Comparison

NU vs K

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

NU

This app is a smart running tracker that records and analyzes your daily runs. It helps you build a running habit by visualizing workout data, tracking routes, and providing health indicators.

Highlights
  • Workout Dashboard
  • Real-time workout data
  • GPS-based route tracking
  • Workout History visualization
  • Daily, weekly, monthly statistics
  • Health indicators
Features
Read full description

[ NU:RUN – Your Personal Running Partner ] Run smarter, run happier. The most intuitive running data tracker to make running a habit. [ App Description ] 'NU:RUN' is a smart running application that records and analyzes your daily runs. Connect it with the R21 Running Watch to collect real-time workout data and perfect your own running routine. Take the first step toward a better you! Start your journey with 'NU:RUN'. [ Key Features ] - Workout Dashboard : Check key data at a glance, including running distance, workout time, and calories burned. - Workout History : Visualize workout-specific data with graphs, along with GPS-based route tracking. - Statistics : Provides various health indicators, such as calories and heart rate, on a daily, weekly, and monthly basis. [ App Permissions Guide ] * Required Permissions - Bluetooth (Device Connection) : Used for device connection and control, data transfer, firmware updates, watch face use, and supporting background connection. * Optional Permissions - Location (GPS) : Used for GPS location tracking to accurately measure the workout route and distance. It collects workout data in real-time even when the app is running in the background. - Camera (Photo Capture), Photos (Profile Image) : Used for capturing and registering photos for the user profile and activity sharing. - Notifications (App Notification Receipt) : Used to support notification services for calls, text messages, and various other applications.

About

K

This official running platform offers diverse activities for all runners, from casual joggers to marathoners. Discover city and park courses, track your runs with GPS, join challenges, connect with running crews, and find race and class information.

Highlights
  • Official running courses
  • GPS-based run tracking
  • Race and marathon information
  • Personal and group challenges
  • Running crew community
  • Running class information
Features
Read full description

대한육상연맹이 만든 공식 러닝 플랫폼 K-RUN 가볍게 러닝을 즐기는 사람부터 마라톤을 준비하는 사람까지, 모두가 참여할 수 있는 다양한 활동들이 준비되어 있어요. 모두 함께 즐기는 K RUN의 새로운 러닝 경험을 만나보세요. K-RUN 코스 달리기 - 도심·공원·강변등 다양한 지역의 러닝 코스 제공 - 코스 완주 시 러닝 뱃지 및 기록 인증서 제공 자유 달리기 - GPS 기반 러닝 경로·거리·페이스등 러닝 기록 저장 및 코스별 러닝 기록 기반 러닝 활동 관리 기능 챌린지 - 러닝 거리·코스 등 다양한 러닝 목표 기반 개인·단체 챌린지 참여 기능 크루 - 러너 간 소통과 교류를 위한 러닝 크루 커뮤니티 제공 및 크루 기반 러닝 활동 참여 기능 대회 - 전국 러닝 대회 및 마라톤 대회 정보 제공 및 대회 참가 신청 기능 클래스 - 대한육상연맹 전문 러닝 교육 프로그램 안내 및 신청 기능 주요 기능 • 대한육상연맹 공식 K-RUN 코스 정보 • GPS 기반 러닝 기록 측정 및 경로 저장 • 마라톤 및 러닝 대회 정보 확인 및 참가 신청 • 개인/단체 다양한 러닝 챌린지 • 크루 커뮤니티 및 러너 네트워크 ※ 본 플랫폼은 문화체육관광부와 국민체육진흥기금의 재정 후원을 받아 제작되었습니다.

Screenshots

NU4 screens
K4 screens

Verdict

The call

The clearest difference is update cadence: K at every 5 days against NU's fortnightly. On rating, ratings volume, ads and in-app purchases there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for NU against 5.0 for K. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

UpkeepUpdate frequency

NU ships an update fortnightly, K every 5 days. The most recent releases landed on October 21, 2026 and October 12, 2026 respectively.

Scorecard1 real difference · 9 level
NU versus K: the parameters behind the verdict, then further details
ParameterNUK
PriceFree — better—
Rating5.0 (1 ratings)5.0 (1 ratings)
Positive reviews28.6% of reviews—
Number of ratings11
Update frequencyFortnightlyEvery 5 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhoneiPhone, Apple Watch — better
Requires iOS16.0 — better17.0
Further details — not scored
Size111 MB64 MB
Age rating4+4+
DeveloperVC Inc.Korea Association of Athletics Federations

Customer experience

NU

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews7 reviews
Positive28.6%
Neutral42.9%
Negative28.6%

K

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

NU

No in-app purchases

None

K

No in-app purchases

Questions

Is NU free?
NU is free to download, with no in-app purchases.
Is K free?
Pricing for K is not currently listed on the App Store.
Which has better reviews, NU or K?
NU and K are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.
Do NU or K have ads?
Neither NU nor K shows ads.
Which is updated more often, NU or K?
NU ships an update fortnightly, and K every 5 days. Most recently, NU was updated on October 21, 2026 and K on October 12, 2026.

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