Comparison

FoodMarble 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

FoodMarble

Track your digestive health from home with a personal breath tester. Analyze how your gut responds to foods by measuring fermentation levels to identify potential intolerances and improve gut health.

Highlights
  • Personal digestive breath testing
  • AI-powered gut response analysis
  • Identify food intolerances
  • Measure gut fermentation levels
  • Holistic digestive tracking
  • At-home precision testing
Features
Read full description

Measure how well you digest different foods from the comfort of your home. We offer the most advanced personal digestive breath tester, AIRE 1 & AIRE 2, paired with this intuitive app to analyse how your gut responds to different foods. With a simple breath, we assess the fermentation levels in your gut, helping you identify potentially problematic foods. FoodMarble is tailored for those: - Struggling with digestive problems such as SIBO and IBS. - Eager to uncover foods causing intolerances. AIRE 2 will help you discover your food intolerances. - Seeking insights to enhance their daily digestive health. Why Choose FoodMarble: - Discover Food Intolerances: Through breath tests, we identify foods that might be causing intolerance in your system. - Gut Health Insights: Measure both hydrogen & methane gas levels in your breath and understand trends to make informed dietary choices. - Comprehensive Digestive Tracking: From logging your diet and symptoms to tracking your stress and sleep, FoodMarble provides a holistic view of your gut health. - At-Home Precision: Elevate your digestive insights with our top-tier portable breath testing device, designed for convenience and accuracy. What Makes Us Unique: - Clinical Validity: Trust accurate, clinically validated results. - Always With You: Our portable device ensures you can check your digestive health wherever you are. - Simplicity at Its Best: Just four steps - Log your food, take a breath test, record any symptoms, and then check your results in a few seconds. - Discover our Food Intolerance Kit to test your tolerance to 4 hard-to-digest food components (FODMAPs); lactose, fructose, sorbitol, and inulin. - Beyond Testing: Benefit from our expansive Food Library, curated low-FODMAP recipes and challenges. - Dedicated Support: Have questions or need assistance? Our responsive Customer Support is just a tap away within the app. Overcome digestive issues one breath at a time. Get started! www.foodmarble.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

FoodMarble4 screens
STACK DAYS Elite Training3 screens

Verdict

The call

The clearest difference is in-app purchases: FoodMarble at none against STACK DAYS Elite Training's 1. FoodMarble also leads on update cadence (weekly vs every 2 months). On price, ads, 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. STACK DAYS Elite Training sells 1 in-app purchase, starting at $249.00 per month. FoodMarble asks for nothing beyond the download.

UpkeepUpdate frequency

FoodMarble ships an update weekly, STACK DAYS Elite Training every 2 months. The most recent releases landed on October 17, 2026 and October 7, 2026 respectively.

Scorecard2 real differences · 8 level
FoodMarble versus STACK DAYS Elite Training: the parameters behind the verdict, then further details
ParameterFoodMarbleSTACK DAYS Elite Training
PriceFreeFree
Rating4.5 (1.1K ratings) — better—
Positive reviews54.1% of reviews—
Number of ratings1.1K — better—
Update frequencyWeekly — betterEvery 2 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS15.015.0
Further details — not scored
Size90 MB52 MB
Age rating4+17+
DeveloperFoodMarbleMobile Trainer, LLC

Bugs and requests

FoodMarble

Reported bugs

5 issues
  • App freezes and crashes frequently
  • Breath test device often fails to connect
  • Inconsistent or missing FODMAP information
  • Reminders and notifications not working as expected
  • Syncing issues between device and app

Requested features

6 requests
  • Expand food database with more options
  • Improve meal logging and food search experience
  • Add ability to edit or delete logged entries
  • Provide more detailed analysis and insights
  • Integrate with health tracking apps like MyFitnessPal
Show 1 more
  • Enhance reporting and data export capabilities

STACK DAYS Elite Training

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

FoodMarble

No in-app purchases

1 purchases

STACK DAYS Elite Training

Subscriptions1
  • STACK PRO$249.001 Month

Questions

Is FoodMarble free?
FoodMarble is free to download, with no in-app purchases.
Is STACK DAYS Elite Training free?
STACK DAYS Elite Training is free to download, with in-app purchases available.
Do FoodMarble or STACK DAYS Elite Training have ads?
Neither FoodMarble nor STACK DAYS Elite Training shows ads.
Which is updated more often, FoodMarble or STACK DAYS Elite Training?
FoodMarble ships an update weekly, and STACK DAYS Elite Training every 2 months. Most recently, FoodMarble was updated on October 17, 2026 and STACK DAYS Elite Training on October 7, 2026.

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