# GridNav vs TacMap

The clearest difference is iOS requirement: TacMap at 16.3 against GridNav's 18.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. GridNav sells 1 one-off in-app purchase and TacMap sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

GridNav ships an update every 6 days, TacMap weekly. Both last shipped on November 5, 2026.

## The numbers

| Metric | GridNav | TacMap |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/gridnav-mgrs-land-nav-gps/id6768683465/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 6 days** | Weekly |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 13 MB | 10 MB |
| Requires iOS | 18.0 | **16.3** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [BigBalli Consulting llc](https://appshunter.io/developer/363765325) | [Christian Brooker](https://appshunter.io/developer/484019214) |

## What reviewers say

### GridNav

[App page](https://appshunter.io/ios/app/gridnav-mgrs-land-nav-gps/id6768683465)

Easily convert and display MGRS, UTM, and lat-lon coordinates on a map, even without a signal. This app is designed for quick grid-to-map conversion and navigation, with features like offline maps and a night mode.

**Highlights:** Real-time coordinate display (MGRS, UTM, lat-lon), Paste and plot grid coordinates on map, Offline map downloads (OpenStreetMap, USGS topo), Adjustable coordinate precision and display order, Waypoint saving and navigation, Red on black night mode, One-handed operation and glove-friendly design

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro | $12.99 | one-time |


### TacMap

[App page](https://appshunter.io/ios/app/tacmap/id6773175573)

This offline map application allows users to import various map formats and navigate without an internet connection. It offers tools for planning, recording routes, and collaborating with teams through encrypted sharing. Data is stored securely on the device.

**Highlights:** Offline map import (PDF, GeoPDF, MBTiles), MGRS, UTM, Lat/Lon positioning, Waypoint creation and layer organization, Route recording and GPX export, End-to-end encrypted team sync, Red night mode

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock App | $9.99 | one-time |


## Frequently asked questions

### Is GridNav free?

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

### Is TacMap free?

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

### Do GridNav or TacMap have ads?

Neither GridNav nor TacMap shows ads.

### Which is updated more often, GridNav or TacMap?

GridNav ships an update every 6 days, and TacMap weekly. Most recently, GridNav was updated on November 5, 2026 and TacMap on November 5, 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.*