TimeTable vs Greatest Common Factor
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
TimeTable
Easily compare and convert time across different zones with a visual, scrollable chart. Ideal for planning and understanding time differences, with features like staggered day views and custom offsets.
- Side-by-side time zone comparison
- Scrollable time chart
- Staggered Day mode
- 12/24 hour toggle
- Custom time offsets
- Favorite time zones
- Expansion view for detail
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TimeTable is the easiest way to convert between two time zones. By comparing the two side by side it is incredibly easy to get a quick conversion from one to the other. No need to plug in or think about specific times, simply scroll up and down to find the ones you need. Great for converting blocks of time, like "11am-3pm EST to GMT", or "11:00-16:00 Zulu to CST." Staggered Day mode allows you to view the day/night cycle of both zones relative to each other. Toggle between 12 and 24 hour mode to grab your local time in 24 hour format. * Custom time offsets (Want to see the local time 1h25m from now? No problem!) * 12/24h toggle (View the local or destination time zone in either format) * Favorites (Always jumping between zones? EST 12h -> 24h? PST 12h -> GMT 24h? Add to your favorites for easy access) * Local time: have the current local time highlighted on the chart regardless of zone * Highly customizable! (5 themes with more to come, change row stagger mode, day stagger mode, etc) * Fast, easy to read at a glance * Expansion view (Zoom in on a certain hour to view with more detail, good for strange offsets like GMT-4:30) I originally built this app with pilots in mind. As a private pilot I found myself often needing to convert blocks of time from my local zone to Zulu 24h for weather briefings and general flight planning. Rather than having to select individual times and convert them one by one, the table method allowed me to gain a familiarity with the new zone as if it were my own. No need to think about the conversion, 12h to 24h, etc, simply look at the chart and it was there. I have since found the app to be useful outside of aviation and it was become my preferred way to view "time" as a whole, be it traveling or simply wondering what time it was somewhere! I hope you too find TimeTable to be a fun and useful tool.
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.
Screenshots
Verdict
The clearest difference is rating: Greatest Common Factor at 5.0 against TimeTable's 4.0. Greatest Common Factor also leads on price ($0.99 vs $2.99). TimeTable's advantage is update cadence (every 4 weeks vs every 38 months) and ratings volume (3 vs 1). On ads, in-app purchases, monetization model 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
TimeTable costs $2.99 and Greatest Common Factor $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Greatest Common Factor holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 3 and 1 respectively.
TimeTable ships an update every 4 weeks, Greatest Common Factor every 38 months. The most recent releases landed on October 11, 2026 and September 30, 2026 respectively.
| Parameter | TimeTable | Greatest Common Factor |
|---|---|---|
| Price | $2.99 | $0.99 — better |
| Rating | 4.0 (3 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 3 — better | 1 |
| Update frequency | Every 4 weeks — better | Every 38 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 14.1 — better |
| Further details — not scored | ||
| Size | 0 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | iiAtlas | H Valeur |
Customer experience
TimeTable
Greatest Common Factor
In-app purchases
TimeTable
No in-app purchases
Greatest Common Factor
No in-app purchases
Questions
Is TimeTable free?
Is Greatest Common Factor free?
Which has better reviews, TimeTable or Greatest Common Factor?
Do TimeTable or Greatest Common Factor have ads?
Which is updated more often, TimeTable or Greatest Common Factor?
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