Least Common Multiple (LCM) vs WhatDiff
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Least Common Multiple (LCM)
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The IOS Least Common Multiple (LCM) App was created in response to requests by visitors to the popular https://multiples.info website. This app will not only find the LCM of your numbers, but it will also calculate the multiplier you need to multiply each number by to get the LCM. The app is fast, intuitive, and easy to use. It is a standalone app, which means that it will work perfectly fine in places with little or no Internet access. We hope the Least Common Multiple App will become one of your favorite math apps.
WhatDiff
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WhatDiff – Compare Files with Precision WhatDiff is a powerful file comparison app that helps you quickly identify differences between files across multiple formats. It supports photos, videos, audio, documents, and other file types from your Photo Library, Files app, and cloud storage platforms. With built-in MD5 checksum verification, detailed file attributes, and advanced comparison tools like line-by-line document diff, WhatDiff gives you deep insight into every file. #######Smart Comparison by File Type ---Photos • Use the slider to compare photo content. View and compare detailed metadata, including: • File name, size, MD5 • Created & modified dates • Dimensions, resolution • Color space & color profile • Device make & model • Exposure time, ISO, focal length, F-number • Flash, metering mode, white balance • Content creator • GPS location (latitude & longitude) ---Videos • Compare video files with rich technical details: • File name, size, MD5 • Created & modified dates • Dimensions & codecs • Duration • Color profile • Audio channels • GPS location (latitude & longitude) ---Audio Analyze and compare audio files: • File name, size, MD5 • Created & modified dates • Codecs • Duration • Audio channels ---Documents • Go beyond basic comparison with content analysis: • File name, size, MD5 • Created & modified dates • Word, character, and line counts • Content similarity • Content preview • Highlighted differences (line-by-line) ---Other File Types • For all other formats, WhatDiff provides: • File name, size, MD5 • Created & modified dates ###Why WhatDiff### • Supports multiple file sources (Photos, Files, Cloud) • Deep metadata comparison • Accurate checksum verification • Clear, structured results for quick insights Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is price: WhatDiff at Free against Least Common Multiple (LCM)'s $0.99. WhatDiff also leads on update cadence (every 5 months vs every 38 months). Least Common Multiple (LCM)'s advantage is in-app purchases (none vs 3) and iOS requirement (14.1 vs 16.4). On ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
WhatDiff is free to download; Least Common Multiple (LCM) costs $0.99 up front. WhatDiff sells 3 in-app purchases, starting at $2.99 per month. Least Common Multiple (LCM) asks for nothing beyond the download.
Least Common Multiple (LCM) ships an update every 38 months, WhatDiff every 5 months. The most recent releases landed on September 13, 2026 and September 8, 2026 respectively.
| Parameter | Least Common Multiple (LCM) | WhatDiff |
|---|---|---|
| Price | $0.99 | Free — better |
| Update frequency | Every 38 months | Every 5 months — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 14.1 — better | 16.4 |
| Further details — not scored | ||
| Size | 0 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | H Valeur | 栋 陈 |
In-app purchases
Least Common Multiple (LCM)
No in-app purchases
WhatDiff
- WhatDiff Month Subscription$2.991 Month
- WhatDiff Annual Subscription$12.991 Year
- WhatDiff Lifetime License$24.99
Questions
Is Least Common Multiple (LCM) free?
Is WhatDiff free?
Do Least Common Multiple (LCM) or WhatDiff have ads?
Which is updated more often, Least Common Multiple (LCM) or WhatDiff?
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