ZoneTime vs whatwatt
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
whatwatt
This utility app is preparing for future enhancements. Developers are working on new functionalities that will be revealed soon.
- Future feature groundwork
- Upcoming enhancements
- Developer updates
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The app that allows you to install whatwatt Go on a compatible smart meter, receive smart meter data in real time and connect your smart meter to services. Made for Switzerland.
Screenshots
Verdict
The clearest difference is update cadence: whatwatt at every 2 weeks against ZoneTime's every 3 months. ZoneTime's advantage is iOS requirement (8.0 vs 17.0). On price, rating, review sentiment and ratings volume 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. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 5.0 for ZoneTime against 5.0 for whatwatt. Both are backed by a comparable volume of ratings — 1 and 1 respectively. Written reviews split almost evenly too, at 100% and 100% positive.
ZoneTime ships an update every 3 months, whatwatt every 2 weeks. The most recent releases landed on September 9, 2026 and September 16, 2026 respectively.
| Parameter | ZoneTime | whatwatt |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) | 5.0 (1 ratings) |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 1 | 1 |
| Update frequency | Every 3 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 8.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 26 MB | 53 MB |
| Age rating | 4+ | 4+ |
| Developer | Glen Tregoning | whatwatt AG |
Customer experience
ZoneTime
whatwatt
In-app purchases
ZoneTime
No in-app purchases
whatwatt
No in-app purchases
