TopoXY: Coordinate Converter

Stereo70, PUWG, UTM to WGS84

Free · In‑App Purchases · Designed for iPad. Not verified for macOS.

Pick your country once and TopoXY loads the right national grid. Convert both ways, measure distance, azimuth and area, then read the terrain. Runs on your iPhone. TopoXY is a coordinate toolkit for surveyors, civil engineers and GIS professionals working in Romania, Poland, Czechia, Slovakia, Italy and Germany. Pick your country once. TopoXY loads the right coordinate reference system and keeps it for every conversion, calculation and map you open. SUPPORTED COORDINATE SYSTEMS - Romania: Stereo 70, EPSG:3844 - Poland: PUWG 1992, EPSG:2180 - Czechia and Slovakia: S-JTSK / Krovak, EPSG:5514 - Italy: Gauss-Boaga, EPSG:3004 - Germany: ETRS89 / UTM zone 32N, EPSG:25832 Conversions run on your iPhone through the PROJ library, the same engine behind professional desktop GIS. They need no signal and no account, which matters when the site has no coverage. The map and elevation lookups do query online services, so those send the position you are viewing. WHAT YOU CAN DO - Convert between your national grid and WGS 84, both directions - Enter several points and convert them together - Measure distance and azimuth between two points - Calculate area and perimeter for a set of points - See every point on an interactive map: standard, hybrid or satellite - Open any point in Apple Maps for navigation - Read terrain slope and gradient at a location ABOUT ACCURACY Each country has its own accuracy tier and the app shows yours before you convert. Italy ships without an NTv2 grid, so results there sit in the widest tier. Check a control point you already know before you rely on any tool, this one included. We would rather you test us than trust us. BUILT FOR THE FIELD Seven languages: English, Romanian, Polish, Czech, Slovak, Italian and German. Dark mode. Every result two taps away, because you are holding a phone in one hand. Download TopoXY and stop retyping coordinates into a desktop you left at the office. SUBSCRIPTION DETAILS TopoXY Pro is an auto-renewing subscription. New subscribers start with a 3 day free trial. After the trial it renews weekly, or monthly if you pick that plan, at the price shown in the app for your region, charged to your Apple Account at confirmation of purchase. It renews automatically for the same price and period unless auto-renew is turned off at least 24 hours before the end of the current period. Manage or cancel any time in Settings, tap your name, then Subscriptions. Any unused portion of a free trial is forfeited when you buy a subscription. Privacy Policy: https://topoxyapp.com/privacy.html Terms of Use: https://topoxyapp.com/terms.html EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Ratings & Reviews

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Fixes from the field, in every supported country. COORDINATE ENTRY Czechia and Slovakia: the fields now accept the values S-JTSK actually produces. What could not be typed before works. A new point no longer inherits the previous point's numbers. Import works outside Romania too. MAP AND SPEED The map opens centred where it should. Conversions and map screens respond faster, because the network work moved off the interface thread. ACCURACY The tier shown before each conversion now matches what the app can really deliver, and the app and the website say the same thing. SUBSCRIPTION The subscription screen is reachable again from every entry point. All seven languages reviewed and corrected.

Version 1.71

The developer, Darius Cirjan, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Used to Track You

    The following data may be used to track you across apps and websites owned by other companies:

    • Location
    • Identifiers
    • Usage Data

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Purchases
    • Location
    • Identifiers
    • Usage Data
    • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Seller
  • Darius Cirjan
Size
  • 48.2 MB
Category
  • Navigation
Compatibility
Requires iOS 17.0 or later.
  • iPhone
    Requires iOS 17.0 or later.
  • iPad
    Requires iPadOS 17.0 or later.
  • Mac
    Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
Languages
English and 6 more
  • English, Czech, German, Italian, Polish, Romanian, Slovak
Age Rating
4+
In-App Purchases
Yes
Copyright
  • © Copyright (c) 2026 - All Rights Reserved iOS All Apps, Darius Cirjan
  • Developer Website
  • Privacy Policy

    • More by Darius Cirjan

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