# Topcon Field Mobile vs Ntrip checker

The clearest difference is review sentiment: Ntrip checker at 80% against Topcon Field Mobile's 14%. Ntrip checker also leads on rating (4.0 vs 3.5). Topcon Field Mobile's advantage is monetization model (free vs ad-supported) and ratings volume (17 vs 2). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Ntrip checker holds the better App Store score, 4.0 against 3.5. That said, the two scores are not equally well evidenced: Topcon Field Mobile has 17 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 14% of Topcon Field Mobile's written reviews are positive against 80% of Ntrip checker's.

Both ship on a similar rhythm, roughly every 4 months. The most recent releases landed on July 17, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | Topcon Field Mobile | Ntrip checker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.5 (17 ratings)](https://appshunter.io/ios/app/topcon-field-mobile/id1029831646/reviews) | **[4.0 (2 ratings)](https://appshunter.io/ios/app/ntrip-checker/id1459504498/reviews)** |
| Number of ratings | **17** | 2 |
| Positive reviews | 14.3% of reviews | **80.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | Every 4 months |
| Monetization | **Free** | Ad-supported |
| Size | 609 MB | 59 MB |
| Requires iOS | 16.0 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Topcon Positioning Systems, Inc.](https://appshunter.io/developer/667040500) | [Navmatix](https://appshunter.io/developer/921372764) |

## What reviewers say

### Topcon Field Mobile

[App page](https://appshunter.io/ios/app/topcon-field-mobile/id1029831646)

This app facilitates precise design layout and field measurements using Topcon/Sokkia Total Stations and GNSS receivers. It offers real-time positioning for guided navigation to project points and secure file exchange through a company account.

**Highlights:** Precise design layout, Field measurements, Assisted navigation, Real-time positioning, Secure file exchange, Company account login

**Features:** macOS Compatibility

**In-app purchases:** none


### Ntrip checker

[App page](https://appshunter.io/ios/app/ntrip-checker/id1459504498)

This app tests NTRIP Client connections to NTRIP Casters and analyzes RTCM streams. It allows users to configure connection parameters, select mountpoints, and view received RTCM messages, satellite data, and base station proximity.

**Highlights:** Test NTRIP Client connection, Analyze RTCM stream, Configure connection parameters, Select mountpoint, View RTCM message statistics, See GNSS satellite data

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Topcon Field Mobile free?

Topcon Field Mobile is free to download, with no in-app purchases.

### Is Ntrip checker free?

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

### Which has better reviews, Topcon Field Mobile or Ntrip checker?

Ntrip checker is rated higher. Topcon Field Mobile averages 3.5 out of 5 from 17 ratings, while Ntrip checker averages 4.0 from 2 ratings.

### Do Topcon Field Mobile or Ntrip checker have ads?

Neither Topcon Field Mobile nor Ntrip checker shows ads.

### Which is updated more often, Topcon Field Mobile or Ntrip checker?

Topcon Field Mobile ships an update every 4 months, and Ntrip checker every 4 months. Most recently, Topcon Field Mobile was updated on July 17, 2026 and Ntrip checker on September 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.*