Greatest Common Factor vs PixShrink
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Greatest Common Factor
This app helps users find the factors of numbers, calculate the Greatest Common Factor (GCF) for two or more numbers, and simplify fractions. It's a useful tool for understanding number theory concepts and performing fraction simplification.
- Find factors of a number
- Calculate GCF of two or more numbers
- Simplify fractions
- Understand number theory concepts
- Fraction simplification tool
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The factors of a number are all the integers that you can evenly divide into that number. The Greatest Common Factor (GCF) is the greatest integer that divides exactly into two or more numbers with no remainder. The Greatest Common Factor is used to simplify fractions. To simplify a fraction, you can divide the numerator and denominator of the fraction by the GCF of the numerator and denominator. Factors, the Greatest Common Factor, and simplifying fractions go hand-in-hand. Use this app to get the factors of a number, get the Greatest Common Factor of two or more numbers, and to simplify fractions.
PixShrink
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PixShrink is a privacy-first photo compressor that works 100% on-device—no uploads, no accounts. Features - Batch compression to save storage fast - Format support: JPG / PNG / HEIC / GIF / WebP - Before/after slider with zoom & pan to inspect details - Save to Photos, optionally delete originals - Metadata controls Privacy - On-device processing only. No server uploads. - Privacy Policy: https://wenxingjun.github.io/massimagecomp/terms/terms-en.html Subscription / Purchases - Upgrade to Pro to unlock advanced features. - Pro offers auto-renewing subscriptions (Monthly, Annual) and a one-time purchase option (Lifetime), where available. - Payment will be charged to your Apple ID account at confirmation of purchase. - Auto-renewing subscriptions automatically renew unless canceled at least 24 hours before the end of the current period. - You can manage or cancel your subscription at any time in iOS Settings > Apple ID > Subscriptions. - Prices may vary by region and are shown in the app before purchase. Terms of Use (EULA) https://wenxingjun.github.io/massimagecomp/terms/terms-en.html
Screenshots
Verdict
The clearest difference is price: PixShrink at Free against Greatest Common Factor's $0.99. PixShrink also leads on update cadence (every 3 weeks vs every 38 months). Greatest Common Factor's advantage is in-app purchases (none vs 3) and ads (none vs shown).
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
PixShrink is free to download; Greatest Common Factor costs $0.99 up front. PixShrink sells 3 in-app purchases, starting at $1.99 per month. Greatest Common Factor asks for nothing beyond the download.
Greatest Common Factor ships an update every 38 months, PixShrink every 3 weeks. The most recent releases landed on October 16, 2026 and October 7, 2026 respectively.
| Parameter | Greatest Common Factor | PixShrink |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 38 months | Every 3 weeks — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 14.1 — better | 17.6 |
| Further details — not scored | ||
| Size | 1 MB | 10 MB |
| Age rating | 4+ | 4+ |
| Developer | H Valeur | 兴俊 温 |
In-app purchases
Greatest Common Factor
No in-app purchases
PixShrink
- PixShrink Pro Monthly$1.991 Month
- PixShrink Pro Annual$9.991 Year
- PixShrink Pro Lifetime$29.99
Questions
Is Greatest Common Factor free?
Is PixShrink free?
Do Greatest Common Factor or PixShrink have ads?
Which is updated more often, Greatest Common Factor or PixShrink?
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