# Least Common Multiple (LCM) vs TurtleBackup

The clearest difference is price: TurtleBackup at Free against Least Common Multiple (LCM)'s $0.99. TurtleBackup also leads on update cadence (every 3 weeks vs every 38 months). Least Common Multiple (LCM)'s advantage is iOS requirement (14.1 vs 17.0.1). On ads, in-app purchases and device support there is nothing between them.

TurtleBackup 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, TurtleBackup every 3 weeks. The most recent releases landed on October 1, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | Least Common Multiple (LCM) | TurtleBackup |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/turtlebackup/id6744168248/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 38 months | **Every 3 weeks** |
| Monetization | — | Free |
| Size | 0 MB | 1 MB |
| Requires iOS | **14.1** | 17.0.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [H Valeur](https://appshunter.io/developer/621824042) | [SERGEI SOKOLOV](https://appshunter.io/developer/1806340910) |

## 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


### TurtleBackup

[App page](https://appshunter.io/ios/app/turtlebackup/id6744168248)

This utility app allows you to back up files from memory cards to external drives or internal storage, ideal for travelers. It offers options for folder structure, file filtering, and incremental backups, ensuring data integrity and easy review of backup history.

**Highlights:** Backup memory cards to external drives or internal storage, Organize backups by original structure, date, or date/type, Filter files by creation date, Incremental backup support, Integrity check with checksum comparison, Backup history log

**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 TurtleBackup free?

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

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

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

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

Least Common Multiple (LCM) ships an update every 38 months, and TurtleBackup every 3 weeks. Most recently, Least Common Multiple (LCM) was updated on October 1, 2026 and TurtleBackup on September 26, 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.*