*