# Grid Locator Calculator vs SWLog

The clearest difference is review sentiment: Grid Locator Calculator at 100% against SWLog's 25%. Grid Locator Calculator also leads on iOS requirement (10.0 vs 16.1). SWLog's advantage is update cadence (fortnightly vs every 4 months). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Grid Locator Calculator ships an update every 4 months, SWLog fortnightly. The most recent releases landed on October 22, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Grid Locator Calculator | SWLog |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/swlog/id6452913390/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | **100.0% of reviews** | 25.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Fortnightly** |
| Monetization | Free | Free |
| Size | 22 MB | 305 MB |
| Requires iOS | **10.0** | 16.1 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Kazunori Watanabe](https://appshunter.io/developer/709465263) | [Robert Sillett](https://appshunter.io/developer/1699114535) |

## What reviewers say

### Grid Locator Calculator

[App page](https://appshunter.io/ios/app/grid-locator-calculator/id714086890)

This app helps Amateur Radio operators quickly find their Maidenhead Grid Locator reference using their iPhone's GPS. It works offline and provides 10-digit locators, which can be truncated to 4 or 6 digits as needed. Ideal for portable operations in unfamiliar locations.

**Highlights:** Calculates 10-digit grid locators, Uses iPhone GPS, Offline functionality, Supports 4, 6, and 10-digit locators, Ideal for portable operations

**Features:** macOS Compatibility

**In-app purchases:** none


### SWLog

[App page](https://appshunter.io/ios/app/swlog/id6452913390)

Log amateur radio QSOs and broadcast transmissions on your mobile device. Supports QRZ lookups and various broadcast schedule queries for station identification. Features GPS integration and local log browsing, with the ability to upload to a main logging program.

**Highlights:** Log amateur radio QSOs, Log broadcast transmissions, QRZ lookups, Broadcast schedule lookups, GPS integration, Upload logs to main program

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Grid Locator Calculator free?

Grid Locator Calculator is free to download, with no in-app purchases.

### Is SWLog free?

SWLog is free to download, with no in-app purchases.

### Do Grid Locator Calculator or SWLog have ads?

Neither Grid Locator Calculator nor SWLog shows ads.

### Which is updated more often, Grid Locator Calculator or SWLog?

Grid Locator Calculator ships an update every 4 months, and SWLog fortnightly. Most recently, Grid Locator Calculator was updated on October 22, 2026 and SWLog on October 30, 2026.

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