Comparison

VOOL vs Tempus World Clock

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

VOOL

Features
Read full description

Want to cut your usual charging costs in half? Better hit that blue GET button. VOOL App tracks Nord Pool energy prices to get your EV fully charged and cut your charging costs. Don't interrupt your life to toggle the on/off switch, either. Automate your charging with VOOL. VOOL APP • Works with all OCPP-compliant chargers, but best with the VOOL Charger • Tracks and displays Nord Pool energy prices • Automatically charges your EV below your selected kW price • Turns charging on and off remotely • Gives a full overview of your charging sessions Setting up your charger, your EV, and your favourite charging location is simple. Once you're up and running, the VOOL App remembers your preferred charging rates, shows you your charging sessions — and savings, and will notify you only when absolutely necessary. VOOL is on a mission to make your EV Charging experience more reliable, cheap, and elegant. VOOL App and EV Charger are just the beginning.

About

Tempus World Clock

Easily track multiple time zones with customizable clocks for people and places. Convert times instantly, find optimal meeting slots across different regions, and view city details including weather and sunrise/sunset.

Highlights
  • Customizable clocks with names and colors
  • Instant time conversion across zones
  • Meeting time finder with working hours
  • City detail view with weather and sunrise/sunset
  • Apple Watch app and complications
  • Home Screen widgets
  • iCloud sync across devices
Features
Read full description

Tempus is a world clock and time zone converter built for people who work, travel, and stay in touch across time zones. It is at home on iPhone, iPad, and Apple Watch. NAME YOUR CLOCKS Add clocks for cities or for the people you talk to. Give each one a custom name, an emoji, and a color tag so "Mum in Sydney" or "Design team, Berlin" is readable at a glance. Choose emoji from a searchable catalog with recents and suggestions for the city. Pick analog or digital faces, 12 or 24 hour time, and see the time difference from wherever you are. CONVERT TIMES INSTANTLY Pick any time in any zone and see it in all your clocks at once. Drag the time scrubber to slide through the day and watch every clock move together. Day and night indicators show who is awake. FIND A MEETING TIME THAT WORKS Select two or more clocks, set working hours for each, and Tempus shows the overlapping windows where everyone is available. Add the meeting to your calendar in one tap or share it as an .ics invite. CITY DETAIL Tap any clock for a full city view: a skyline illustration that changes with the time of day, sunrise and sunset on a daylight arc, and current weather conditions. IPAD On iPad, Tempus uses a native split layout: browse your clocks in a sidebar while City Detail stays open beside them. Time Converter and Meeting Finder open in the detail column with room for a full-width overlap timeline. Keyboard shortcuts and pointer hover are supported throughout. APPLE WATCH Tempus on Apple Watch shows your clocks on your wrist, lets you convert times with the Digital Crown, and offers complications for your favorite clocks. Clocks sync instantly between iPhone and Apple Watch. WIDGETS AND SYNC Home Screen widgets keep your clocks in view. Your clocks sync across all your devices with iCloud. PRIVACY FIRST Tempus has no account, no ads, and no tracking. Your clocks are stored on your device and in your private iCloud database. Weather is provided by Apple Weather for the cities you add, never for your own location.

Screenshots

VOOL4 screens
Tempus World Clock4 screens

Verdict

The call

The clearest difference is price: VOOL at Free against Tempus World Clock's $1.99. Tempus World Clock's advantage is update cadence (weekly vs fortnightly) and device support (3 vs 1). On ads, in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

VOOL is free to download; Tempus World Clock costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

VOOL ships an update fortnightly, Tempus World Clock weekly. Both last shipped on October 4, 2026.

Scorecard3 real differences · 7 level
VOOL versus Tempus World Clock: the parameters behind the verdict, then further details
ParameterVOOLTempus World Clock
PriceFree — better$1.99
Rating—5.0 (1 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—1 — better
Update frequencyFortnightlyWeekly — better
AdsNoNo
In-app purchasesNoNo
Monetization—Paid
DevicesiPhoneiPhone, iPad, Apple Watch — better
Requires iOS17.617.0 — better
Further details — not scored
Size125 MB46 MB
Age rating4+4+
DeveloperMultiCharge OUViktor Gamov

In-app purchases

None

VOOL

No in-app purchases

None

Tempus World Clock

No in-app purchases

Questions

Is VOOL free?
VOOL is free to download, with no in-app purchases.
Is Tempus World Clock free?
Tempus World Clock costs $1.99, with no in-app purchases.
Do VOOL or Tempus World Clock have ads?
Neither VOOL nor Tempus World Clock shows ads.
Which is updated more often, VOOL or Tempus World Clock?
VOOL ships an update fortnightly, and Tempus World Clock weekly. Most recently, VOOL was updated on October 4, 2026 and Tempus World Clock on October 4, 2026.

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