Know the road ahead.

Open it on the road and drive: there is no destination to enter. Speed cameras, mobile radars and police show on the map, and drive alerts warn you before you reach them. Seen something on the road? Report it in two taps and the drivers behind you get the warning. The map, reports and drive alerts are free.

The map, community reports and drive alerts are free, with no ads. Turn-by-turn navigation, with voice guidance, alerts along your route and place search on the map, is a subscription: monthly or yearly, bought in the app through the App Store or Google Play. RadarNav is on the App Store and Google Play. You can open the map without an account; one is needed to post, vote, read and write replies, add friends and subscribe.

Choose monthly or yearly on the navigation screen and pay through your App Store or Google Play account; RadarNav never sees your card. It renews automatically at the same price until you cancel it in your store account, at least 24 hours before the current period ends, and navigation stays unlocked until that period runs out. On a new phone, sign in with the same RadarNav account and tap Restore purchases.

Yes, with the navigation subscription. The search on the map finds places, and it also takes coordinates in decimal degrees (42.5081, 19.1346) or in degrees, minutes and seconds (42°30'29.2"N 19°08'04.6"E), as Google Maps and phones copy them, and shows that exact point. Browsing the map and its reports needs no subscription.

It depends on the type. Police, unmarked patrol car, mobile radar and drone reports expire two hours after they are published; accidents, hazards and traffic after one. Each “still there” vote from another driver keeps a report up for at least another hour from that vote, but never more than three hours after it was published. A speed camera report is the exception: a camera is a fixed installation, so it never expires and stays until drivers vote it out. Five different people in a row voting “not there” removes a report sooner, and a single “still there” resets that streak. Reports relayed from public drivers' groups follow the same lifetimes but are removed after two “not there” votes in a row.

When RadarNav knows your position, the pin has to be within 1 km of you, or 2 km for a speed camera, so reports come from people who are actually there. With location off you can place a pin by hand. There is also a cap on how many reports you can publish in ten minutes, an hour and a day. You can delete your own report until another driver confirms it.

A worldwide camera database, plus published government records in Montenegro. They never expire on a timer. A location from government records stays until we remove it; one from the camera database is retired when five drivers in a row say it is gone, and a single “still there” resets that count. A published location is not a promise that a camera is switched on.

RadarNav asks for it when you first open the map; say no and the map, the feed and reporting from a point you choose still work. Your device location history is never saved. While you share your location on a drive, your latest position is held on our servers and deleted within a minute. Publishing a report shares the point on the map, which starts at your position unless you move it.

Only while drive alerts or navigation are on and the app is open, and only while “Show me to nearby drivers and friends” is on: it is on by default, and you can turn it off when you first agree to the terms or any time in Account, Settings. Strangers see the RadarNav logo with no name and no speed, placed roughly and about a minute behind you. Its id keeps changing, it never appears near where your drive started or once you have been parked for a few minutes, and it is deleted within a minute of your last update. Friends you have accepted, and who have added you to the friends they watch, see your username or first name, photo, position and speed instead, live, even while you are parked. If you pick an emoji in the app, strangers see it in place of the logo, still with no name or speed. It is the same on every drive, so it can make you recognisable, and you can remove it any time.

Search a username or name in the Friends tab and send a request; the other person has to accept. Once you are friends, either of you can switch the other on in the Friends tab to show them on your map, pick a colour for them, and see their position, name and speed on the map while they drive with the app open. With notifications on, you hear about a new request and about an accepted one. A friend cannot see you while “Show me to nearby drivers and friends” is off, and ignoring or removing someone is never announced to them. Friends are free, like the map, reports and drive alerts.

Friend requests and accepted requests while you are signed in, now and then a short service notice from us, such as new cameras or an important fix, and drive reminders: a nudge before the times you usually drive, learned on your phone and never sent anywhere. Reminders come at most twice a day, never while you drive, and less often each time you ignore one; if you stay away for a while, one comes now and then for up to six months. Switch either kind off in Account, Settings, under Notifications: Friend notifications also covers the service notices, and Drive reminders covers the reminders. Notifications never carry ads.

Yes. On iPhone, drive alerts show what is ahead on a card on the Lock Screen and in the Dynamic Island, and navigation continues there too. Drive alerts run as a visible foreground service on Android, which needs no “allow all the time” permission.

Yes. Connect your iPhone to CarPlay or your Android phone to Android Auto and RadarNav shows its map, with reports, fixed cameras and friends, on the car's screen. Alerts appear there and speak through the car: Hide keeps one off the screen for the rest of the drive, and Mute silences that type of report, the same switch as in Settings. Add a report sends a report in one tap. On CarPlay the map also stays on the home screen next to your music, with shortcuts to drive alerts and reporting, and on the car map you can pinch to zoom and tap locate. With the navigation subscription you can also search for a destination from the car and follow turn-by-turn guidance there. The map, alerts and reporting in the car are free.

Yes, all of them or one type at a time. In Account, Settings, Voice alerts turns off the spoken warnings and Alert beep turns off the beep that quickens near cameras, radars and police. Alert sound picks which reports speak or beep, and the speaker button on an alert card mutes that type on the spot, until you turn it back on. A muted report still shows its card, and turn-by-turn directions keep speaking. Reports of the same kind a few dozen metres apart, like the cameras at a crossroad, count as one alert: it speaks and beeps once, and its card stays up until the last one is behind you.

Settings is in the Account tab, grouped into five sections. General has Appearance, Language and Units. Alerts has Alerts while driving, Voice alerts, Alert beep and Alert sound. Map has Show lean angle and Show speed while driving. Notifications has Drive reminders and Friend notifications. Friends and privacy has Show me to nearby drivers and friends and Findable by username.

The map is worldwide and community reports work anywhere. Fixed speed-camera locations come from a worldwide camera database, with published government records added in Montenegro.

Yes. Distances and speeds show in kilometres and km/h until you switch Units to Miles in Account, Settings, and the choice is remembered. Posted limits follow: a 50 km/h sign reads 31 mph, with the unit under the number so it is never mistaken for a km/h sign.