Comparison

Running Slimkit vs IronFast

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

Head to head
About

Running Slimkit

This app offers a comprehensive approach to weight loss through running and nutrition. It provides personalized training plans with interval workouts and balanced meal plans, along with features to track progress and stay motivated.

Highlights
  • Weight loss running plans
  • Interval training workouts
  • Healthy meal plans
  • Water intake tracker
  • Audio coaching and feedback
  • Workout progress tracking
  • Integration with health apps
Features
Read full description

SLIM DOWN IN 4 WEEKS. The first running app on the App Store designed specially for weight loss. Make your running serve your goals! COMPLEX APPROACH The key to effective weight loss lies in the right combination of workouts and nutrition. With our app you’ll get a plan of running workouts and meal plans to achieve your weight loss goals. TRAINING PLANS Burn maximum of calories with interval plans, made of running, walking and sprint intervals. - Get a plan up to your goals and your fitness level. - Have workouts only 3 times per week and get fit fast. - Choose from the variety of plans to lose weight, maintain results, keep fit and active. - Free run feature allows to run and keep tracking your results without sticking to any training plan. NUTRITION Follow a healthy, nutritionally-balanced meal plan and lose weight faster. - Yummy recipes with step-by-step instructions. - Learn how to make healthy and tasty choices for breakfast, lunch, dinner and between them. - Use the water tracker to stay hydrated. CONVENIENT EXPERIENCE All you need is to do your best during a workout, the app will do the rest. - Choose your personal trainer, from sweet and encouraging to tough and military-style. - Enjoy detailed audio instructions for every training. - Get voice encouragements and stats updates during your runs. - Adjust the amount of audio feedback. - Keep record of every workout and track your overall progress. - Mark your mood, weather and take notes about your workout. - Take pictures during your runs right from the app. - Synchronize with Apple Health, Fitbit, Runkeeper and MapMyRun. USEFUL TIPS Read hundreds of useful healthy eating, workout and clothing tips, which are regularly updated. INFO ABOUT USING THE APP AND REGARDING THE SUBSCRIPTION TERMS OF USE AND SUBSCRIPTION DETAILS The upgrade to Premium provides access to the variety of training plans and audio coaches, meal plans, running playlists and turns the advertisements off. Your monthly subscription is $9.99 per month, a half-year subscription is $41.99 per 6 months, while the lifetime subscription is $59.99 (price may vary by location). - Payment will be charged to iTunes Account at confirmation of purchase - Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period - Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal - Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase - Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable. Featured in Washington Post, AppleInsider and Huffington Post. Featured by Apple in “Best Apps for Runners,” “Get in Shape,” “Hit the Ground Running in 2016.” Privacy Policy: https://verv.com/running-ios-privacy-policy/ Terms of Use: https://verv.com/running-ios-terms/ Note: Continued use of GPS running in the background can dramatically decrease battery life. This app is developed for informational purposes only. You must always consult your physician or doctor before starting any fitness program. Follow us! Facebook: https://facebook.com/Verv/ Twitter: @verv_inc Instagram: @verv

About

IronFast

Features
Read full description

**IronFast — the safest, most honest fasting app at the best price.** Track your intermittent fasting with a beautiful timer, real-time fasting phases, and safety features that actually care about your health. **WHY IRONFAST?** Most fasting apps skip the important stuff — safety screenings, medical disclaimers, honest science. We built IronFast to do it right. Every health claim includes a disclaimer. Every extended fast includes safety check-ins. And we block users who shouldn't be fasting (pregnant, eating disorders, Type 1 diabetes) instead of taking their money anyway. **FREE FEATURES:** - Beautiful circular fasting timer - Popular plans: 12:12, 14:10, 16:8, 18:6 - Real-time fasting phases (Fed → Fat Burning → Ketosis) - Phase descriptions with honest scientific disclaimers - Push notifications (start, goal reached, phase transitions) - 7-day fasting history - Streak tracking - Daily hydration tracker - Safety symptom checker during fasts - Medical disclaimer, age verification, health screening **IRONFAST PRO ($3.99/month or $24.99/year):** - All fasting plans including 20:4 Warrior, 36-hour Monk, 5:2, and custom - Detailed stats and weight tracking - 72-hour automatic safety cap - Refeeding guidance after extended fasts - NEDA helpline access for those who need support **HONEST SCIENCE:** Every fasting phase description and health claim in IronFast is labeled "Based on available research" because that's the truth. We don't oversell. We don't make miracle claims. We give you the facts and let you decide. **YOUR DATA, YOUR DEVICE:** All data stays on your device. No accounts. No cloud sync. No tracking. No ads. Ever. **SUBSCRIPTION INFORMATION:** IronFast Pro is available as an auto-renewable subscription. - Monthly: $3.99/month - Annual: $24.99/year Payment will be charged to your Apple ID account at confirmation of purchase. Subscription automatically renews unless canceled at least 24 hours before the end of the current period. You can manage and cancel your subscriptions in your App Store account settings. Privacy Policy: https://sjpapps.com/apps/ironfast/privacy.html Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Questions? support@ironfast.app

