Zulu Time vs Plus Calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Zulu Time
This app displays local and UTC (Zulu) time, along with multiple time zones, on your iPhone, Apple Watch, and iPad. It offers widgets for quick access and features for calculating future or past times with offsets, simplifying timezone conversions for various professions.
- Display local and Zulu (UTC) time
- Multiple time zone display
- Home and Lock Screen widgets
- Apple Watch complications
- Future/past time offset calculations
- Time zone conversion
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An iPhone, Apple Watch and iPad app to see Local and Zulu time (GMT) or multiple time zones in a single glance. Includes Widgets for both the iPhone and Apple Watch. Useful for pilots in getting weather briefings and filing flight plans, or Ham radio operators to do timezone conversions. No more worrying about getting the timezone offset correct or Daylight Savings Time conversions. Easily convert from different time zones, including times in the future or past. On the iPhone: - Home and Lock Screen widgets - The Zulu Time page gives a quick view of both Zulu and Local times - The Offset Time page allows you to see Zulu and local time either in the future or past by entering an offset via the Offset button. Tapping either Zulu or Local times will allow you to enter a time in the future or past, synchronizing both Local and Zulu times with that offset. The offset only applies to this view (except on the iPad the offset applies to everything on the page) - The Multiple Zones page allows you to add as many time zones as you wish in a scrolling view. Clicking on any Time Zone will allow you to change it. on iPad: All information is combined on one screen. You have user customizable time zones on the right hand side. On the left, you have Zulu and Local time and one customizable time zone. The offset to see future or past time can be done via the Offset button or tapping any of either the Zulu, Local or Custom time buttons on the left. On the Watch: Complications available in all watch faces making for glanceable ZuluTime and access to the app, which gives offset able time computation.
Plus Calculator
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A time-saving calculator designed to combine the efficiency of operation and beauty of appearance. To save your time, it remembers every operation you have made and it allows you to easily recall the calculations made. If you close the calculator to do something else, you will find the same calculation on your return. You will never have to enter the same calculations again.
Screenshots
Verdict
The clearest difference is update cadence: Zulu Time at every 3 months against Plus Calculator's every 11 months. Plus Calculator's advantage is iOS requirement (11.0 vs 17.6). On price, ads, in-app purchases 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
Zulu Time costs $0.99 and Plus Calculator $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Zulu Time ships an update every 3 months, Plus Calculator every 11 months. The most recent releases landed on October 29, 2026 and October 25, 2026 respectively.
| Parameter | Zulu Time | Plus Calculator |
|---|---|---|
| Price | $0.99 | $0.99 |
| Rating | 4.8 (2.6K ratings) — better | — |
| Positive reviews | 78.6% of reviews | — |
| Number of ratings | 2.6K — better | — |
| Update frequency | Every 3 months — better | Every 11 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Requires iOS | 17.6 | 11.0 — better |
| Further details — not scored | ||
| Size | 16 MB | 10 MB |
| Age rating | 4+ | 4+ |
| Developer | Derek Spears | andrzej kar |
Bugs and requests
Zulu Time
Reported bugs
3 issues- Complication freezes after a few days
- Zulu time loses accuracy over time on Apple Watch
- Widget not updating local time properly
Requested features
5 requests- Add alarm feature
- Allow landscape mode for bedside clock view
- Provide option for always-on display
- Add time zone map for quick reference
- Show day of year in display
Plus Calculator
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Zulu Time
No in-app purchases
Plus Calculator
No in-app purchases
Questions
Is Zulu Time free?
Is Plus Calculator free?
Do Zulu Time or Plus Calculator have ads?
Which is updated more often, Zulu Time or Plus Calculator?
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