Comparison

World Clock Time Zones vs DuoCorder+

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

Head to head
About

World Clock Time Zones

Easily track world times and compare time zones with a beautifully designed, modern interface. Organize cities into custom groups for work, travel, or family, and instantly understand day phases and time differences across countries.

Highlights
  • Track multiple cities and countries
  • Instant time zone comparison
  • Home screen widgets
  • Organize cities into custom groups
  • Visualize day phases
  • Clean, modern interface
Features
Read full description

Timo is a beautifully designed world clock and time zone app built for modern global life. Track world times, compare time zones instantly, and organize your cities into clean visual groups for work, travel, family, and remote collaboration. Unlike traditional world clock apps, Timo focuses on clarity, speed, and visual understanding — so you can instantly see: • Current local times • Time zone differences • Morning, afternoon, evening, or night • Date changes across countries PERFECT FOR • Remote teams coordinating across offices • International meetings, calls, and planning • Digital nomads and frequent travelers • Global friendships and families staying in sync FEATURES • World clocks — Track multiple cities and countries with large, easy-to-read clocks • Time zone comparison — A fast time zone converter shows UTC and GMT offsets at a glance, with no mental math • Widgets — Add beautiful world clock widgets to your Home Screen • Groups — Organize cities into custom sections like Work, Family, or Travel • Day phases — Instantly see whether it's morning, afternoon, evening, or night anywhere, and who's within working hours • Minimal design — A clean, modern interface built for focus and speed Timo helps you stay connected across time zones with less friction and more clarity. Download Timo and bring your world a little closer. Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

DuoCorder+

Transform your iPhone into a handheld sensor scanner. Explore environmental data like sound, air pressure, and magnetic fields with a retro-futuristic interface. Set custom alerts and track 24-hour trends for your sensor readings.

Highlights
  • Live sensor scanning
  • Retro-futuristic display
  • Customizable alerts
  • 24-hour trend charts
  • Metal detector mode
  • Data export (CSV)
  • Privacy-focused design
Features
Currently charting
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DuoCorder turns your iPhone into a handheld sensor scanner. See what your phone can sense about the world around you, live, on one retro-futuristic display. ONE-TAP FULL SCAN Press SCAN and DuoCorder samples every sensor for ten seconds, then explains what it found in plain language: "No magnetic anomalies", "Air pressure falling", "Conversation-level sound". Save the report or share it. MORE THAN A DOZEN LIVE INSTRUMENTS • Motion: acceleration, rotation, tilt and a bubble level • Compass: true and magnetic heading, 3-axis magnetic field strength • Air pressure: barometer, sea-level pressure, altitude change, pressure trend (iPhones with a barometer) • Light: ambient light level estimated from the camera's exposure • Sound: level in decibels, a live spectrum, and a scrolling spectrogram • Pitch: names the strongest note you hear, with how sharp or flat it is • Position: coordinates, speed, course, accuracy and the nearest place name • Activity: steps, distance, floors climbed, cadence and pace • Bluetooth radar: nearby devices, signal strength and a rough range estimate • Your phone: battery, CPU, memory, storage, temperature and network METAL DETECTOR MODE Sweep the phone slowly and listen. The tone rises in pitch and the haptic ticks speed up as the magnetic field changes near metal. YOUR OWN ALERTS Create rules such as "pressure falling faster than 2 hPa/hour", "magnetic field above 70 µT" or "battery below 20%". DuoCorder chirps, buzzes and flashes the screen when one triggers, and keeps a history of recent alerts. Alerts work while the app is open. 24-HOUR TRENDS DuoCorder records your readings while it is open and keeps the last 24 hours. Chart any sensor over 5 minutes to a full day, drag to inspect values, and see your alert thresholds on the chart. SNAPSHOTS AND SHARING Save a snapshot of any page, with your location, then browse your log or export everything as a CSV file. Share a full readable report in one tap. EASY TO LEARN Tap any reading to see what it means, view its trend or set an alert. A quick guide explains the controls, and every button is clearly labelled. BUILT FOR BIG AND FOLDABLE SCREENS The layout fills iPhone, iPad and wide two-panel displays, with the display on top and the keys below. PRIVATE BY DESIGN Everything stays on your device. There are no accounts, no ads, no analytics and no tracking. The microphone, camera and Bluetooth run only while the page or scan that needs them is open. Sound is analysed live and never recorded. The camera is used only for its light reading, and no photos or video are saved. GOOD TO KNOW Readings come from your phone's built-in sensors and are approximate. Which sensors you see depends on your device; for example, the barometer is not in every iPhone. DuoCorder is for curiosity and learning, not for medical, safety, navigation or professional use.

Screenshots

World Clock Time Zones4 screens
DuoCorder+4 screens

Verdict

The call

The clearest difference is price: World Clock Time Zones at Free against DuoCorder+'s $2.99. DuoCorder+'s advantage is in-app purchases (none vs 3) and chart position (#56 vs unranked). On rating, ratings volume, ads 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

CostPrice · In-app purchases · Ads · Monetization

World Clock Time Zones is free to download; DuoCorder+ costs $2.99 up front. World Clock Time Zones sells 3 one-off in-app purchases. DuoCorder+ asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for World Clock Time Zones against 5.0 for DuoCorder+. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

Scorecard5 real differences · 6 level
World Clock Time Zones versus DuoCorder+: the parameters behind the verdict, then further details
ParameterWorld Clock Time ZonesDuoCorder+
PriceFree — better$2.99
Rating5.0 (2 ratings)5.0 (1 ratings)
Positive reviews80.0% of reviews—
Number of ratings2 — better1
Update frequencyEvery 3 weeks—
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree — betterPaid
Best chart rank—#56 — better
DevicesiPhone, Apple WatchiPhone, iPad
Requires iOS26.017.0 — better
Further details — not scored
Size18 MB1 MB
Age rating4+4+
DeveloperLoam s. r. o.James Roche

Customer experience

World Clock Time Zones

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews5 reviews
Positive80.0%
Neutral0.0%
Negative20.0%

DuoCorder+

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

3 purchases

World Clock Time Zones

One-time3
  • Espresso$0.99
  • Cappuccino$2.99
  • Flat White$3.99
None

DuoCorder+

No in-app purchases

Questions

Is World Clock Time Zones free?
World Clock Time Zones is free to download, with in-app purchases available.
Is DuoCorder+ free?
DuoCorder+ costs $2.99, with no in-app purchases.
Which has better reviews, World Clock Time Zones or DuoCorder+?
World Clock Time Zones and DuoCorder+ are both rated 5.0 out of 5 on the App Store, from 2 and 1 ratings respectively.
Do World Clock Time Zones or DuoCorder+ have ads?
Neither World Clock Time Zones nor DuoCorder+ shows ads.

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