Comparison

Global Time Machine vs Aviation Weather Decoder

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

Easily track the time in any city worldwide. Add locations to your list to plan international calls, meetings, or connect with loved ones abroad. Features DST support and quick access to nearby hours.

Highlights
  • Track time in over 20,000 cities
  • View nearby hours by scrolling
  • Convenient world clock interface
  • DST support for all locations
  • Shake to reset 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

Aviation Weather Decoder

Features
Read full description

Aviation Weather Decoder is a professional tool for airline pilots and aviation enthusiasts. Decode METAR, TAF, SPECI, and ATIS reports offline. Features: • Camera OCR recognition - snap a photo of printed reports, auto-extract and decode • Manual input - paste raw METAR/TAF text for instant translation • Live queries - fetch real-time METAR, TAF, NOTAM, and ATIS for airports worldwide • Supports METAR (routine weather), TAF (forecast), ATIS (terminal info), SPECI (special reports) • 100% local decoding - all decoding runs on device • History - auto-saves decode results for review • Bilingual UI - Chinese & English • Dark glass-morphism tech UI Premium subscription unlocks full decoding features: 7-day free trial, then $0.99/month auto-renewal. Terms of Use: https://777-9.com/terms.html Privacy Policy: https://777-9.com/privacy.html

Screenshots

Global Time Machine4 screens
Aviation Weather Decoder3 screens

Verdict

The call

The clearest difference is update cadence: Global Time Machine at every 5 days against Aviation Weather Decoder's every 2 months. On price, ads, in-app purchases 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 and Aviation Weather Decoder sells 1 in-app purchase, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Global Time Machine ships an update every 5 days, Aviation Weather Decoder every 2 months. The most recent releases landed on November 6, 2026 and October 24, 2026 respectively.

Scorecard1 real difference · 9 level
Global Time Machine versus Aviation Weather Decoder: the parameters behind the verdict, then further details
ParameterGlobal Time MachineAviation Weather Decoder
PriceFreeFree
Rating3.7 (7 ratings) — better—
Positive reviews58.3% of reviews—
Number of ratings7 — better—
Update frequencyEvery 5 days — betterEvery 2 months
AdsNoNo
In-app purchasesYesYes
MonetizationFree—
DevicesiPhone, Mac, Apple Watch — betteriPhone, iPad
Requires iOS17.017.0
Further details — not scored
Size12 MB8 MB
Age rating4+4+
DevelopertheMakeApp阳 何

In-app purchases

2 purchases

Global Time Machine

Subscriptions2
  • Premium · Monthly14 Days trial$0.991 Month
  • Premium · Yearly14 Days trial$9.991 Year
1 purchases

Aviation Weather Decoder

Subscriptions1
  • Metar Decoder Premium7 Days trial$0.991 Month

Questions

Is Global Time Machine free?
Global Time Machine is free to download, with in-app purchases available.
Is Aviation Weather Decoder free?
Aviation Weather Decoder is free to download, with in-app purchases available.
Do Global Time Machine or Aviation Weather Decoder have ads?
Neither Global Time Machine nor Aviation Weather Decoder shows ads.
Which is updated more often, Global Time Machine or Aviation Weather Decoder?
Global Time Machine ships an update every 5 days, and Aviation Weather Decoder every 2 months. Most recently, Global Time Machine was updated on November 6, 2026 and Aviation Weather Decoder on October 24, 2026.

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