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84
BU Score
Excellent

C25K® 5K Running Coach & Map

4.8 ✍️ Editor
✍️ BU Analytics Review

C25K® 5K Running Coach & Map is an iOS app from Zen Labs in the Health & Fitness category, currently rated 4.8★ across 168,917 ratings. Initial signal reads as largely positive sentiment, users highlighting consistency and feature depth.

Our BU Score puts it at 84Excellent (strong product-market fit). For a Health & Fitness app, that means strong product-market fit.

Track changes month-over-month in the Performance section below — live snapshot history and revenue forecast included.

creator

📊 Performance Tracking LIVE

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Reviews
Forecast Revenue / mo
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💰 Forecast Revenue / mo

MODEL
Revenue forecast computed from BU's 234 trigger model on each snapshot. Calibrated against ground-truth from 58 verified-revenue apps.
🔬Forecast Breakdown — Why This Estimate?Top 13 of 13 triggers
Our ML model uses 200+ signals from public data. These are the most influential for this app:
High install base (168,917 ratings)METRIC
+$12,000
subscriptionREVIEW
+$2,500
Excellent rating (4.8★)METRIC
+$2,200
bugsREVIEW
−$1,800
5 starREVIEW
+$1,800
excellent appREVIEW
+$1,500
Mature app (14y old)METRIC
+$1,500
highly recommendREVIEW
+$1,400
slowREVIEW
−$1,200
free trialREVIEW
+$1,200
too expensiveREVIEW
−$1,000
Ad-supported / freemiumMETRIC
+$600
Single-language (English only)METRIC
−$400
METRIC = structural app data · REVIEW = mined from user reviews · ✓ VERIFIED = Stripe-verified anchor (TrustMRR)

📈 Reviews Growth

LIVE
Cumulative review count from first BU snapshot. Each point = a tracked update.
💚Sentiment Over Time↑ green = positive · ↓ red = negative
Jun 25
Jul 25
Aug 25
Sep 25
Oct 25
Nov 25
Dec 25
Jan 26
Feb 26
Mar 26
Apr 26
May 26

⭐ Rating Trend

LIVE
Average rating evolution. Updates with each new review batch.

🗓️ Snapshot Timeline

HISTORY
Each bar shows a tracked update and the metric delta from the previous snapshot.
App Specs
🔐 Own this app? Claim & verify MRR →
💾 315 MB🔞 4+📱 iOS 14.0+🔖 v5.3.31🔄 updated 1mo ago🌐 EN📂 Health & Fitness💰 Paid🚀 Launched 2011 (14y old)

📝 About this app

■ The OFFICIAL C25K® (Couch to 5K) program with millions of success stories!
■ Official partners and featured on FITBIT and SAMSUNG smart watches!
■ Featured on The New York Times, Los Angeles Times, The Washington Post, The Guardian, The Huffington Post, Men's Fitness, Forbes, Mashable, Glamour Magazine, Popsugar Fitness, CBS News, NBC News, Macworld, Cosmopolitan, The Verge, Lifehacker, WebMD and many more!

"C25K is easy to use, as you would hope for a beginner app." - New York Times

"Daily programs that alternate between short bursts of walking and running until you're ready to go the distance." - Forbes

"One of the highest-rated health and fitness apps... A modest, realistic workout schedule." - Men's Fitness

Our community is our priority. Questions? Comments? Suggestions? See why our community has made us the #1 5K training app. contactus@zenlabsfitness.com

≈ Real-Life Inspirational Transformations ≈
◎ Over 185,000 Likes and 1500 Success Photos at facebook.com/c25kfree
◎ Our community inspires one another (and inspires us!) everyday. Hear their amazing stories.

"In this last year I have lost 97 lbs, gotten off insulin and 9 other medications, completed the C25K running app and started the 10k app. Life is a blessing." - Diana

“I went from a size 16 to a size 7. I tell anyone I can about the app. because it was nothing short of a life changer.” - Amber

"I'm now down 50 pounds from when I began C25K in August. I've gone through the program 3 times increasing my speed by a half MPH each time." - Claire

C25K® is the easiest program to get beginners from couch potatoes to 5K distance runners in 8 weeks.

The proven C25K program was designed for inexperienced runners who are just beginning. The plan's structure prevents new runners from giving up and challenges them to continue moving forward. C25K works because it starts with a mix of running and walking, gradually building up strength and stamina.

≈ Less is More ≈
◎ First week free! Easy to learn. Just press start!
◎ Ideal for first-time runners
◎ 30 minutes a day, 3 days a week, 8 weeks total. Millions have finished their first 5K. You will too!

≈ Features ≈
◉ Convenient audio coach and alerts
◉ Map your run at the end of your workout!
◉ Light and dark modes
◉ Health app integration
◉ Free iPad integration for indoor treadmills
◉ Integrated with Facebook, Twitter, and Instagram
◉ Access to our forums with thousands of veterans and newcomers starting the app. Join the community and meet other runners!

