Ntrip checker vs TopLayout
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Ntrip checker
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.
- Test NTRIP Client connection
- Analyze RTCM stream
- Configure connection parameters
- Select mountpoint
- View RTCM message statistics
- See GNSS satellite data
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NtripChecker allows you to test NTRIP Client connection to NTRIP Caster and to analyze the RTCM stream. In the main screen you can define NTRIP connection parameters (host name, port, credentials), user position and select a mountpoint from the list provided by the NTRIP Caster, or set you own mountpoint. Once connected, you can look at the received RTCM messages and their statistics, see list of GNSS satellites and available signal frequencies, and to see the position and distance to the base station providing the corrections.
TopLayout
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This application can communicate with a layout navigator LN Series. By using this, you can perform the layout work of 3 dimensional design data and as-build measurement of 3 dimensional point data. Layout navigator LN Series is pursuing the increase in efficiency of survey work and the ease of using compared with the conventional survey instrument. The update rate of data has realized 20 Hz. So the data delay to the motion of the prism is minimized and the response of guidance to a layout point becomes smooth. Moreover, it can be re-tracked quickly when it failed of tracking the prism. By carrying the self leveling, LN Series can also be used easily by user which is not used to handling of a survey instrument. Main Features of layout navigator LN Series: +Realization of simplification of operation by the limit to the function of layout work and as-build measurement. +Realization of the laborsaving by the measurement by oneself. +Realization of improvement of operational efficiency by the optimal sequence for each of layout work and as-build measurement. +Realization of simplification of instrument setup by the self leveling and visual information of operation steps. https://www.topconpositioning.asia/jp/en/products/brand/topcon/ln-150/ To use this application, the use of location information should be enabled. This application can be used on devices with iOS 16 or higher. Please note that operation on all devices is not guaranteed. Tested Devices: +iPhone 14 Plus(iOS 16.1) +iPhone 14 Pro Max(iOS 17.0.2) +iPhone 16 Pro Max(iOS 18.4) The instruction manual can be downloaded from the TOPCON website.
Screenshots
Verdict
Ntrip checker and TopLayout are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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. Neither carries in-app purchases, so what you see is what you pay.
Ntrip checker ships an update every 4 months, TopLayout every 3 months. The most recent releases landed on October 7, 2026 and October 8, 2026 respectively.
| Parameter | Ntrip checker | TopLayout |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (2 ratings) — better | — |
| Positive reviews | 80.0% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 4 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 14.0 — better |
| Further details — not scored | ||
| Size | 59 MB | 47 MB |
| Age rating | 4+ | 4+ |
| Developer | Navmatix | TOPCON CORPORATION |
In-app purchases
Ntrip checker
No in-app purchases
TopLayout
No in-app purchases







