# Simple Interval Timer vs Dynamic Runner

The clearest difference is review sentiment: Dynamic Runner at 96% against Simple Interval Timer's 50%. Dynamic Runner also leads on rating (4.9 vs 4.0) and ratings volume (361 vs 2). Simple Interval Timer's advantage is in-app purchases (none vs 2) and update cadence (every 5 days vs every 3 months). On price, ads and device support there is nothing between them.

Both are free to download. Dynamic Runner sells 2 in-app purchases, starting at $9.99 per month. Simple Interval Timer asks for nothing beyond the download.

Dynamic Runner holds the better App Store score, 4.9 against 4.0. That said, the two scores are not equally well evidenced: Dynamic Runner has 361 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 50% of Simple Interval Timer's written reviews are positive against 96% of Dynamic Runner's.

Simple Interval Timer ships an update every 5 days, Dynamic Runner every 3 months. The most recent releases landed on October 1, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Simple Interval Timer | Dynamic Runner |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (2 ratings)](https://appshunter.io/ios/app/simple-interval-timer-sit/id630361167/reviews) | **[4.9 (361 ratings)](https://appshunter.io/ios/app/dynamic-runner/id6449952624/reviews)** |
| Number of ratings | 2 | **361** |
| Positive reviews | 50.0% of reviews | **96.1% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 3 months |
| Monetization | **Free** | Subscription |
| Size | 2 MB | 91 MB |
| Requires iOS | **13.5** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [DES Productions](https://appshunter.io/developer/541744954) | [Flexible Marketing Media Inc](https://appshunter.io/developer/1615447023) |

## What reviewers say

### Simple Interval Timer

[App page](https://appshunter.io/ios/app/simple-interval-timer-sit/id630361167)

This app provides a customizable interval timer for various training methods like HIIT, Tabata, and boxing. Structure your workouts to achieve your fitness goals with configurable sets and timers.

**Highlights:** Customizable interval sets, Configurable workout values, Supports HIIT, Tabata, boxing, sprints, Workout structure and discipline, Achieve fitness goals

**Features:** macOS Compatibility

**In-app purchases:** none


### Dynamic Runner

[App page](https://appshunter.io/ios/app/dynamic-runner/id6449952624)

Enhance your running performance and prevent injuries with daily stretching, mobility, and strength training programs. Access a vast library of video routines designed to improve flexibility, speed, endurance, and recovery, all available across your devices.

**Highlights:** Daily stretching and mobility routines, Strength training programs, Injury prevention and rehab modules, Warmups and drills, Roll and release techniques, Video content updated regularly

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Dynamic Runner | $9.99 | per month |
| Dynamic Runner | $84.99 | per year |


## Frequently asked questions

### Is Simple Interval Timer free?

Simple Interval Timer is free to download, with no in-app purchases.

### Is Dynamic Runner free?

Dynamic Runner is free to download, with in-app purchases available.

### Which has better reviews, Simple Interval Timer or Dynamic Runner?

Dynamic Runner is rated higher. Simple Interval Timer averages 4.0 out of 5 from 2 ratings, while Dynamic Runner averages 4.9 from 361 ratings.

### Do Simple Interval Timer or Dynamic Runner have ads?

Neither Simple Interval Timer nor Dynamic Runner shows ads.

### Which is updated more often, Simple Interval Timer or Dynamic Runner?

Simple Interval Timer ships an update every 5 days, and Dynamic Runner every 3 months. Most recently, Simple Interval Timer was updated on October 1, 2026 and Dynamic Runner on October 10, 2026.

---

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