iMapGJ vs Offline Map Data Generator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
iMapGJ
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.
- View GIS maps
- City of Grand Junction data
- Mobile access
- Supports iPhone, iPad, iPod
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View the City of Grand Junction GIS maps on your iPad, iPad mini, iPhone, or iPod Touch!
Offline Map Data Generator
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Discover the Ultimate Mapping Experience with Tech Maven Geospatial Unleash the power of geospatial data with Tech Maven Geospatial, your all-in-one mapping solution available now on iOS! Whether you're a seasoned explorer, a professional in the field, or an enthusiast, our app provides unparalleled features to elevate your mapping endeavors. Key Features: 1. Seamless Data Access: Download online mapping URLs, including dynamic and cached mapping services and tile layers. Access ESRI MapServer, FeatureServer, ImageServer, VectorTileServer, PBF/MVT XYZ Vector Tile URLs, OGC API Tiles/XYZ/TMS, and more. Future versions will include downloading capabilities from other providers (OGC WFS/OGC API Features, OGC WMS/OGC API Maps, OGC WMTS). 2. Pre-configured Tile Layers and Conversion Tools: Support for pre-configured tile layers and the ability for ATAK/WINTAK users to import tile.xml configurations. In-app Vector Data Converter: Convert GIS Vector Data to optimized formats like MBTILES Vector Tiles, GPKG Vector Features, GeoJSON, or KML. Compatible with various file formats including ESRI FileGDB, Shapefile, MapInfo, GPX, CSV, and more. 3. Live Event Driven Data Feeds: Stay updated with live data feeds from ESRI FeatureServer, Network Link KML, and GeoRSS Feeds. Download data at specified frequencies and convert to GeoJSON (convertible to KML in-app for ATAK or iTAK). 4. Data Visualization and Sharing: Visualize downloaded data and user-loaded data in the Map Viewer. Supports GeoJSON, raster tiles from MBTILES and GPKG, and vector tiles from MBTILES. 5. Access Tech Maven Geospatial’s Data APIs: Explore our optional purchases to access Tech Maven Geospatial’s data APIs, offering pre-staged data, AOI (Area of Interest/Operation) APIs, Digital Elevation Model Downloaders, and more. Please note: Users are responsible for the terms of use/service and access to the data they download from the provided URLs. For detailed terms and conditions, please refer to our End User License Agreement (EULA): https://offlinedatadownloader.techmaven.net/eula/ Download Tech Maven Geospatial today and embark on your mapping journey with confidence and precision!
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | iMapGJ | Offline Map Data Generator |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (3 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 3 months — better | Every 7 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.2 | 14.0 — better |
| Further details — not scored | ||
| Size | 1 MB | 187 MB |
| Age rating | 4+ | 17+ |
| Developer | City of Grand Junction | Tech Maven GeoSpatial LLC |
In-app purchases
iMapGJ
No in-app purchases
Offline Map Data Generator
- App Subscription7 Days trial$19.991 Year
- OMDG Elevate API7 Days trial$24.991 Year
- OMDG Vector Conversion API7 Days trial$24.991 Year
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- OMDG DEM Downloader$24.997 Days
- Geo Request AOI$49.997 Days
- Offline Map Data Generator7 Days trial$999.991 Year
Questions
Is iMapGJ free?
Is Offline Map Data Generator free?
Do iMapGJ or Offline Map Data Generator have ads?
Which is updated more often, iMapGJ or Offline Map Data Generator?
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