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Best 21K Half Marathon Run Coach Apps

183+ iOS apps curated and reviewed

4.8 avg rating
20 free apps
Updated May 2026

Whether you're new to 21k half marathon run coach or looking for an upgrade, our curated collection of 183+ iOS apps has something for everyone. Each app is reviewed and rated by real users, helping you make an informed decision.

Top Picks for 21K Half Marathon Run Coach

Half Marathon Trainer: 21K Run#1

Half Marathon Trainer: 21K Run by FITNESS22 LTD

Half marathon training 13.1 mi
Editor's Choice
💪 Health & Fitness
4.8😐(1.6K ratings)
FreeIn-App Purchases
Half Marathon Trainer: 21K Run screenshot 1
Half Marathon Trainer: 21K Run screenshot 2
Half Marathon Trainer: 21K Run screenshot 3
Half Marathon Trainer: 21K Run screenshot 4
Half Marathon Trainer: 21K Run screenshot 5

This app provides a structured 12-week training program designed to help users progress from a 10K fitness level to completing a half marathon (21K). It features an audio coach for guidance, motivational elements, and progress tracking with achievements.

What We Love

  • 🚀 Easy to follow training plan
  • 👍 Effective for building up to half marathon
  • 👍 Variety of workouts (running, intervals, strength)
  • 👍 Motivating and keeps user on track

Room to Improve

  • 🐛 Inconsistent audio prompts and notifications
  • 🐛 Frequent issues with saving/tracking runs
  • 🐛 Glitches and crashes
Half Marathon 13.1 Trainer#2

Half Marathon 13.1 Trainer by Zen Labs

21K Run Walk Training by C25K®
Strong Contender
💪 Health & Fitness
4.7😊(5.5K ratings)
FreeAdsIn-App Purchases
Half Marathon 13.1 Trainer screenshot 1
Half Marathon 13.1 Trainer screenshot 2
Half Marathon 13.1 Trainer screenshot 3
Half Marathon 13.1 Trainer screenshot 4
Half Marathon 13.1 Trainer screenshot 5
Half Marathon 13.1 Trainer screenshot 6

This app guides beginners through a 14-week program to train for a half marathon using a run-walk method. It offers audio coaching, progress tracking, and community support to help users complete their first 13.1-mile race.

What We Love

  • 👍 Easy to use
  • 👍 Helpful for beginners
  • 👍 Great for training and motivation
  • 👍 Integrates well with Apple Watch and Fitness

Room to Improve

  • 🐛 Occasional syncing and tracking issues
  • 🔋 Drains battery life
  • 💰 Subscription model change frustrates some users
Runna: Running Plans & Coach#3

Runna: Running Plans & Coach by Strava Inc.

5k to Marathon Training
Worth Considering
💪 Health & Fitness
4.9😊(31K ratings)
FreeAdsIn-App Purchases
#9in Health & Fitness
Runna: Running Plans & Coach screenshot 1
Runna: Running Plans & Coach screenshot 2
Runna: Running Plans & Coach screenshot 3
Runna: Running Plans & Coach screenshot 4
Runna: Running Plans & Coach screenshot 5
Runna: Running Plans & Coach screenshot 6

This app provides tailored running training plans designed by world-class coaches for all levels, from beginners to marathoners. It offers personalized programs, run tracking, strength training, and a supportive community.

What We Love

  • 🚀 Excellent training plans
  • 👍 Personalized and customizable
  • 👍 Variety of workouts
  • 👍 Seamless integration with fitness trackers

Room to Improve

  • 🐛 Occasional syncing issues with Apple Watch
  • 🐛 Inaccurate pace tracking on treadmill
  • 🔋 Expensive subscription cost

More 21K Half Marathon Run Coach apps to explore

4
Nike Run Club: Cardio Exercise
Nike Run Club: Cardio Exercise
Nike Run Club: Cardio Exercise
Workout App & Distance Tracker
Free

This app offers guided runs, training plans, and community challenges to help users start, continue, and enjoy running. It tracks speed, distance, and GPS routes, providing motivation and expert guidance for various fitness levels and goals.