≈ NEW Zen Unlimited Pass - Try it for free! ≈
◉ Award winning music curated from top DJ's!
◉ Scientifically proven to increase motivation by 35%
◉ Unlimited access to all pro features across ALL Zen Labs Fitness apps
◉ Unlock calories, distance, Apple watch integration, and more
◉ One subscription unlocks all our apps!

≈ Connect ≈
Facebook: @C25Kfree
Twitter: @C25Kfree
Instagram: @officialc25k
Hashtag: #C25K

Zen Labs is a proud supporter of the National Breast Cancer Coalition. breastcancerdeadline2020.org

Subscription pricing and terms:

The subscription will automatically renew unless turned off in your iTunes Account Settings at least 24 hours before current period ends. You can go to your iTunes Account settings to manage your subscription and turn off auto-renew. Your iTunes Account will be charged when the purchase is confirmed. If you subscribe before your free trial ends, the rest of your free trial period will be forfeited as soon as your purchase is confirmed.

Privacy Policy & Terms of Use:
https://www.zenlabsfitness.com/privacy-policy/

Apple Standard Terms of Use (EULA):
https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Legal Disclaimer

This app and any information given by it or by Zen Labs LLC are for educational purposes only. You should always consult your healthcare provider before beginning any fitness program.

C25K® is a registered trademark of Zen Labs LLC

🆕 What's New · v5.3.31

◎ New Apple Watch App
◎ Minor bug fixes and optimization

Our community is our number one priority. We answer each and every email. Most of our updates have been suggestions from our community. Questions? Comments? Suggestions? See why our community has made us the #1 5K training app. contactus@zenlabsfitness.com

Profile & Insights

Everything we know — and don't — about this app and its company.

Identification

App name
C25K® 5K Running Coach & Map
Developer
Zen Labs
Bundle ID
com.zenlabs.c25kfree
App Store URL
Open in App Store
Category
Health & Fitness
Content rating
4+
Languages
EN

Company

Website
Not found
Tagline
welcome
Description
Not found
Founded
Not found
HQ / Address
Not found
Employees
Not found
Logo
Not found

Revenue

Verified revenue / mo
Not found
AI revenue estimate / mo
$100.0KAI medium
AI annual estimate
$1.2M/yr
ML model estimate / mo
$25.4K/mo
Top-grossing rank
Outside top 100 in US Health & Fitness
All-time revenue
Not found
Pricing
Not found

Founder

Name
Not found
X / Twitter
https://twitter.com/c25kfree
LinkedIn
Not found
GitHub
Not found
X followers
Not found
Public statements
Not found

Funding

Total raised
Not found
Last round
Not found
Investors
Not found
Crunchbase
Not found
AngelList
Not found

Press & Links

Articles found
Not found
Listed on
Not found
Blog
https://www.zenlabsfitness.com/blog/
Press / News
Not found

Contacts & Socials

Socials
facebook · instagram · twitter
Email
contactus@zenlabsfitness.com
Phone
Not found
Contact page
Not found
About page
Not found
AI Revenue EstimateCONFIDENCE: MEDIUM
The iOS app "C25K® 5K Running Coach & Map" by Zen Labs is estimated to generate $100,000 in monthly revenue, leading to an annual estimate of $1,200,000. This estimate is based on a public app showcase, which also indicates approximately 25,000 monthly installs for the app.
Sources mentioned: ScreensDesign, App Store, Reddit, Zen Labs Fitness
Recent App Store Reviews49 latest · avg 4.39★ · 75.5% 5★ · 10.2% 1★
5★
37 (76%)
4★
4 (8%)
3★
3 (6%)
2★
0 (0%)
1★
5 (10%)
+109 ratings/week
Praise: love ×13 great ×8 perfect ×4 awesome ×4 best ×4Complaints: overpriced ×1
Top positive
★★★★★ 10K
I am in my 9th week! I LOVE this app!!!!!!…
★★★★★ Review!
I hope this app will help me get back to running for cross country! High Hopes!!…
Top negative
★☆☆☆☆ Not free
Found and app that’s actually free for the full program. This was only free for like a week.…
★☆☆☆☆ purchased the bundle with unlimited pass a few years ago, no longer honors it
i purchased the bundle with unlimited that contains all four apps. i redownloaded them to get back to running and tried to restore my purchases and the apps no longer acknowledge my purchase. they claim i have no purchases to restore.…
📈Ratings growth168,917 ratings+42% lifetimeShow 3-year history estimate ▾May 2023Jan 2026May 2026
Tracked (44 weeks) Pre-tracking estimate (34 weeks) · model-based, ±5% noise · anchored to release date and current value
🌍Geographic ReachNot ranked
This app is currently outside the top 100 grossing in all 9 countries we monitor (US, UK, DE, FR, JP, CA, AU, BR, IN). Niche or new apps often launch this way — popularity rankings appear once daily revenue clears the regional threshold.
Profile is built from iTunes Lookup + developer site scrape + ML revenue model. Empty fields show "Not found" — additional sources (Crunchbase, X, IndieHackers, Acquire.com) coming.
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