# iMapGJ vs Topo Lock Maps

The clearest difference is in-app purchases: iMapGJ at none against Topo Lock Maps's 2. iMapGJ also leads on iOS requirement (15.2 vs 17.0). Topo Lock Maps's advantage is update cadence (fortnightly vs every 3 months). On price, rating, review sentiment and ratings volume there is nothing between them.

Both are free to download. Topo Lock Maps sells 2 in-app purchases, starting at $9.99 per month. iMapGJ asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for iMapGJ against 5.0 for Topo Lock Maps. Both are backed by a comparable volume of ratings — 3 and 6 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

iMapGJ ships an update every 3 months, Topo Lock Maps fortnightly. The most recent releases landed on June 7, 2026 and June 20, 2026 respectively.

## The numbers

| Metric | iMapGJ | Topo Lock Maps |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (3 ratings)](https://appshunter.io/ios/app/imapgj/id773519142/reviews) | [5.0 (6 ratings)](https://appshunter.io/ios/app/topo-lock-maps/id6465455085/reviews) |
| Number of ratings | 3 | **6** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Fortnightly** |
| Monetization | **Free** | Freemium |
| Size | 1 MB | 19 MB |
| Requires iOS | **15.2** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [City of Grand Junction](https://appshunter.io/developer/773519145) | [VonCannon Technology, Incorporated](https://appshunter.io/developer/567643624) |

## 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


### Topo Lock Maps

[App page](https://appshunter.io/ios/app/topo-lock-maps/id6465455085)

This app provides private and secure outdoor navigation with end-to-end encryption. It focuses on user privacy, offering offline maps without tracking or data mining. Enjoy a distraction-free experience designed for various outdoor activities.

**Highlights:** End-to-end encryption, No ads or tracking, Offline maps with no expiration, Fast offline downloads, Local and offline first performance, Battery friendly optimization

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $9.99 | per month |
| Pro Yearly | $99.99 | per year |


## Frequently asked questions

### Is iMapGJ free?

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

### Is Topo Lock Maps free?

Topo Lock Maps is free to download, with in-app purchases available.

### Which has better reviews, iMapGJ or Topo Lock Maps?

iMapGJ and Topo Lock Maps are both rated 5.0 out of 5 on the App Store, from 3 and 6 ratings respectively.

### Do iMapGJ or Topo Lock Maps have ads?

Neither iMapGJ nor Topo Lock Maps shows ads.

### Which is updated more often, iMapGJ or Topo Lock Maps?

iMapGJ ships an update every 3 months, and Topo Lock Maps fortnightly. Most recently, iMapGJ was updated on June 7, 2026 and Topo Lock Maps on June 20, 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.*