# Grid Locator Calculator vs hamsfi

The clearest difference is update cadence: hamsfi at every 2 months against Grid Locator Calculator's every 4 months. Grid Locator Calculator's advantage is iOS requirement (10.0 vs 17.6). On price, ads, in-app purchases and device support 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, hamsfi every 2 months. The most recent releases landed on October 22, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Grid Locator Calculator | hamsfi |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | Free | — |
| Size | 22 MB | 2 MB |
| Requires iOS | **10.0** | 17.6 |
| Devices | iPhone, iPod | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Kazunori Watanabe](https://appshunter.io/developer/709465263) | [Scott Earle](https://appshunter.io/developer/696420494) |

## 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


### hamsfi

[App page](https://appshunter.io/ios/app/hamsfi/id6774080740)

**Features:** Apple Watch app

**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 hamsfi free?

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

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

Neither Grid Locator Calculator nor hamsfi shows ads.

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

Grid Locator Calculator ships an update every 4 months, and hamsfi every 2 months. Most recently, Grid Locator Calculator was updated on October 22, 2026 and hamsfi on October 25, 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.*