# GMT Time vs SD360 W&B

The clearest difference is in-app purchases: SD360 W&B at none against GMT Time's 1. SD360 W&B also leads on update cadence (fortnightly vs every 28 months) and rating (5.0 vs 4.7). GMT Time's advantage is ratings volume (38 vs 3). On price and device support there is nothing between them.

Both are free to download. GMT Time sells 1 one-off in-app purchase. SD360 W&B asks for nothing beyond the download.

SD360 W&B holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: GMT Time has 38 ratings behind it against 3, so its average is the more settled of the two.

GMT Time ships an update every 28 months, SD360 W&B fortnightly. Both last shipped on November 3, 2026.

## The numbers

| Metric | GMT Time | SD360 W&B |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (38 ratings)](https://appshunter.io/ios/app/gmt-time/id1613023691/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/sd360-w-and-b/id6446126287/reviews)** |
| Number of ratings | **38** | 3 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | — |
| Update frequency | Every 28 months | **Fortnightly** |
| Monetization | Ad-supported | **Free** |
| Size | 26 MB | 10 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [MingChun Chien](https://appshunter.io/developer/1181368598) | [Semere Tadesse](https://appshunter.io/developer/1676147092) |

## What reviewers say

### GMT Time

[App page](https://appshunter.io/ios/app/gmt-time/id1613023691)

This app provides accurate GMT time using NTP protocol and TrueTime framework. It offers a timekeeping function, allows setting time between two locations for itineraries, and supports multiple languages. Enjoy precise timekeeping with 1/100 second accuracy.

**Highlights:** Accurate GMT time display, NTP and TrueTime framework integration, Timekeeping function (on/off), Set time between two locations, Multi-language support (English, Japanese, Chinese, Cantonese), 1/100 second accuracy

**Features:** macOS Compatibility, Vision Pro support, iPhone Duo support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Time117 Pro | $0.99 | one-time |


### SD360 W&B

[App page](https://appshunter.io/ios/app/sd360-w-and-b/id6446126287)

This utility app calculates an aircraft's center of gravity (CG) and ensures weight distribution is within safe limits. It displays critical weight information, including total aircraft weight, payload weight, and payload bulk percentage.

**Highlights:** CG calculation, Weight limit checks, Total weight display, Payload weight display, Payload bulk percentage

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is GMT Time free?

GMT Time is free to download, with in-app purchases available.

### Is SD360 W&B free?

SD360 W&B is free to download, with no in-app purchases.

### Which has better reviews, GMT Time or SD360 W&B?

SD360 W&B is rated higher. GMT Time averages 4.7 out of 5 from 38 ratings, while SD360 W&B averages 5.0 from 3 ratings.

### Which is updated more often, GMT Time or SD360 W&B?

GMT Time ships an update every 28 months, and SD360 W&B fortnightly. Most recently, GMT Time was updated on November 3, 2026 and SD360 W&B on November 3, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*