Install Radius on Map (iOS)

Purchase Radius on Map Pro (iOS)

Purchase Radius on Map Pro (Mac)

Easily make a radius on a map and share a url showing the radius via email or text message that can be viewed with any browser.

Benefits of the paid version:
- Lock a radius to your current location.
- Landscape support and iPad split screen support.
- Share multiple radii in one url.
- Export your radii as polygons saved to a kml file to view in Google Earth™ or other mapping applications. You can attach the .kml file to an email or save to iCloud, Dropbox, etc.
- Import radii stored as polygons in a .kml or .kmz file. You can import a file from iCloud or Dropbox.
- Ability to specify which radii show on the map by selecting or deselecting them in the list view.
- Search for keywords in name and notes fields to find a specific radius.
- Custom message header and footers.
- Undo / redo functionality.
- No adverts

September 2020 update

January 2020 update

March 2018 update

December 2017 update

August 2017 update

July 2017 update

February 2017 update

January 2017 update

User Guide

   Map Page

   List Page

   Menu Popup and Settings

Frequently asked questions

How to enable crash reports

How to redeem a promo code


Other GPS related apps

Distance and Area Measure (iOS and macOS)

My GPS Coordinates (iOS)

GPS Odometer (iOS)

September 2020 update

January 2020 update

March 2018 update

If anything is obviously broken, similar to the bug that was introduced in December, please email me and let me know. Three people took the time to leave 1-star reviews, while only one person took the time to let me know about it. Note that developers are not notified when users leave reviews.

December 2017 update

Pro Version:

  • User is notified if an auto-fill email address is invalid.
  • Disabled auto correct for some text entry fields.

    August 2017 update

    Both Versions:

    Full Version:

    July 2017 update

    February 2017 update

    the following lists of model numbers are sorted
    Wi-Fi only iPad models without GPS:
    A1219, A1395, A1416, A1432, A1458, A1474, A1489, A1538, A1566, A1584, A1599, A1673

    Wi-Fi + cellular iPad models with a satellite GPS receiver:
    A1337, A1396, A1397, A1403, A1430, A1454, A1455, A1459, A1460, A1475, A1476, A1490, A1550, A1567, A1600, A1652, A1674, A1675

    January 2017 update

    User Guide

    Map Page

    How the map page may appear:

    To add a new radius, long press on the map and a popup dialog will appear. Optionally, enter some notes, change the name, etc.

    On most phones, the keyboard covers the bottom buttons, and you need to press the 'close keyboard' button so that you may press the Save or Cancel buttons.

    After pressing the Save button.
    The newly added radius becomes the 'selected' radius. The selected radius has the callout view above it displaying it's name, notes, etc. Only one radius may be selected at a time.

    Dragging a radius
    To drag a radius, it must be selected like in the image above. By pressing on the pin, the pin will float up so that you can see it under your finger. In this image, my finger is still on Florida, but note that the pin is now near Toronto.

    Move your finger to drag this pin and drop it wherever you want, for example, near Chicago.
    Since the description no longer makes any sense, I moved the pin back to Florida.


    There are two types of geocoding:
    - Forward geocoding converts an address into coordinates.
    - Reverse geocoding converts coordinates into addresses.

    Forward geocoding (Find point(s) for an address).

    Reverse geocoding (Find addresses near a point)

    1) In this example, the yellow dot near the center of the map is where we will click.
    Note the the '?' icon on the sidebar has been toggled and is shaded orange.

    2) After clicking on the point of interest, the map has zoomed out some to show some potential result markers.
    In this case, there are 3. They are labeled (0,1,2) and are ranked with the lowest number being the most probable result.
    A green map pin indicates where you clicked.

    3) By clicking the > arrow, you can advance to the next result.

    4) Clicking the > arrow again displays the last of the 3 results. Note that each result has a radius associated with it and is indicated with a yellow circle that becomes more pronounced when selected.

