# RTKapp — GNSS RTK based on RTKLIB > GNSS RTK based on RTKLIB (iPhone/iPad app by Juan Carlos Lopez Calvo.) - Source: https://appshunter.io/ios/app/rtkapp/id6759115701 (this page in markdown: same URL + `.md`) - Developer: [Juan Carlos Lopez Calvo](https://appshunter.io/developer/1876960144) - Category: Navigation - Price: Free - Age rating: 4+ - Requires: iOS 17.0 · 93 MB - Languages: English, Japanese, Chinese, Spanish - Released: 2026-02-26 - Data updated: 2026-06-28 - User reviews in markdown: https://appshunter.io/ios/app/rtkapp/id6759115701/reviews.md ## What is RTKapp? 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! ## Version history (last 4 releases) ### 1.1.2 — 2026-06-27 - Improved RTK startup stability on physical iPhone devices. - More robust real-time NTRIP stream startup and handling. - Added stronger fallback/redundancy for correction source continuity. - Better tolerance to RTCM stream format variations. ### 1.1.1 — 2026-03-28 Bug fixes and improvements: • Fixed buttons not visible in Dark Mode during onboarding demo • Fixed NTRIP connection status showing "Disconnected" while data is actively flowing • Fixed Track map zoom resetting every time a new position arrives — you can now pan and zoom freely • Fixed scatter plot legend colors to match actual RTK fix type colors • Renamed "Error N/E/U" plot to "Displacement N/E/U" — better reflects real-world use (measuring distances and movements) • Added pinch-to-zoom on the Displacement time series chart • Time series charts now scroll to the current moment when opened • Moved live demo from La Gomera (Canary Islands) to Madrid for more stable RTK convergence ### 1.1.0 — 2026-03-16 - Interactive guided onboarding with a live RTK demo using real CORS stations — see centimeter positioning working before you start - New map button to set your current position as the reference point for error plots - Post-processing now works exclusively from recorded real-time sessions — file upload removed for a cleaner mobile workflow - Location permission status now shown in real time during onboarding (allowed / not allowed) - Pinch-to-zoom and pan enabled on the demo map ### 1.0.1 — 2026-02-26 No release notes. ## Apps similar to RTKapp | App | Rating | Price | Category | | --- | --- | --- | --- | | [SailTimer API™](https://appshunter.io/ios/app/sailtimer-api/id1562869275) | 5.0 (1) | Free | Navigation | | [iCMTGIS PRO](https://appshunter.io/ios/app/icmtgis-pro/id1005401426) | 4.9 (7) | $299.99 | Navigation | | [Stakeout iCMT](https://appshunter.io/ios/app/stakeout-icmt/id594397808) | 2.6 (5) | $14.99 | Navigation | | [RTK Helper](https://appshunter.io/ios/app/rtk-helper/id6755748761) | 5.0 (1) | $0.99 | Navigation | | [GL Connect](https://appshunter.io/ios/app/gl-connect/id6621263718) | — | Free | Navigation | | [topoXpress](https://appshunter.io/ios/app/topoxpress/id1500467308) | 4.0 (3) | Free | Navigation | ## Related topics [rtkapp](https://appshunter.io/ios/topics/rtkapp) · [rtk](https://appshunter.io/ios/topics/rtk) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-28.*