Comparison

Global Time Machine vs RF Power Calculator

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

Head to head
About

Global Time Machine

Visualize all your important time zones on a single, interactive line. Plan meetings and calls across different regions with ease, and see day and night cycles at a glance. Includes calendar integration and automatic location detection.

Highlights
  • World clock for 34,000+ cities
  • Drag to travel in time
  • Day and night at a glance
  • Calendar integration
  • Automatic location detection
  • Offline functionality
Features
Read full description

Global Time Machine shows every time zone you care about on one line. Add your cities, drag any scale and watch them all move together. Made for iPhone Duo: cities and your calendar side by side when open, a desk clock when half-folded. • World clock for 34,000+ cities — search in any language, works offline • Drag to travel in time: plan calls and meetings across time zones • Day and night at a glance: cities where it is night turn dark • Your own place is detected automatically, wherever you travel • Your calendar on the time line — see when you are busy • Half-hour and 45-minute offsets and daylight saving time, always correct • Shake to jump back to now • 12- or 24-hour clock, light and dark themes, 19 languages • Lists (Premium): Separate sets for team, family and friends • Invite a friend: See their local time and when they are busy Free plan: your place and two cities; one friend Premium: Unlimited cities, Lists, Unlimited friends, Find friends in contacts 14-day free trial, then a monthly or yearly subscription. Payment is charged to your Apple ID account. The subscription renews automatically unless it is cancelled at least 24 hours before the end of the current period. You can manage or cancel it in your App Store account settings. Terms of Service: https://thetimemachine.global/terms

About

RF Power Calculator

This app provides essential RF-related calculations for designers and enthusiasts. It includes conversions for series/parallel networks, thermal resistance, units, and VSWR to return loss.

Highlights
  • Series & Parallel Network conversion
  • Thermal resistance calculations
  • Unit conversion (Power, Distance, Ratio)
  • VSWR to Return Loss conversion
Features
Read full description

As Ampleon we share the passion for RF technology which is what we radiate to our customers, suppliers and partners. This application aims at supporting designers and enthusiasts with a lot of common RF-related calculations. Features: Series & Parallel Network conversion Thermal resistance calculations (Junction Temperature, Rth, Thermal Efficiency) Unit conversion (Power, Distance, Ratio) VSWR to Return Loss and Reflection Coefficient conversion

Screenshots

Global Time Machine4 screens
RF Power Calculator4 screens

Verdict

The call

The clearest difference is rating: RF Power Calculator at 5.0 against Global Time Machine's 3.7. RF Power Calculator also leads on in-app purchases (none vs 2) and iOS requirement (9.0 vs 17.0). Global Time Machine's advantage is ratings volume (7 vs 1). On price, 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

Both are free to download. Global Time Machine sells 2 in-app purchases, starting at $0.99 per month. RF Power Calculator asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

RF Power Calculator holds the better App Store score, 5.0 against 3.7. That said, the two scores are not equally well evidenced: Global Time Machine has 7 ratings behind it against 1, so its average is the more settled of the two.

Scorecard5 real differences · 5 level
Global Time Machine versus RF Power Calculator: the parameters behind the verdict, then further details
ParameterGlobal Time MachineRF Power Calculator
PriceFreeFree
Rating3.7 (7 ratings)5.0 (1 ratings) — better
Positive reviews58.3% of reviews—
Number of ratings7 — better1
Update frequencyEvery 5 days—
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, Mac, Apple WatchiPhone, iPad, iPod
Requires iOS17.09.0 — better
Further details — not scored
Size12 MB4 MB
Age rating4+4+
DevelopertheMakeAppTriMM Multimedia B.V.

Customer experience

Global Time Machine

All ratings7 ratings
Positive71.4%
Neutral0.0%
Negative28.6%
Written reviews12 reviews
Positive58.3%
Neutral8.3%
Negative33.3%

RF Power Calculator

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

In-app purchases

2 purchases

Global Time Machine

Subscriptions2
  • Premium · Monthly14 Days trial$0.991 Month
  • Premium · Yearly14 Days trial$9.991 Year
None

RF Power Calculator

No in-app purchases

Questions

Is Global Time Machine free?
Global Time Machine is free to download, with in-app purchases available.
Is RF Power Calculator free?
RF Power Calculator is free to download, with no in-app purchases.
Which has better reviews, Global Time Machine or RF Power Calculator?
RF Power Calculator is rated higher. Global Time Machine averages 3.7 out of 5 from 7 ratings, while RF Power Calculator averages 5.0 from 1 ratings.
Do Global Time Machine or RF Power Calculator have ads?
Neither Global Time Machine nor RF Power Calculator shows ads.

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