ZoneTime vs Calculator ×
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ZoneTime
Easily compare timezones to schedule meetings and avoid calling people at inconvenient hours. The app features a widget for quick glances and a table to compare up to 20 locations, automatically adjusting for Daylight Saving Time.
- View overlapping timezone hours
- Schedule meetings across timezones
- Today Widget for quick time checks
- Compare up to 20 locations
- Color-coded 'OK to call' times
- Automatic Daylight Saving Time adjustment
- Create calendar events across timezones
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ZoneTime offers a quick and easy way to view overlapping timezone hours, and setup meetings. ZoneTime can help you: * stop waking up your friends and family when you call them overseas. * catch your international colleagues while they're still in the office. * compare timezones between a flight's origin and destination. Included Features * ZoneTime Today Widget now allows you to quickly glance at times across your configured locations without needing to open the app, or unlock you phone. * An easy to use table to compare today's times for up to 20 locations at a time. * Choose from cities from around the globe * Color codes times based on whether it's 'OK' to call. * Automatically adjusts for Daylight Saving Time for each Location. * Edit and rearrange locations you want to compare timezones. * Compare timezones in landscape or portrait orientation. * Create an calendar event across multiple timezones
Calculator ×
This app redefines the calculator experience for touch-screen devices with a modern, intuitive design. It offers features like a tape log for storing calculations, formula evaluation, and iPad multitasking support for enhanced productivity.
- Tape Log for calculation history
- Reuse, copy, and share calculations
- Evaluate entire formulas at once
- iPad multitasking support
- Modern touch-screen design
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Designed exclusively for today's touch-screen devices, this calculator app represents a groundbreaking paradigm shift, leaving behind the outdated design patterns of mechanical calculators. We have meticulously crafted a new design from scratch, keeping modern touch-screen devices at the forefront of our innovation. • Tape Log: All your calculations are securely stored in the tape log, ensuring you never lose track of your numerical journey. • Calculation Management: Effortlessly reuse, copy, or share calculations to integrate them seamlessly into your work or daily life. • Formula Evaluation: Enter entire formulas in one line for swift and accurate evaluation, simplifying complex calculations. • iPad Multitasking: Experience true productivity with iPad multitasking support, enabling you to perform calculations while using other apps through Slide Over and Split View. Calculator Pro represents a powerful departure from traditional calculators, offering a tailored experience for touch-screen devices. Download now and embrace a new era of calculations with maximum control and power at your fingertips. Terms of Use: https://doubleuapp.com/privacy/terms.html
Screenshots
Verdict
The clearest difference is rating: ZoneTime at 5.0 against Calculator ×'s 4.5. ZoneTime also leads on in-app purchases (none vs 4) and ads (none vs shown). Calculator ×'s advantage is ratings volume (143 vs 1). On price, update cadence 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
Both are free to download. Calculator × sells 4 in-app purchases, starting at $4.99 per year. ZoneTime asks for nothing beyond the download.
ZoneTime holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Calculator × has 143 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 100% of ZoneTime's written reviews are positive against 73% of Calculator ×'s.
ZoneTime ships an update every 3 months, Calculator × every 2 months. The most recent releases landed on September 9, 2026 and September 21, 2026 respectively.
| Parameter | ZoneTime | Calculator × |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | 4.5 (143 ratings) |
| Positive reviews | 100.0% of reviews — better | 73.3% of reviews |
| Number of ratings | 1 | 143 — better |
| Update frequency | Every 3 months | Every 2 months — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 8.0 — better | 13.6 |
| Further details — not scored | ||
| Size | 26 MB | 10 MB |
| Age rating | 4+ | 4+ |
| Developer | Glen Tregoning | DOUBLE U s.r.o. |
Customer experience
ZoneTime
Calculator ×
In-app purchases
ZoneTime
No in-app purchases
Calculator ×
- Premium Yearly$4.991 Year
- Remove ads$4.99
- Remove ads$7.99
- Remove ads$11.99









