Comparison

topoXpress vs RTKapp

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

topoXpress

This application provides robust GIS and surveying tools for field data collection and analysis. It supports both online and offline operations with a wide range of spatial data formats and powerful visualization functions. Designed for professionals, it facilitates collaborative mapping and extensive GNSS receiver integration.

Highlights
  • Multiplatform GIS and surveying functionality
  • Handles large spatial datasets (raster/vector)
  • Online and offline data operation
  • Powerful GIS visualization functions
  • Productive data collection tools
  • Collaborative mapping via cloud service
  • Extensive GNSS receiver support
Features
Read full description

topoXpress provides the following features: • Multiplatform design: the same software with the same rich functionality for both GIS data collectors and Surveyors on iOS & macOS. • Handling and displaying large spatial datasets (raster and vector). • Responsive and intuitive user interface: easy to learn and use, automatic adjustment to different screen sizes, orientations, and resolutions of mobile (iPhone, iPad) and desktop devices. • Online and offline operation: online data sources (Cloud storage, TMS, WMS, KML), offline raster datasets (jpeg, ecw, ers, tiff, png, lan, bil, ENVI bsq), offline vector datasets (shp, dxf, map, GeoJSON, mif, txt, crd, dat, dbf, tab, mid). • Powerful GIS visualization functions: thematic mapping, transparency, labeling, query, layer groups, vector symbols, line types, fill types, event mapping. • Productive data collection: templates, surveying, stakeout, CoGo (Coordinate Geometry), forms, lists, calculated fields, GIS editing functions, sampling tool, and more. • Collaborative mapping for professional users through the topoXpress cloud service. • Extensive support of GNSS receivers through TCP port & Bluetooth, projection systems, geoids, shift grids. Bluetooth Rangefinder support for CoGo tasks. The app can be used in many different sectors: • Field data collection and inspection • Land Surveying • Topographic mapping • Forestry • Farm mapping • Utility mapping and inspection • Archeology *** NOTE: topoXpress offers all specified GIS functions free of charge. However, loading more than 10.000 records, saving and exporting your job can be done through our cloud service. Please visit our website for further details: https://topoXpress.com **NOTE ON BATTERY USAGE: The app may dramatically decrease battery life during the use with large spatial datasets. The app supports optional background location services, which can may cause a faster battery drain than usual.

About

RTKapp

Features
Read full description

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

topoXpress4 screens
RTKapp4 screens

Verdict

The call

topoXpress and RTKapp 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

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

topoXpress ships an update every 5 weeks, RTKapp every 3 weeks. The most recent releases landed on June 4, 2026 and September 13, 2026 respectively.

ScorecardNo meaningful differences
topoXpress versus RTKapp: the parameters behind the verdict, then further details
ParametertopoXpressRTKapp
PriceFreeFree
Rating4.0 (3 ratings) — better—
Number of ratings3 — better—
Update frequencyEvery 5 weeksEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.517.0 — better
Further details — not scored
Size27 MB93 MB
Age rating4+4+
DeveloperTopoLynx GIS & Mapping LtdJuan Carlos Lopez Calvo

In-app purchases

None

topoXpress

No in-app purchases

None

RTKapp

No in-app purchases

Questions

Is topoXpress free?
topoXpress is free to download, with no in-app purchases.
Is RTKapp free?
RTKapp is free to download, with no in-app purchases.
Do topoXpress or RTKapp have ads?
Neither topoXpress nor RTKapp shows ads.
Which is updated more often, topoXpress or RTKapp?
topoXpress ships an update every 5 weeks, and RTKapp every 3 weeks. Most recently, topoXpress was updated on June 4, 2026 and RTKapp on September 13, 2026.

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