# FoodMarble vs STACK DAYS Elite Training

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.

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.

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.

## The numbers

| Metric | FoodMarble | STACK DAYS Elite Training |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (1.1K ratings)](https://appshunter.io/ios/app/foodmarble/id1257021857/reviews)** | — |
| Number of ratings | **1.1K** | — |
| Positive reviews | 54.1% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 2 months |
| Monetization | Free with in-app purchases | — |
| Size | 90 MB | 52 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [FoodMarble](https://appshunter.io/developer/1257021856) | [Mobile Trainer, LLC](https://appshunter.io/developer/1793616106) |

## What reviewers say

### FoodMarble

[App page](https://appshunter.io/ios/app/foodmarble/id1257021857)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🚀 Instant breath test results
- 🔍 Helpful for identifying food intolerances
- 🤖 Useful device for SIBO recovery
- 📊 Provides data insights into gut health
- 👍 User-friendly app interface

**What reviewers complain about**

- 🐛 Buggy app with frequent crashes
- 🔍 Limited food database and search functionality
- 🤔 Confusing UI and navigation
- 🔢 Inconsistent or inaccurate breath test results
- 📝 Difficult to log and track meals accurately

**Reported bugs**

- 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**

- 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


### STACK DAYS Elite Training

[App page](https://appshunter.io/ios/app/stack-days-elite-training/id6741225635)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| STACK PRO | $249.00 | per month |


## Frequently asked 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.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*