Two hikers on the Ta Xua ridge above a sea of clouds at sunrise

FREE TREKKING APP FOR VIETNAM'S MOUNTAINS

No signal, still on track.

Download maps on Wi-Fi. On the mountain, Lên records GPS on the phone, warns you when you leave the route and keeps SOS within reach. Hiking, trail running or riding a motorbike over the passes.

App Store · Coming soon

Free · Records with no signal · No ads while recording

3activities: hiking, trail running, moto

3recording modes to trade accuracy for battery

0ads while recording or in SOS

115SOS button calls emergency, always visible while recording

HOW IT WORKS

Three steps, then pocket the phone.

01
Download the map first
At home, on Wi-Fi: download the route and the map around it. No signal needed on the mountain.
02
Tap Start
Pick an activity and a recording mode. Three taps and you are recording.
03
Walk, the app does the rest
It keeps recording with the screen off and alerts you when you stray more than 35 m from the route.

SAFETY

Trust the footprints, but keep a paper map.

SOS

While recording, the SOS button is always on screen and calls 115. It is a support tool, not a replacement for rescue contact.

Sample routes are not surveyed tracks.
Trail condition reports come from users and always show their time.
Bring a power bank, a compass or paper map, and tell someone your route.
Lên never shows ads while recording or during SOS.

FAQ

Common questions.

Is Lên free?

Yes. There is no premium plan. Partner banners appear in the explore list, route details and trip summary, never while recording.

Does it record without signal?

Yes. Recording and positioning run on the phone. Download the map beforehand to see the base map offline.

How long does the battery last?

We do not publish a number until we have field tests. Three recording modes let you trade accuracy for battery.

Is there an iPhone version?

Not yet. App Store is coming soon, no date yet.

I am a porter or a tour business. How do I get in touch?

Use the contact form in the Porter & business section below.

A porter with a basket leading hikers on a mountain path

PORTER & BUSINESS

Guides and tour operators.

Porters, guides

Receive requests for the routes you lead.

Tour businesses

Group dashboard, assign guides, follow your group's GPS.

Download the map while you have signal.