    To remove the results from the map, press the '?' button on the side bar.
    Press the '?' button one more time to toggle back to normal map mode. (so that clicking the map won't result in a reverse geocoding)

    List Page

    How the list page may appear:
    The radius tinted blue is the 'selected' radius. As on the map page, only one radius may be selected at a time.
    If no radius is selected, the bottom row of buttons will hide.
    Only radii that are checked will appear on the map.

    The top bar buttons from left to right.

    Save a .kml file to cloud storage. Note that only checked radii are included in the kml file and shown on the map. In this screenshot, Sydney will not be included in the kml file or shown on the map.

    Select a cloud service. Note that you must have iCloud, Dropbox, or whatever cloud storage provider setup and enabled on your device.

    Dropbox selected. The file name is radii_2017.01.04_19.02.14.kml. This corresponds to the date and time: January 04, 2017 7:02 pm. Note the the format YYYY.MM.DD_HH.MM.SS ensures that file be sorted by date and time with standard alphabetical sorting.

    Import a .kml or .kmz file from cloud storage. Choose a cloud provider as before and select select a kml file to import.

    Share the checked radii.
    'Include in body' means to list the human readable information and map link url in the body of the message. Note that there is a character limit as to how long a message body can be, so if you try to share something like 200 radii with 'include in body' checked, the app will most likely crash.
    'Attach file' will attach the same kml file as shown with the Dropbox example.

    Shows or hides 4 buttons. The first 3 check or uncheck cells in bulk. Note that only checked radii are shown on the map and exported when you share via email or save a file.

    The Search function filters items in the list that contain a substring. Both the name and the notes fields are searched:

    Entering 'O' returns all radii whose name or notes contain an 'O'
    Note that this is NOT case sensitive.

    'On' returns fewer results.

    Separate search keywords with a space.

    Each of the bottom bar buttons act on a single radius.
    The bottom bar buttons from left to right:

    Deletes the selected cell after showing a 'confirm delete' popup.

    Move the selected cell up or down in the list. Long pressing will move the cell to the top or bottom of the list.

    Opens the map page zoomed and centered on the the selected radius.

    Edit the the selected radius.

    Menu Popup and Settings

    This is not a tab like the 2 others. Rather it opens a popup menu.

    Email radius and Text message radius has a different function depending on which page you are on:
    List Page: The radius in the selected list cell (if any) is used.
    Map Page: The selected radius on the map (if any) is used.


    This defaults to your device's language preference. If you are a non-native English speaker and you are reading this, you may want to set to English since the translations are probably are not the best.

    Light or dark background.

    Coordinate Format
    Three Options:
  • Degrees: 51.500780
  • Degrees, Minutes, Seconds: 51° 30′ 2.81″ N
  • Degrees, Minutes: 51° 30.0468′ N

    Long distance units
    Three options:
  • kilometers
  • miles (1609.34 meters)
  • nautical miles (1852 meters)

    Small distance units
    Three options:
  • meters
  • feet
  • yards

    Default name for new radius
    Instead of the default Radius 1, Radius 2, Radius 3,
    you can replace 'Radius' with whatever you like. Each new default name will start numbering at 1...
    Airport 1, Airport 2...

    Email to auto fill
    pre-fill the TO: field when preparing an email. This saves a few clicks if you usually send to the same email address. For multiple addresses, separate them with a comma as usual.

    Phone number to auto fill
    pre-fill the TO: field when preparing a text message. This saves a few clicks if you usually send to the same number.

    Show current location on map
    That's the blinking blue dot on the map.

    Default radius
    Default radius for new Radii.

    Preserving pin color when exporting to other applications

    'Icon for kml export' setting.

    To preserve the pin color in other applications, a white icon may need to be used. For example, Google Earth™ forces the default yellow pushpin, so the color that you define in this app is applied to the ugly yellow pin. Blue becomes cyan, white becomes yellow, and orange shifts towards magenta. Changing the icon in Google Earth™ destroys the pin color entirely.

    Frequently asked questions

    Q Which Datum is used?
    A WGS 84


    Please include 'Radius on Map (Apple)' in the subject.
    If pertaining to the Mac version, please make that clear.