# Marbly vs Stack Tracker AI

The clearest difference is in-app purchases: Marbly at none against Stack Tracker AI's 2. Marbly also leads on iOS requirement (15.0 vs 26.0). Stack Tracker AI's advantage is device support. On price there is nothing between them.

Both are free to download. Stack Tracker AI sells 2 in-app purchases, starting at $1.99 per month. Marbly asks for nothing beyond the download.

## The numbers

| Metric | Marbly | Stack Tracker AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.0 (2 ratings)](https://appshunter.io/ios/app/stack-tracker-ai/id6740147043/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | — | No |
| Update frequency | — | Fortnightly |
| Monetization | — | Freemium |
| Size | 33 MB | 28 MB |
| Requires iOS | **15.0** | 26.0 |
| Devices | — | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Adrian Holzer](https://appshunter.io/developer/495338930) | [MD Apps, LLC](https://appshunter.io/developer/346437629) |

## What reviewers say

### Marbly

[App page](https://appshunter.io/ios/app/marbly/id6578448474)

**In-app purchases:** none


### Stack Tracker AI

[App page](https://appshunter.io/ios/app/stack-tracker-ai/id6740147043)

Effortlessly track, analyze, and optimize your supplement intake for improved wellness and fitness. Gain AI-powered insights, set flexible schedules, and visualize your progress with secure, private data storage.

**Highlights:** Seamless daily supplement tracking, AI-powered insights and trends, Flexible dose scheduling, Advanced progress visualizations, Private and secure data storage, Customizable supplement types

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $1.99 | per month |
| Annual | $9.99 | per year |


## Frequently asked questions

### Is Marbly free?

Marbly is free to download, with no in-app purchases.

### Is Stack Tracker AI free?

Stack Tracker AI is free to download, with in-app purchases available.

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