# Grid Locator Calculator vs VYV Mirror

The clearest difference is in-app purchases: Grid Locator Calculator at none against VYV Mirror's 2. Grid Locator Calculator also leads on iOS requirement (10.0 vs 15.0). VYV Mirror's advantage is update cadence (every 3 days vs every 4 months). On price, ads and device support there is nothing between them.

Both are free to download. VYV Mirror sells 2 in-app purchases, starting at $9.99 per month. Grid Locator Calculator asks for nothing beyond the download.

Grid Locator Calculator ships an update every 4 months, VYV Mirror every 3 days. The most recent releases landed on October 22, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Grid Locator Calculator | VYV Mirror |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 days** |
| Monetization | Free | — |
| Size | 22 MB | 301 MB |
| Requires iOS | **10.0** | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Kazunori Watanabe](https://appshunter.io/developer/709465263) | [Rafael Martins Dos Santos](https://appshunter.io/developer/1864707995) |

## 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


### VYV Mirror

[App page](https://appshunter.io/ios/app/vyv-mirror/id6767212330)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $9.99 | per month |
| Premium Annual | $79.99 | per year |


## Frequently asked questions

### Is Grid Locator Calculator free?

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

### Is VYV Mirror free?

VYV Mirror is free to download, with in-app purchases available.

### Do Grid Locator Calculator or VYV Mirror have ads?

Neither Grid Locator Calculator nor VYV Mirror shows ads.

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

Grid Locator Calculator ships an update every 4 months, and VYV Mirror every 3 days. Most recently, Grid Locator Calculator was updated on October 22, 2026 and VYV Mirror on October 28, 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.*