# CalTopo vs Offline Map Data Generator

The clearest difference is in-app purchases: CalTopo at none against Offline Map Data Generator's 6. CalTopo also leads on update cadence (every 2 weeks vs every 7 months) and chart position (#145 vs unranked). Offline Map Data Generator's advantage is iOS requirement (14.0 vs 16.0). On price, ads and device support 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. CalTopo asks for nothing beyond the download.

CalTopo ships an update every 2 weeks, Offline Map Data Generator every 7 months. The most recent releases landed on October 18, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | CalTopo | Offline Map Data Generator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (7.5K ratings)](https://appshunter.io/ios/app/caltopo-backcountry-mapping/id1460038458/reviews)** | — |
| Number of ratings | **7.5K** | — |
| Positive reviews | 56.5% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 7 months |
| Monetization | Free | — |
| Best chart rank | **#145** | — |
| Size | 165 MB | 187 MB |
| Requires iOS | 16.0 | **14.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [CalTopo LLC](https://appshunter.io/developer/1460038457) | [Tech Maven GeoSpatial LLC](https://appshunter.io/developer/1459067502) |

## What reviewers say

### CalTopo

[App page](https://appshunter.io/ios/app/caltopo-backcountry-mapping/id1460038458)

**Currently charting:** #145 Top Free · Navigation (US App Store)

Plan and navigate off-grid adventures with detailed offline maps and real-time weather forecasts. Trusted by professionals, this app offers seamless syncing and collaborative planning for backcountry pursuits.

**Highlights:** Offline map downloads, Satellite imagery, Route planning, GPS tracking, Weather forecasting, Collaborative map sharing, Slope angle shading

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🚀 Powerful mapping features
- 💡 Extensive data layers
- 👍 Detailed trail and terrain information
- 👍 Useful for SAR operations
- 👍 Great for planning outdoor adventures

**What reviewers complain about**

- 🐛 Buggy and unstable mobile app
- 🐛 Maps not always loading properly
- 🐛 Slow map rendering
- 🔋 High battery consumption
- 👎 Difficult to use for casual users

**Reported bugs**

- Trails and tracks disappearing
- Coordinate display issues
- Frequent app crashes and freezes
- Incompatibility with older devices

**Requested features**

- Add 3D map view
- Implement route snapping to trails
- Improve offline map download capabilities
- Add photo geotagging functionality
- Implement course-up map orientation


### 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 CalTopo free?

CalTopo 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 CalTopo or Offline Map Data Generator have ads?

Neither CalTopo nor Offline Map Data Generator shows ads.

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

CalTopo ships an update every 2 weeks, and Offline Map Data Generator every 7 months. Most recently, CalTopo was updated on October 18, 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.*