GCD and LCM vs Study Focus Timer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
GCD and LCM
This app calculates the Greatest Common Divisor (GCD) and Least Common Multiple (LCM) for up to four numbers. It also provides prime factorization and keeps a history of calculations, which can be emailed.
- Calculates GCD/GCF for 2-4 numbers
- Calculates LCM for 2-4 numbers
- Finds prime factorization
- Stores calculation history
- Sends results and history via email
- Supports portrait and landscape modes
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GCD and LCM calculator - calculate the Greatest Common Factor/Greatest Common Divisor and the Least Common Multiple. The app finds the greatest common divisor (GCD)/greatest common factor (GCF) and Least Common Multiple (LCM) of two, three numbers and four numbers. Finds the prime factorization of numbers and shows it in the standard and exponential forms. Just enter two, three or four integers and tap "Calculate". The app lists all factors and identifies the common ones. Keeps calculation history. Sends results and history via email. Supports both portrait and landscape orientation.
Study Focus Timer
This app helps you stay focused during study sessions using customizable timers. It supports the Pomodoro technique and allows for easy arrangement and visual tracking of your work and break intervals. Optimize your learning with flexible timer combinations.
- Pomodoro study timer
- Successive timer settings
- Interval timer customization
- Easy timer rearrangement
- Visual elapsed time gauge
- List of current study sets
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●Pomodoro study timer ・You can set successive timers. ・You can set interval timers. ●Example of timers Pomodoro technique for studying: 25 min studying - 5 min rest - 25 min studying - 5 min rest - 25 min studying - 5 min rest - 25 min studying - 5 min rest - 30 min rest = Various timer combinations are possible!! So, you can use Studying timer for a variety of continuous tasks including for pomodoro technique!! ●Easy to rearrange the pomodoro timers ・You can make interval at once for pomodoro technique. ・You can sort study timers by dragging ・You can delete study timers by slide sideways ●Easy to understand visually ・You can find elapsed time on the gauge. ・You can find the current study set on the list. ●Pomodoro technique Pomodoro technique is a method of repeatedly dividing one task into smaller pieces, finishing each divided task in a short time, and then taking a break. Pomodoro Technique is said to be useful for studying. Studying timer is one of the best Pomodoro timers for studying. If you are looking for a recommended Pomodoro timer, please try this timer app!!! -- ・Terms of service https://japy.jp/2022/03/service-term-en.html ・Privacy policy https://japy.jp/2022/03/Privacy-Policy-en.html
Screenshots
Verdict
The clearest difference is price: Study Focus Timer at Free against GCD and LCM's $3.99. Study Focus Timer also leads on review sentiment (100% vs 69%) and update cadence (fortnightly vs every 19 months). GCD and LCM's advantage is in-app purchases (none vs 1) and ads (none vs shown). On device support and iOS requirement 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
Study Focus Timer is free to download; GCD and LCM costs $3.99 up front. Study Focus Timer sells 1 in-app purchase, starting at $0.99 per month. GCD and LCM asks for nothing beyond the download.
GCD and LCM ships an update every 19 months, Study Focus Timer fortnightly. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.
| Parameter | GCD and LCM | Study Focus Timer |
|---|---|---|
| Price | $3.99 | Free — better |
| Rating | 2.0 (2 ratings) — better | — |
| Positive reviews | 69.2% of reviews | 100.0% of reviews — better |
| Number of ratings | 2 — better | — |
| Update frequency | Every 19 months | Fortnightly — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free with in-app purchases — better |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad, iPod |
| Requires iOS | 12.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 14 MB | 44 MB |
| Age rating | 4+ | 4+ |
| Developer | Intemodino Group s.r.o. | Foodmenu.world Inc. |
Customer experience
GCD and LCM
Study Focus Timer
In-app purchases
GCD and LCM
No in-app purchases
Study Focus Timer
- Premium$0.991 Month
Questions
Is GCD and LCM free?
Is Study Focus Timer free?
Do GCD and LCM or Study Focus Timer have ads?
Which is updated more often, GCD and LCM or Study Focus Timer?
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