# iMapGJ vs Offline Map Data Generator

The clearest difference is in-app purchases: iMapGJ at none against Offline Map Data Generator's 6. iMapGJ also leads on update cadence (every 3 months vs every 7 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Offline Map Data Generator sells 6 in-app purchases, starting at $19.99 per year. iMapGJ asks for nothing beyond the download.

iMapGJ ships an update every 3 months, Offline Map Data Generator every 7 months. The most recent releases landed on October 6, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | iMapGJ | Offline Map Data Generator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/imapgj/id773519142/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 7 months |
| Monetization | Free | — |
| Size | 1 MB | 187 MB |
| Requires iOS | 15.2 | **14.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [City of Grand Junction](https://appshunter.io/developer/773519145) | [Tech Maven GeoSpatial LLC](https://appshunter.io/developer/1459067502) |

## What reviewers say

### iMapGJ

[App page](https://appshunter.io/ios/app/imapgj/id773519142)

Access and view Geographic Information System (GIS) maps for the City of Grand Junction. This application is designed for mobile devices, providing map data on the go.

**Highlights:** View GIS maps, City of Grand Junction data, Mobile access, Supports iPhone, iPad, iPod

**Features:** macOS Compatibility

**In-app purchases:** none


### Offline Map Data Generator

[App page](https://appshunter.io/ios/app/offline-map-data-generator/id6448957147)

**Features:** macOS Compatibility

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| App Subscription | $19.99 | per year |
| OMDG Elevate API | $24.99 | per year |
| OMDG Vector Conversion API | $24.99 | per year |
| OMDG DEM Downloader | $24.99 | per 7 days |
| Geo Request AOI | $49.99 | per 7 days |
| Offline Map Data Generator | $999.99 | per year |


## Frequently asked questions

### Is iMapGJ free?

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

### Is Offline Map Data Generator free?

Offline Map Data Generator is free to download, with in-app purchases available.

### Do iMapGJ or Offline Map Data Generator have ads?

Neither iMapGJ nor Offline Map Data Generator shows ads.

### Which is updated more often, iMapGJ or Offline Map Data Generator?

iMapGJ ships an update every 3 months, and Offline Map Data Generator every 7 months. Most recently, iMapGJ was updated on October 6, 2026 and Offline Map Data Generator on September 22, 2026.

---

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