Guided Runs with audio coachingPersonalized Training PlansGPS tracking for speed, distance, and route
💪 Health & Fitness
(413K)
free with in-app purchases
5
21K Half Marathon Run Coach
21K Half Marathon Run Coach
21K Half Marathon Run Coach
#1 Marathon Trainer & Tracker
Free

This app provides a personalized training plan to help you achieve your half marathon goals. It tracks your runs, offers diet plans, and motivates you with progress tracking and social sharing features. Suitable for all fitness levels, it guides you from beginner to finisher.

Customized running plansGPS distance and speed trackingStep-by-step voice guidance
💪 Health & Fitness
(3)
free with in-app purchases
6
10K Runner, Couch to 10K Run
10K Runner, Couch to 10K Run
10K Runner, Couch to 10K Run
10K Trainer: 0 to 5K to 10K
Free

This app guides beginners and 5K runners from zero to 10K in 14 weeks using alternating walk/run intervals. It features a human coach voice, music integration, and GPS tracking. Achieve your running goals with this effective, ad-free program.

Walk/run interval trainingGradually increasing run segmentsHuman coach voice guidance
💪 Health & Fitness
(38K)
subscription
7
Start 2 Run
Start 2 Run
Start 2 Run
The running app for everyone.
Free

Achieve your running goals with personalized training plans and virtual coaching. Track your progress with heart rate monitoring and detailed analysis reports. Enjoy an intuitive interface and Apple Watch integration.

Customized training plansPersonalized coachingHeart rate monitoring
💪 Health & Fitness
(30)
free with in-app purchases
8
Half Marathon- 21K Run App
Half Marathon- 21K Run App
Half Marathon- 21K Run App
Couch to half marathon- 21K
Free

Train for your first 21K run with a comprehensive 12-week program. This app offers audio coaching, interval planning, and motivational tips to build strength and endurance. Track your progress, earn badges, and share achievements with friends.

12-week running programAudio coach guidanceRun/walk strategy
💪 Health & Fitness
(254)
free with in-app purchases
9
RunMotion - Running Coach
RunMotion - Running Coach
RunMotion - Running Coach
Adaptive Training Plan & Tips
Free

Get a personalized, adaptive training plan to achieve your running goals, whether you're a beginner or advanced. This app acts as your pocket running coach, offering varied sessions, motivation, and tips for any distance or surface. It syncs with GPS watches and other apps to track your progress.

Adaptive training plansPersonalized to ability and scheduleTrain for any distance (5k to ultras)
💪 Health & Fitness
(71)
freemium
10
Map My Run GPS Running Tracker
Map My Run GPS Running Tracker
Map My Run GPS Running Tracker
5K 10K, Half Marathon Training
Free

Track your runs with GPS, get personalized training plans, and real-time stats. This app offers coaching tips, community motivation, and supports over 600 activities. Improve your performance indoors or outdoors.

GPS tracking for distance, pace, and elevationCustomizable training plans for various distancesReal-time audio feedback during runs
💪 Health & Fitness
(744K)
free with in-app purchases
11
Strava to GPX
Strava to GPX
Strava to GPX
GPS file for Relive and route
Free

Easily convert your Strava activities into GPX files. Transfer detailed data like distance, elevation, and speed for analysis or import into other fitness apps. Take control of your activity data with this quick and hassle-free conversion tool.

Convert Strava activities to GPXTransfer distance, elevation, speedInclude heart rate data
⚽ Sports
(9)
free
12
Marathon 26.2 Trainer by C25K®
Marathon 26.2 Trainer by C25K®
Marathon 26.2 Trainer by C25K®
42K Run Walk Training
Free

This app offers a 20-week training program designed for beginners aiming to complete a marathon. It utilizes a run-walk method to reduce impact and injury risk, guided by an audio coach. Features include run mapping, health app integration, and community forums.

