Comparison

Fast vs STACK DAYS Elite Training

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

Head to head
About

Fast

This app helps you track intermittent fasting routines, monitor progress, and analyze health data. It offers educational content, motivational challenges, and a journal to record your feelings. Connect with friends for support and motivation on your wellness journey.

Highlights
  • Fasting timer and tracker
  • Progress analytics and history
  • Educational 'Know It' section
  • Motivational challenges and trophies
  • Mood tracker and journal
  • Health app integration (steps)
  • Fasting buddy feature
Features
Read full description

Fast: Fasting Tracker & Timer helps you build consistent fasting habits with flexible fasting plans, body weight logging, water intake tracking, reminders, and detailed progress insights. Whether you're new to intermittent fasting or already following a routine, the app provides the tools to stay organized and work toward your personal health and wellness goals. Choose a fasting plan, customize your schedule, and track every fast in one place with an easy-to-use fasting tracker. FASTING PLANS Find a fasting schedule that works for your lifestyle. Choose from 12:12, 13:11, 14:10, 15:9, 16:8, 17:7, 18:6, 19:5, 20:4, 21:3, 22:2, 23:1, MWF, TTS, or create your own custom fasting plan. Whether you're starting intermittent fasting or maintaining an existing routine, you can choose a plan that suits your goals. FASTING TRACKER & TIMER Track active and completed fasts with an intuitive fasting tracker and timer. Review your fasting history and monitor your consistency over time. BODY WEIGHT & WATER TRACKING Log your body weight and monitor changes throughout your fasting routine. Track your daily water intake to stay hydrated and build healthier habits alongside your fasting schedule. SMART REMINDERS Stay on schedule with fasting reminders and water intake reminders. Customize notifications to help you start and end your fasting window on time while maintaining your daily hydration routine. ANALYTICS & HISTORY Review your fasting sessions, body weight, hydration logs, activity, and history with easy-to-understand analytics that help you monitor your progress and stay consistent. INFORMATIVE BLOGS Learn more about intermittent fasting through informative blogs covering healthy habits, wellness topics, and practical guidance to help you better understand your fasting routine. FASTING BUDDIES Stay motivated by fasting together. Invite friends, track each other's progress, and encourage one another throughout your fasting journey with the Buddy feature. ACTIVITY SUPPORT Sync your activity data to keep your fasting progress and daily activity organized in one place for a more complete overview of your routine. Whether you're following a 16:8 fasting schedule, exploring different intermittent fasting plans, or creating a custom fasting routine, Fast: Fasting Tracker & Timer gives you the tools to stay organized and build lasting healthy habits. DISCLAIMER This app is intended for informational and lifestyle purposes only and does not provide medical advice, diagnosis, or treatment. Consult a qualified healthcare professional before starting any fasting routine, especially if you have an existing medical condition, are pregnant, or have specific dietary requirements. PRIVACY POLICY https://maximaapps.com/fasting/privacy_policy.html TERMS OF USE https://maximaapps.com/fasting/terms-of-use.html GET IN TOUCH Have questions, feedback, or suggestions? We'd love to hear from you. Contact us through the app or email us at feedback@maximaapps.com.

About

STACK DAYS Elite Training

Features
Read full description

STACK DAYS Pro Training is built on a simple philosophy: dominate your moments one day at a time. Rooted in consistency and designed for the daily grind, this app is your partner in achieving strength, resilience, and longevity, whether you are an athlete or simply want to train like one. Powered by Coach Chris, a seasoned Southern California Strength and Conditioning Coach, STACK DAYS Pro Training offers a structured and adaptable approach to fitness. The program focuses on consistent daily actions tailored to your specific needs, helping you achieve your goals through simplicity, recovery, and intentional progress. Key Features: Personalized Training Plans: Workouts designed for your sport, fitness level, or lifestyle. Athletic Performance: Train like an athlete with programs that build strength, mobility, and endurance. Recovery and Longevity: Incorporate essential recovery techniques to support your body for the long haul. Daily Accountability: Stay on track with consistent programming and habit-building tools. In-App Communication: Engage with your coach for support, guidance, and motivation. STACK DAYS Pro Training is more than just an app; it is a movement focused on helping you stack wins every day. Whether you are preparing for game day, building a healthier lifestyle, or striving to reach your peak performance, this app is designed to simplify your journey and maximize your results. Join the STACK DAYS community and start dominating your moments today. * App access requires paid coaching plan Terms of use: https://kahunas.io/terms-conditions Privacy policy: https://kahunas.io/privacy

Screenshots

Fast4 screens
STACK DAYS Elite Training3 screens

Verdict

The call

The clearest difference is iOS requirement: STACK DAYS Elite Training at 15.0 against Fast's 18.6. On price, update cadence, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Fast sells 8 in-app purchases, starting at $4.99 per month and STACK DAYS Elite Training sells 1 in-app purchase, starting at $249.00 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 1, 2026 and September 20, 2026 respectively.

Scorecard1 real difference · 9 level
Fast versus STACK DAYS Elite Training: the parameters behind the verdict, then further details
ParameterFastSTACK DAYS Elite Training
PriceFreeFree
Rating4.7 (3.3K ratings) — better—
Positive reviews74.6% of reviews—
Number of ratings3.3K — better—
Update frequencyEvery 2 monthsEvery 2 months
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, Apple WatchiPhone, iPad, iPod
Requires iOS18.615.0 — better
Further details — not scored
Size116 MB52 MB
Age rating12+17+
DeveloperMaxima AppsMobile Trainer, LLC

Bugs and requests

Fast

Reported bugs

3 issues
  • Timer not accurately recording fasting times
  • Inability to update weight in app
  • Crashing when trying to view friend's status

Requested features

4 requests
  • Option to edit fasting start/end times
  • More detailed analytics and progress tracking
  • Improved syncing and data saving reliability
  • Expanded customization options

STACK DAYS Elite Training

Not enough reviews yet to summarise bugs or requests.

In-app purchases

8 purchases

Fast

Subscriptions6
  • Fast Premium Monthly$4.991 Month
  • Fasting Monthly$14.991 Month
  • Fasting Annually$19.991 Year
Show 3 more
  • Fasting Premium$27.993 Months
  • Fast Premium Yearly$29.991 Year
  • Fasting Premium Yearly$39.991 Year
One-time2
  • Fasting One Time Special Offer$19.99
  • Fasting Pro$49.99
1 purchases

STACK DAYS Elite Training

Subscriptions1
  • STACK PRO$249.001 Month

Questions

Is Fast free?
Fast is free to download, with in-app purchases available.
Is STACK DAYS Elite Training free?
STACK DAYS Elite Training is free to download, with in-app purchases available.
Do Fast or STACK DAYS Elite Training have ads?
Neither Fast nor STACK DAYS Elite Training shows ads.
Which is updated more often, Fast or STACK DAYS Elite Training?
Fast ships an update every 2 months, and STACK DAYS Elite Training every 2 months. Most recently, Fast was updated on October 1, 2026 and STACK DAYS Elite Training on September 20, 2026.

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