Comparison

Least Common Multiple (LCM) vs WhatDiff

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Least Common Multiple (LCM)

Features
Read full description

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.

About

WhatDiff

Features
Read full description

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

Least Common Multiple (LCM)4 screens
WhatDiff4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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.

Scorecard4 real differences · 2 level
Least Common Multiple (LCM) versus WhatDiff: the parameters behind the verdict, then further details
ParameterLeast Common Multiple (LCM)WhatDiff
Price$0.99Free — better
Update frequencyEvery 38 monthsEvery 5 months — better
AdsNoNo
In-app purchasesNo — betterYes
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS14.1 — better16.4
Further details — not scored
Size0 MB2 MB
Age rating4+4+
DeveloperH Valeur栋 陈

In-app purchases

None

Least Common Multiple (LCM)

No in-app purchases

3 purchases

WhatDiff

Subscriptions2
  • WhatDiff Month Subscription$2.991 Month
  • WhatDiff Annual Subscription$12.991 Year
One-time1
  • WhatDiff Lifetime License$24.99

Questions

Is Least Common Multiple (LCM) free?
Least Common Multiple (LCM) costs $0.99, with no in-app purchases.
Is WhatDiff free?
WhatDiff is free to download, with in-app purchases available.
Do Least Common Multiple (LCM) or WhatDiff have ads?
Neither Least Common Multiple (LCM) nor WhatDiff shows ads.
Which is updated more often, Least Common Multiple (LCM) or WhatDiff?
Least Common Multiple (LCM) ships an update every 38 months, and WhatDiff every 5 months. Most recently, Least Common Multiple (LCM) was updated on September 13, 2026 and WhatDiff on September 8, 2026.

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