Screenshots

Running Slimkit4 screens
IronFast4 screens

Verdict

The call

The clearest difference is ads: IronFast at none against Running Slimkit's shown. IronFast also leads on update cadence (daily vs fortnightly). On price, in-app purchases, device support and iOS requirement 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Running Slimkit sells 10 in-app purchases, starting at $8.99 per month and IronFast sells 4 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Running Slimkit ships an update fortnightly, IronFast daily. The most recent releases landed on November 7, 2026 and October 31, 2026 respectively.

Scorecard2 real differences · 8 level
Running Slimkit versus IronFast: the parameters behind the verdict, then further details
ParameterRunning SlimkitIronFast
PriceFreeFree
Rating4.6 (87K ratings) — better—
Positive reviews67.1% of reviews—
Number of ratings87K — better—
Update frequencyFortnightlyDaily — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFreemium—
DevicesiPhone, iPod, Apple WatchiPhone, iPad, iPod, Apple Watch — better
Requires iOS14.013.0 — better
Further details — not scored
Size138 MB31 MB
Age rating4+17+
DeveloperMONTIBUS LTDSJP Custom Solutions LLC

Bugs and requests

Running Slimkit

Reported bugs

4 issues
  • App crashes or freezes during workouts
  • Workout data sometimes gets deleted or lost
  • Inaccurate calorie and distance tracking
  • Subscription issues (e.g., unexpected charges, unable to cancel)

Requested features

6 requests
  • Allow users to customize their own workouts
  • Provide more meal plan options (e.g., vegetarian, vegan)
  • Improve Apple Watch integration and functionality
  • Add option to switch between miles and kilometers
  • Improve indoor run tracking
Show 1 more
  • Provide more detailed workout history and progress tracking

IronFast

Not enough reviews yet to summarise bugs or requests.

In-app purchases

10 purchases

Running Slimkit

Subscriptions10
  • Premium Membership7 Days trial$8.991 Month
  • Premium Membership7 Days trial$9.991 Month
  • Premium membership (1 month)7 Days trial$9.991 Month
Show 7 more
  • Premium membership (1 month)$9.991 Month
  • Premium membership: training & meal plans, music7 Days trial$11.991 Month
  • Premium membership (1 month)$14.991 Month
  • Premium membership (1 year)$39.991 Year
  • Premium Membership$39.991 Year
  • Premium membership (6 months)7 Days trial$41.996 Months
  • Premium membership (1 year)7 Days trial$59.991 Year
4 purchases

IronFast

Subscriptions4
  • IronFast Pro Monthly$3.991 Month
  • IronFast Pro$3.991 Month
  • IronFast Pro Annual$24.991 Year
Show 1 more
  • IronFast Pro7 Days trial$24.991 Year

Questions

Is Running Slimkit free?
Running Slimkit is free to download, with in-app purchases available.
Is IronFast free?
IronFast is free to download, with in-app purchases available.
Do Running Slimkit or IronFast have ads?
Running Slimkit shows ads; IronFast does not.
Which is updated more often, Running Slimkit or IronFast?
Running Slimkit ships an update fortnightly, and IronFast daily. Most recently, Running Slimkit was updated on November 7, 2026 and IronFast on October 31, 2026.

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