# Stack: Running Log — Run Happy. Run Fast!

> Run Happy. Run Fast! (iPhone/iPad app by RootCause LLC.)

- Source: https://appshunter.io/ios/app/stack/id6752502254 (this page in markdown: same URL + `.md`)
- Developer: [RootCause LLC](https://appshunter.io/developer/1759030942)
- Category: Health & Fitness
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 15.6 · 56 MB
- Languages: American English
- Released: 2026-01-12
- Data updated: 2026-02-26
- User reviews in markdown: https://appshunter.io/ios/app/stack/id6752502254/reviews.md

## What is Stack?

Most training apps overwhelm you with comparisons, arbitrary pace targets, AI-generated summaries, and constant recommendations.

Stack removes the complexity.

What’s left is a clean, focused system that helps you listen to your body and train based on how you actually feel not external metrics.

Train Smarter With Less 

- Track fatigue and form in one simple visual chart
- Identify your optimal training zones
- Prevent overtraining and undertraining
- Build consistent routines that support long-term progress
- Judgement free 

Stack is deliberately simple. When you remove pressure and unnecessary data, your training becomes more intuitive and sustainable. 

Less is more.

Start your 7-day free trial today. 

Privacy Policy: https://www.stackapp.run/privacy-policy
Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Stack Monthly Subscription | $2.99 | per month |
| Stack Yearly Subscription | $19.99 | per year |



## Version history (last 4 releases)

### 2.0.2 — 2026-02-26

Bug fix!

### 2.0.1 — 2026-02-24

Minor bug fix

### 2.0 — 2026-02-23

Full overhaul!

### 1.0 — 2026-01-12

No release notes.

## More apps by RootCause LLC

- [RootCause: Food & Symptoms](https://appshunter.io/ios/app/rootcause/id6569263070)
- [Chomp: Simple Macro Tracker](https://appshunter.io/ios/app/chomp/id6740447356)
- [Decaf - Quit Caffeine Fast](https://appshunter.io/ios/app/decaf/id6751217376)
- [HungryOwl: Ingredient Scanner](https://appshunter.io/ios/app/hungryowl/id6751246948)

All apps by RootCause LLC: https://appshunter.io/developer/1759030942

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-02-26.*