Grid vs RTKapp
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Grid
This app provides accurate location data in MGRS/USNG and lat/lon formats, along with altitude, course, and speed. It features a satellite map, a coordinate converter, and options to adjust grid accuracy and units. Location updates can be toggled to conserve battery.
- MGRS/USNG and lat/lon coordinates
- Altitude, course, and speed display
- Satellite map view
- Coordinate converter (DMS, MGRS, UTM)
- Adjustable grid accuracy
- Toggleable location updates
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Grid Nav gives you accurate location data in angular geographic coordinates and in Military Grid Reference System (MGRS)/USNG format. Perfect for Land Nav. Simple to use without a bunch of clutter to get in your way so you can get the information you need quickly. Completely re-written from Grid Nav2 to provide the latest in accuracy & power savings. Features: - easily get your current coordinates in lat/lon and MGRS format as well as altitude, course, and speed - the ability to turn on & off location updates to save battery - satellite map of your location - a converter to change between degrees or degrees, minutes, seconds (DMS) and MGRS & UTM - change between ft/mph and m/kph - change the displayed grid accuracy (8, 10, or 12 digit grid) ***Privacy Information*** Absolutely NO user data is taken, stored or transmitted by this application (unlike the other “nav” apps you have on your phone right now)
RTKapp
Achieve centimeter-level GNSS precision directly on your mobile device. Connect receivers, process raw data in real-time or post-processing, and analyze results with advanced plotting tools. This app offers professional surveying workflows without the need for desktop software, prioritizing local data processing and privacy.
- Real-time RTK positioning
- Post-processing (PPK/PPP)
- NTRIP Client and Caster Management
- Raw data logging and RINEX conversion
- Live quality metrics and skyplot
- Analytical plotting tools
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Welcome to RTKapp --------------------- Centimeter Precision in your Pocket RTKapp is the ultimate solution for surveyors, engineers, and GNSS enthusiasts who need professional workflows without the burden of desktop software. Connect, record, process, and analyze satellite data directly from your iPhone or iPad in a fast, private, and powerful way. Powered by the robust RTKLIB engine (Demo5), RTKapp allows you to execute RTK positioning, Post-Processing (PPK/PPP), and raw data conversion in seconds, wrapped in a modern, streamlined interface. REAL-TIME RTK ---------------- - Total Connectivity: Connect your GNSS receiver via Bluetooth (BLE) or TCP, or get network corrections through the built-in NTRIP Client. - Live Quality Metrics: Monitor your signal status in real-time with AR ratio, HRMS/VRMS, DOP, SNR (Signal-to-Noise Ratio), and Skyplot views. - VRS Support: Works seamlessly with Virtual Reference Stations by automatically sending your configured position (GGA) to the caster. - Transparent Recording: Natively capture and log raw data streams from the Rover, Base, and corrections simultaneously while you measure. INSTANT POST-PROCESSING ------------------------------ - Load your observation (Rover/Base) and navigation files on the fly. - Execute kinematic, static, or precise point positioning (PPP) with advanced algorithms. - Analytical Plotting: Dive deep with E/N/U position graphs, horizontal scatter plots, cycle slip detection, and post-fit phase residuals to ensure maximum survey-grade quality. FIELD PRO TOOLS ------------------- - RINEX Converter: Import binary logs from RTCM3 and export them to universal RINEX format with advanced versioning and frequency selections (L1/L2/L5). - NTRIP Caster Management: Browse sourcetables, save profiles for your favorite VRS networks, and even share data by forwarding corrections via Bluetooth. - Configuration Profiles: Save your processing settings, elevation masks, and ambiguity resolution parameters into custom profiles for instant field readiness. LOCAL PRIVACY FIRST ----------------------- Your data belongs to you. RTKapp processes all positioning locally right on your device. We do not rely on the cloud to calculate your position, we don't track your projects, and all exports to GPX, KML, CSV, or .pos coordinate files are performed purely on-demand. Master GNSS precision anywhere, no laptop required. Download RTKapp and streamline your data collection and processing today!
Screenshots
Verdict
The clearest difference is price: RTKapp at Free against Grid's $0.99. RTKapp also leads on rating (5.0 vs 3.7) and update cadence (every 3 weeks vs every 5 months). Grid's advantage is ratings volume (3 vs 1) and iOS requirement (9.0 vs 17.0). On ads, in-app purchases and device support 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
RTKapp is free to download; Grid costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
RTKapp holds the better App Store score, 5.0 against 3.7. Both are backed by a comparable volume of ratings — 3 and 1 respectively.
Grid ships an update every 5 months, RTKapp every 3 weeks. The most recent releases landed on November 6, 2026 and October 31, 2026 respectively.
| Parameter | Grid | RTKapp |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 3.7 (3 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 3 — better | 1 |
| Update frequency | Every 5 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 9.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 16 MB | 93 MB |
| Age rating | 4+ | 4+ |
| Developer | Matt Kaili | Juan Carlos Lopez Calvo |
In-app purchases
Grid
No in-app purchases
RTKapp
No in-app purchases