20-week run-walk marathon training programAudio coach and alertsMap your run
💪 Health & Fitness
(1.6K)
free with in-app purchases
13
Run With Hal
Run With Hal
Run With Hal
Coach-Led Run Plans
Free

This app provides personalized, adaptive training plans for various running distances, from 5K to 50K. It's guided by legendary coach Hal Higdon and adjusts to your progress, schedule, and goals. Features include GPS tracking, daily tips, and progress summaries to help you achieve your running ambitions.

Adaptive training plansPlans for 5K to 50K racesDaily motivation from Hal Higdon
💪 Health & Fitness
(2.8K)
free with in-app purchases
14
Coopah: The Run Coaching App
Coopah: The Run Coaching App
Coopah: The Run Coaching App
5K, 10K, Half & Marathon Coach
Free

This app provides personalized running coaching with adaptive plans that adjust to your fitness and life. It offers daily direction, race readiness scores, and 24/7 expert support to help you achieve your running goals and prevent injuries.

Adaptive coaching plansRace Day Confidence Score24/7 Expert Coaching (AI & human)
💪 Health & Fitness
(90)
free with in-app purchases
15
Run Half Marathon
Run Half Marathon
Run Half Marathon
5K, 10K & Marathon Runner Plan
Free

This app provides a structured 18-week training plan to help beginners run a half marathon. It guides users through alternating walking and running intervals, tracks progress with GPS, and offers motivational features. Users can log and share their runs, and receive audio cues for when to run or walk.

18-week zero to half marathon training scheduleAlternating walk/run intervals with audio cuesGPS tracking for running routes
💪 Health & Fitness
(117)
free with in-app purchases
16
C25K® 5K Running Coach & Map
C25K® 5K Running Coach & Map
C25K® 5K Running Coach & Map
Run Training - Couch to Runner
Free

This app guides beginners from being inactive to running a 5K in 8 weeks. It uses a structured plan with audio coaching and alerts, gradually increasing running intervals. Users can map their runs and join a supportive community.

Official Couch to 5K program8-week training planAudio coach and alerts
💪 Health & Fitness
(170K)
free with in-app purchases
17
ASICS Runkeeper—Run Tracker
ASICS Runkeeper—Run Tracker
ASICS Runkeeper—Run Tracker
Running App and Training Plans
Free

Track your runs, set personalized goals, and follow guided workouts to improve your fitness. This app offers GPS tracking for various activities, progress monitoring, and motivational features to help you achieve your running ambitions.

GPS activity trackingPersonalized training plansAudio-guided workouts
💪 Health & Fitness
(374K)
free with in-app purchases
18
5K Runner: couch potato to 5K
5K Runner: couch potato to 5K
5K Runner: couch potato to 5K
Couch potato to 5K: Run 5K
Free

This app guides users from being inactive to running a 5K in 8 weeks with a structured, 30-minute daily program. It features a human coach voice, music integration, and GPS tracking to help you achieve your fitness goals.

8-week structured training planAlternating walk/run intervalsHuman coach voice guidance
💪 Health & Fitness
(117K)
subscription
19
Running Trainer: Tracker&Coach
Running Trainer: Tracker&Coach
Running Trainer: Tracker&Coach
Run Coach: 5K & 10K Runner
Free

This app provides accurate running tracking, including pace, distance, calories, and heart rate. It offers voice feedback, music integration, and a history of your running activities to help you improve.

Accurate distance and time trackingPace and calorie trackingGPS mapping and route tracking
💪 Health & Fitness
(112K)
subscription
20
adidas Running: Run tracker
adidas Running: Run tracker
adidas Running: Run tracker
From Walk to Marathon training
Free

Track your runs and fitness activities with personalized training plans for all levels. Connect with a global community, join challenges, and monitor your progress with detailed stats and expert guidance.

Activity tracking for running, walking, cycling, and morePersonalized training plans for various distancesSyncs with Health Connect and popular devices
💪 Health & Fitness
(18K)
ad-supported