RTK Position

RTK Position turns your Android phone into a centimetre-accurate GPS device.

It captures raw GNSS carrier-phase measurements, applies Real-Time Kinematic (RTK) corrections streamed live from any NTRIP caster (rtk2go, your own base station, national CORS networks), and injects a high-precision mock location into Android — available to every navigation and mapping app on your device.

── WHAT IS RTK? ───────────────────────────────────────

Standard GPS is accurate to 2–5 metres. RTK uses a fixed reference station and carrier-phase mathematics to resolve positioning down to 1–3 cm horizontally. The same technology powers professional survey equipment; RTK Position brings it to compatible Android hardware.

── FEATURES ───────────────────────────────────────────

• Live RTK fix — SPP → Float → Fixed solution display with σH, satellite count and age of corrections

• Satellite skyplot — compass-oriented with C/N₀ colour bars and constellation labels

• NTRIP client — connects to any NTRIP 1.0/2.0 caster; automatic reconnect with backoff

• Validation mode — measure your position precision: σE/σN/σU, CEP50, CEP95, DRMS, error ellipse

• Mock location injection — replaces Android GPS provider with the RTK solution; works with Google Maps, OSMAnd, QGIS Mobile, and more

• Debug log — capture and share diagnostic logs directly from the app

── PRO FEATURES ───────────────────────────────────────

Unlock with a single one-time purchase:

• Unlimited NTRIP profiles (free tier: one profile)

• Mountpoint browser — fetch the source table and pick the nearest base station by distance

• Full session history — review every validation run

• E/N/U time series chart — see position drift over time

• CSV export — share raw sample data for post-processing

• Advanced engine settings — constellation toggles, elevation mask, GLONASS AR

• Raw GNSS data logging

── REQUIREMENTS ───────────────────────────────────────

• Android 8.0 (API 26) or newer

• Phone with raw GNSS measurement support (carrier phase)

Confirmed: Pixel 4+, Samsung Galaxy S20/S21+, Snapdragon 855+ devices

• Developer Options → Mock Location app must be set to RTK Position

• NTRIP caster account (rtk2go.com is free to use)

── PRIVACY ────────────────────────────────────────────

Location data is used solely for RTK positioning and is never uploaded or shared. Firebase Crashlytics collects anonymised crash reports. No account required.