# Fitlife Training App vs Stack Tracker AI

The clearest difference is in-app purchases: Fitlife Training App at none against Stack Tracker AI's 2. Fitlife Training App also leads on device support (4 vs 2) and iOS requirement (15.5 vs 26.0). Stack Tracker AI's advantage is update cadence (fortnightly vs every 4 months). On price and ads there is nothing between them.

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

Fitlife Training App ships an update every 4 months, Stack Tracker AI fortnightly. The most recent releases landed on October 19, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Fitlife Training App | 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 | No |
| Update frequency | Every 4 months | **Fortnightly** |
| Monetization | — | Freemium |
| Size | 177 MB | 28 MB |
| Requires iOS | **15.5** | 26.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Fitlife Health Club ltd](https://appshunter.io/developer/1533684930) | [MD Apps, LLC](https://appshunter.io/developer/346437629) |

## What reviewers say

### Fitlife Training App

[App page](https://appshunter.io/ios/app/fitlife-training-app/id1658360686)

**Features:** Apple Wallet, Apple Watch app, Vision Pro support

**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 Fitlife Training App free?

Fitlife Training App 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.

### Do Fitlife Training App or Stack Tracker AI have ads?

Neither Fitlife Training App nor Stack Tracker AI shows ads.

### Which is updated more often, Fitlife Training App or Stack Tracker AI?

Fitlife Training App ships an update every 4 months, and Stack Tracker AI fortnightly. Most recently, Fitlife Training App was updated on October 19, 2026 and Stack Tracker AI on October 4, 2026.

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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.*