Comparison

World Clock vs RRTool

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

Head to head
About

World Clock

Visualize global time zones with a 3D Earth and Moon. This app displays local times for over 460 cities and offers a 3D/2D map view. It supports numerous system languages and provides detailed country and region information.

Highlights
  • 3D Earth and Moon visualization
  • Solar Clock feature
  • Over 460 cities' local time
  • 3D/2D Time Zone Map
  • Support for numerous system languages
  • Extensive country and region listing
Features
Read full description

SPIN THE WHEEL, SHOW THE TIME ! • 3D Earth & Moon • Solar Clock • Over 460+ Cities Local Time • 3D/2D Time Zone Map • System Languages: English Japanese Russian Chinese Arabic German French Spanish Korean Norwegian Hebrew Danish Portuguese Swedish Indonesian Turkish Dutch Uyghur Hungarian Polish Tibetan Czech Maltese Khmer Urdu Slovak Romanian Greek Slovene Lithuanian Latvian Hindi Kazakh Uzbek Malay Ukrainian • Countries and Regions Abkhazia, Afghanistan, Albania, Algeria, Andorra, Angola, Antigua & Barbuda, Argentina, Armenia, Australia, Austria, Azerbaijan, Bahamas, Bahrain, Bangladesh, Barbados, Belarus, Belgium, Belize, Benin, Bhutan, Bolivia, Bosnia & Herzegovina, Botswana, Brazil, Brunei, Bulgaria, Burkina Faso, Burundi, Cambodia, Cameroon, Canada, Cape Verde, Central Africa, Chad, Chile, China, Colombia, Comoros, East Congo, West Congo, Cook Islands, Costa Rica, Croatia, Cuba, Cyprus, Czech, Denmark, Djibouti, Dominican Republic, Dominica, East Timor, Ecuador, Egypt, El Salvador, Equatorial Guinea, Eritrea, Estonia, Ethiopia, Fiji, Finland, France, Gabon, Gambia, Georgia, Germany, Ghana, Greece, Grenada, Guatemala, Guinea-Bissau, Guinea, Guyana, Haiti, Honduras, Hungary, Iceland, India, Indonesia, Iran, Iraq, Ireland, Israel, Italy, Ivory Coast, Jamaica, Japan, Jordan, Kazakhstan, Kenya, Kiribati, North Korea, South Korea, Kosovo, Kuwait, Kyrgyzstan, Laos, Latvia, Lebanon, Lesotho, Liberia, Libya, Liechtenstein, Lithuania, Luxembourg, Macedonia, Madagascar, Malawi, Malaysia, Maldives, Mali, Malta, Marshall Islands, Mauritania, Mauritius, Mexico, Micronesia, Moldova, Monaco, Mongolia, Montenegro, Morocco, Mozambique, Myanmar, Nagorno-Karabakh, Namibia, Nauru, Nepal, Netherlands, New Zealand, Nicaragua, Nigeria, Niger, Niue, Norway, Oman, Pakistan, Palau, Palestine, Panama, Papua New Guinea, Paraguay, Peru, Philippines, Poland, Portugal, Qatar, Romania, Russia, Rwanda, Sahrawi, St. Kitts & Nevis, St. Lucia, St. Vincent & the Grenadines, Samoa, San Marino, Saudi Arabia, Senegal, Serbia, Seychelles, Sierra Leone, Singapore, Slovakia, Slovenia, Solomon Islands, Somalia, Somaliland, South Africa, South Ossetia, South Sudan, Spain, Sri Lanka, Sudan, Suriname, Swaziland, Sweden, Switzerland, Syria, São Tomé & Príncipe, Tajikistan, Tanzania, Thailand, Togo, Tonga, Transnistria, Trinidad & Tobago, Tunisia, Turkey, Turkmenistan, Tuvalu, Uganda, Ukraine, UAE, UK, US, Uruguay, Uzbekistan, Vanuatu, Vatican City, Venezuela, Vietnam, Yemen, Zambia, Zimbabwe

About

RRTool

Features
Read full description

RRTool is the extended features companion app to your RR1090 digital refractometer and similar Bay Area Instruments devices. It communicates via encrypted BLE with your device, mirroring its buttons and providing extended functionalities such as: cloud spreadsheet logging of your measurements, enabling of ATC for Brix, QR code generation and device firmware upgrades.

Screenshots

World Clock4 screens
RRTool4 screens

Verdict

The call

The clearest difference is price: RRTool at Free against World Clock's $2.99. RRTool also leads on update cadence (every 4 months vs every 21 months). On ads, in-app purchases, device support 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

RRTool is free to download; World Clock costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

World Clock ships an update every 21 months, RRTool every 4 months. The most recent releases landed on September 17, 2026 and September 16, 2026 respectively.

Scorecard2 real differences · 6 level
World Clock versus RRTool: the parameters behind the verdict, then further details
ParameterWorld ClockRRTool
Price$2.99Free — better
Positive reviews0.0% of reviews—
Update frequencyEvery 21 monthsEvery 4 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.614.0 — better
Further details — not scored
Size11 MB5 MB
Age rating4+4+
Developer俊 姜Bay Area Instruments Inc.

In-app purchases

None

World Clock

No in-app purchases

None

RRTool

No in-app purchases

Questions

Is World Clock free?
World Clock costs $2.99, with no in-app purchases.
Is RRTool free?
RRTool is free to download, with no in-app purchases.
Do World Clock or RRTool have ads?
Neither World Clock nor RRTool shows ads.
Which is updated more often, World Clock or RRTool?
World Clock ships an update every 21 months, and RRTool every 4 months. Most recently, World Clock was updated on September 17, 2026 and RRTool on September 16, 2026.

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