Sanlog
A flag for every summit

Reach your first summit and plant a flag

GPS follows every step, and a flag is planted the moment you reach the summit. You can also check in with a photo taken at the top. Record your hikes in a special way and stack up your ridgeline, one peak at a time.

Available on the App Store for iPhone · Android coming soon

Flag
One for every summit
Ridgeline
A whole year in one view
Echo
Live from the summit
Why Sanlog

Three ways to make every hike special

Climb, share, and keep. A hike that stays with you long after the descent.

Stand on the summit

GPS follows every step, and a flag is planted the moment you reach the summit. Elevation, slope, and time are recorded automatically, and you can also check in using the location of a summit photo.

Answer your fellow hikers

Chat with people climbing right now. Cheer on fellow hikers on the same mountain with Altitude chat.

Live on as an Echo

A line left at the summit and the day's journal entry pile up over time. Your year's peaks come together as a single picture on your ridgeline.

Around the World

Beyond Korea, to the world's mountains

Pick a country and its peak collection and famous-peak lists open up. The app is available in 한국어, English, Deutsch, and 日本語.

  • 🇰🇷 South Korea
    3,750+
    블랙야크 100대 명산 · 국내 권역
  • 🇯🇵 Japan
    2,100+
    日本百名山
  • 🇺🇸 United States
    3,000+
    Colorado 14ers · NH 48 · US Top 100 Peaks
  • 🇬🇧 United Kingdom
    1,700+
    UK Top 100 Peaks
  • 🇩🇪 Germany
    2,600+
    Germany Top 100 Peaks
  • 🇨🇭 Switzerland
    5,600+
    Swiss Peaks
  • 🇦🇹 Austria
    5,400+
    Peaks of the Alps

Peak counts are based on what the collection contains and keep growing. Some features (Black Yak 100 Famous Mountains, hiking gear price tracking, and Kakao login) are available only in Korea.

In the App

See Sanlog in action

From a peak collection of 3,750 mountains to Echoes from the summit, all in your hand.

Home screen — ridgeline visualization, flags, summit Echoes, and hike stats
Home
Your mountains at a glance
Flags, ridgeline, and summit Echoes on one screen
Peak collection screen
Collection
Peak collection
Fill it in one summit at a time
Hike start map screen — start button
Hike
Start with a single tap
Start GPS tracking near the mountain
Community screen — Namsan Echo posts
Community
Echoes from the summit
Talk with people who climbed the same mountain
Me profile screen — hike records and flags
Me
Your growing record
Flags and hike journals, piling up

← Swipe sideways to see more →

Summit Zone

Echoes from the summit

A single line that only those who reach the summit can leave. Today's mountains gather here.

P
Pinecone19
Mt. Bukhan · 2h ago

The wind is great today. Take your time getting up here.

♥ Cheers 12
M
Maple47
Mt. Gwanak · Yesterday

Finally made it to Yeonjudae on my third try. This view makes up for everything.

♥ Cheers 28
C
Cloud68
Namsan · 5h ago

Another summit check-in today. One peak on the way home from work.

♥ Cheers 7

Plant your first flag today

Sanlog is now on the App Store. See you at the summit.

Download on the App Store FAQ

Available on the App Store for iPhone · Android coming soon