Coordinate Converter for iOS
CoordTool is a professional coordinate converter for iPhone and iPad. Convert and transform coordinates between 9 formats, including DD, DDM, DMS, UTM with WGS84 or NAD27 CONUS datum, MGRS, Plus Code, SWEREF99, RT90 and VOR navigation.
Try all features free for 7 days - no login required
Rated 4.8 out of 5 on the App Store
"Easy and fast." - App Store review
"A great coordinate converter with map pin support." - App Store review
Why CoordTool?
CoordTool is designed for professionals in aviation, geolocation and mapping who need a fast and accurate coordinate converter. Convert coordinates between GPS formats, UTM, MGRS, Plus Code, Swedish coordinate systems and VOR navigation directly on iOS.
- Precision
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Accurate conversion between all formats with decimal precision and correct datum transformation for Swedish systems.
- Offline-First
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Works offline after initial app launch. All conversions happen locally on your device.
- Privacy Focus
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All data stays on your device. No collection or sharing of your coordinates.
Use CoordTool when you need to convert coordinates quickly between common GPS formats and specialized coordinate systems. The app converts DD, DDM and DMS to UTM, MGRS, Plus Code, SWEREF99 and RT90 while keeping coordinate processing local on your device.
For UTM coordinates, CoordTool supports choosing WGS84 or NAD27 CONUS as the UTM datum when converting to and from other coordinate formats. This is useful when working with older North American maps, legacy UTM coordinates or field data that needs to be compared with modern WGS84 positions.
Powerful Features
All features included in 7-day trial - no login required
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Coordinate converter for 9 formats
- DD, DDM, DMS, UTM with WGS84 or NAD27 CONUS datum, MGRS, Plus Code, SWEREF99, RT90 and VOR navigation
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GPS Integration
- Real-time positioning with iOS Location Services and automatic conversion
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Swedish Coordinate Systems
- Full support for SWEREF99 and RT90 with correct datum transformation
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Quick Copy
- Copy individual coordinates or all formats at once with a single tap
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Interactive Map
- Map view with pin placement, zoom and distance calculations
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Validation & Precision
- Real-time input validation with high decimal precision
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VOR/NDB Navigation
- Global database of VOR and NDB stations, distance and bearing calculations, visual routing lines on map
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Plus Code with Google's Algorithm
- Implemented with Google's official algorithm for 11-character precision
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Helmert Transformation
- 7-parameter transformation between coordinate systems with ellipsoid parameters (GRS80, Bessel 1841)
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Customization & Themes
- Light/Dark mode with system preference detection and persistent user settings
See It In Action
Discover CoordTool's intuitive interface
Simple Pricing
Start free, upgrade when you need more
Trial Period
Test all features without limitations
7 days
Completely free - no login required
- All 9 coordinate formats
- VOR/NDB navigation
- GPS & interactive map
- SWEREF99 & RT90
- No limitations
- No login required
PRO
Unlock full access after trial period
$3.99
One-time purchase - lifetime access
- All features forever
- 9 coordinate formats
- VOR/NDB navigation
- SWEREF99 & RT90
- All future updates
- No subscription
Frequently Asked Questions
Quick answers about coordinate conversion and transformation
How can I convert coordinates on iPhone?
With CoordTool, you can convert coordinates on iPhone between DD, DDM, DMS, UTM, MGRS, SWEREF99, RT90 and Plus Code.
What coordinate formats does CoordTool support?
CoordTool supports DD, DDM, DMS, UTM, MGRS, Plus Code, SWEREF99, RT90 and VOR navigation formats.
Can I choose WGS84 or NAD27 CONUS for UTM coordinates?
Yes. CoordTool supports UTM coordinate conversion with datum selection for WGS84 or NAD27 CONUS when converting to and from other coordinate formats.
What is NAD27 CONUS used for in UTM coordinates?
NAD27 CONUS is an older North American datum used by some maps and legacy coordinate data. CoordTool lets you choose NAD27 CONUS as the UTM datum when converting to and from other coordinate formats.
Can I transform coordinates between SWEREF99 and RT90?
Yes. CoordTool supports accurate datum transformation between SWEREF99 and RT90.
Does coordinate conversion work offline?
Yes. The app works offline after first launch and all coordinate processing happens locally on your device.
Your Privacy First
CoordTool respects your privacy. All coordinate processing happens locally on your device. We don't collect, store, or share your coordinates or location data. The app works offline after initial launch, ensuring your data always remains private.
Ready to get started?
Download CoordTool today and experience professional coordinate conversion on iOS.